diff --git a/test/functional/api/cas/cache.py b/test/functional/api/cas/cache.py
index b114da7..5c23cc4 100644
--- a/test/functional/api/cas/cache.py
+++ b/test/functional/api/cas/cache.py
@@ -1,36 +1,59 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-from api.cas.casadm_parser import *
+from datetime import timedelta
+from typing import List
+
+from api.cas import casadm
+from api.cas.cache_config import (
+    CacheLineSize,
+    CleaningPolicy,
+    CacheStatus,
+    CacheMode,
+    FlushParametersAlru,
+    FlushParametersAcp,
+    SeqCutOffParameters,
+    SeqCutOffPolicy,
+    PromotionPolicy,
+    PromotionParametersNhit,
+    CacheConfig,
+)
+from api.cas.casadm_params import StatsFilter
+from api.cas.casadm_parser import (get_cas_devices_dict, get_cores, get_flush_parameters_alru,
+                                   get_flush_parameters_acp, get_io_class_list)
 from api.cas.core import Core
 from api.cas.dmesg import get_metadata_size_on_device
 from api.cas.statistics import CacheStats, CacheIoClassStats
 from connection.utils.output import Output
+from storage_devices.device import Device
 from test_tools.os_tools import sync
+from type_def.size import Size
 
 
 class Cache:
-    def __init__(self, device: Device, cache_id: int = None) -> None:
-        self.cache_device = device
-        self.cache_id = cache_id if cache_id else self.__get_cache_id()
-        self.__cache_line_size = None
-
-    def __get_cache_id(self) -> int:
-        device_path = self.__get_cache_device_path()
+    def __init__(
+        self, cache_id: int, device: Device = None, cache_line_size: CacheLineSize = None
+    ) -> None:
+        self.cache_id = cache_id
+        self.cache_device = device if device else self.__get_cache_device()
+        self.__cache_line_size = cache_line_size
 
+    def __get_cache_device(self) -> Device | None:
         caches_dict = get_cas_devices_dict()["caches"]
+        cache = next(
+            iter([cache for cache in caches_dict.values() if cache["id"] == self.cache_id])
+        )
 
-        for cache in caches_dict.values():
-            if cache["device_path"] == device_path:
-                return int(cache["id"])
+        if not cache:
+            return None
 
-        raise Exception(f"There is no cache started on {device_path}")
+        if cache["device_path"] is "-":
+            return None
 
-    def __get_cache_device_path(self) -> str:
-        return self.cache_device.path if self.cache_device is not None else "-"
+        return Device(path=cache["device_path"])
 
     def get_core_devices(self) -> list:
         return get_cores(self.cache_id)
@@ -195,7 +218,7 @@ class Cache:
         return casadm.set_param_promotion_nhit(
             self.cache_id,
             threshold=promotion_params_nhit.threshold,
-            trigger=promotion_params_nhit.trigger
+            trigger=promotion_params_nhit.trigger,
         )
 
     def get_cache_config(self) -> CacheConfig:
@@ -208,10 +231,18 @@ class Cache:
     def standby_detach(self, shortcut: bool = False) -> Output:
         return casadm.standby_detach_cache(cache_id=self.cache_id, shortcut=shortcut)
 
-    def standby_activate(self, device, shortcut: bool = False) -> Output:
+    def standby_activate(self, device: Device, shortcut: bool = False) -> Output:
         return casadm.standby_activate_cache(
             cache_id=self.cache_id, cache_dev=device, shortcut=shortcut
         )
 
+    def attach(self, device: Device, force: bool = False) -> Output:
+        cmd_output = casadm.attach_cache(cache_id=self.cache_id, device=device, force=force)
+        return cmd_output
+
+    def detach(self) -> Output:
+        cmd_output = casadm.detach_cache(cache_id=self.cache_id)
+        return cmd_output
+
     def has_volatile_metadata(self) -> bool:
         return self.get_metadata_size_on_disk() == Size.zero()
diff --git a/test/functional/api/cas/casadm.py b/test/functional/api/cas/casadm.py
index ef033a1..1b61444 100644
--- a/test/functional/api/cas/casadm.py
+++ b/test/functional/api/cas/casadm.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -48,6 +48,7 @@ def start_cache(
     )
     _cache_id = str(cache_id) if cache_id is not None else None
     _cache_mode = cache_mode.name.lower() if cache_mode else None
+
     output = TestRun.executor.run(
         start_cmd(
             cache_dev=cache_dev.path,
@@ -59,33 +60,67 @@ def start_cache(
             shortcut=shortcut,
         )
     )
+
     if output.exit_code != 0:
         raise CmdException("Failed to start cache.", output)
-    return Cache(cache_dev)
+
+    if not _cache_id:
+        from api.cas.casadm_parser import get_caches
+
+        cache_list = get_caches()
+        # compare path of old and new caches, returning the only one created now.
+        # This will be needed in case cache_id not present in cli command
+
+        new_cache = next(cache for cache in cache_list if cache.cache_device.path == cache_dev.path)
+        _cache_id = new_cache.cache_id
+
+    cache = Cache(cache_id=int(_cache_id), device=cache_dev, cache_line_size=_cache_line_size)
+    TestRun.dut.cache_list.append(cache)
+    return cache
 
 
 def load_cache(device: Device, shortcut: bool = False) -> Cache:
+    from api.cas.casadm_parser import get_caches
+
+    caches_before_load = get_caches()
     output = TestRun.executor.run(load_cmd(cache_dev=device.path, shortcut=shortcut))
+
     if output.exit_code != 0:
         raise CmdException("Failed to load cache.", output)
-    return Cache(device)
+
+    caches_after_load = get_caches()
+    new_cache = next(cache for cache in caches_after_load if cache not in caches_before_load)
+    cache = Cache(cache_id=new_cache.cache_id, device=new_cache.cache_device)
+    TestRun.dut.cache_list.append(cache)
+    return cache
 
 
-def attach_cache(cache_id: int, device: Device, force: bool, shortcut: bool = False) -> Output:
+def attach_cache(
+    cache_id: int, device: Device, force: bool = False, shortcut: bool = False
+) -> Output:
     output = TestRun.executor.run(
         attach_cache_cmd(
             cache_dev=device.path, cache_id=str(cache_id), force=force, shortcut=shortcut
         )
     )
+
     if output.exit_code != 0:
         raise CmdException("Failed to attach cache.", output)
+
+    attached_cache = next(cache for cache in TestRun.dut.cache_list if cache.cache_id == cache_id)
+    attached_cache.cache_device = device
+
     return output
 
 
 def detach_cache(cache_id: int, shortcut: bool = False) -> Output:
     output = TestRun.executor.run(detach_cache_cmd(cache_id=str(cache_id), shortcut=shortcut))
+
     if output.exit_code != 0:
         raise CmdException("Failed to detach cache.", output)
+
+    detached_cache = next(cache for cache in TestRun.dut.cache_list if cache.cache_id == cache_id)
+    detached_cache.cache_device = None
     return output
 
 
@@ -93,8 +128,16 @@ def stop_cache(cache_id: int, no_data_flush: bool = False, shortcut: bool = Fals
     output = TestRun.executor.run(
         stop_cmd(cache_id=str(cache_id), no_data_flush=no_data_flush, shortcut=shortcut)
     )
+
     if output.exit_code != 0:
         raise CmdException("Failed to stop cache.", output)
+
+    TestRun.dut.cache_list = [
+        cache for cache in TestRun.dut.cache_list if cache.cache_id != cache_id
+    ]
+
+    TestRun.dut.core_list = [core for core in TestRun.dut.core_list if core.cache_id != cache_id]
+
     return output
 
 
@@ -192,7 +235,7 @@ def set_param_promotion(cache_id: int, policy: PromotionPolicy, shortcut: bool =
 
 
 def set_param_promotion_nhit(
-        cache_id: int, threshold: int = None, trigger: int = None, shortcut: bool = False
+    cache_id: int, threshold: int = None, trigger: int = None, shortcut: bool = False
 ) -> Output:
     _threshold = str(threshold) if threshold is not None else None
     _trigger = str(trigger) if trigger is not None else None
@@ -267,7 +310,7 @@ def get_param_cleaning_acp(
 
 
 def get_param_promotion(
-        cache_id: int, output_format: OutputFormat = None, shortcut: bool = False
+    cache_id: int, output_format: OutputFormat = None, shortcut: bool = False
 ) -> Output:
     _output_format = output_format.name if output_format else None
     output = TestRun.executor.run(
@@ -281,7 +324,7 @@ def get_param_promotion(
 
 
 def get_param_promotion_nhit(
-        cache_id: int, output_format: OutputFormat = None, shortcut: bool = False
+    cache_id: int, output_format: OutputFormat = None, shortcut: bool = False
 ) -> Output:
     _output_format = output_format.name if output_format else None
     output = TestRun.executor.run(
@@ -325,7 +368,11 @@ def add_core(cache: Cache, core_dev: Device, core_id: int = None, shortcut: bool
     )
     if output.exit_code != 0:
         raise CmdException("Failed to add core.", output)
-    return Core(core_dev.path, cache.cache_id)
+
+    core = Core(core_dev.path, cache.cache_id)
+    TestRun.dut.core_list.append(core)
+
+    return core
 
 
 def remove_core(cache_id: int, core_id: int, force: bool = False, shortcut: bool = False) -> Output:
@@ -336,6 +383,12 @@ def remove_core(cache_id: int, core_id: int, force: bool = False, shortcut: bool
     )
     if output.exit_code != 0:
         raise CmdException("Failed to remove core.", output)
+
+    TestRun.dut.core_list = [
+        core
+        for core in TestRun.dut.core_list
+        if core.cache_id != cache_id or core.core_id != core_id
+    ]
     return output
 
 
@@ -485,22 +538,41 @@ def standby_init(
             shortcut=shortcut,
         )
     )
+
     if output.exit_code != 0:
         raise CmdException("Failed to init standby cache.", output)
-    return Cache(cache_dev)
+    return Cache(cache_id=cache_id, device=cache_dev)
 
 
 def standby_load(cache_dev: Device, shortcut: bool = False) -> Cache:
+    from api.cas.casadm_parser import get_caches
+
+    caches_before_load = get_caches()
     output = TestRun.executor.run(standby_load_cmd(cache_dev=cache_dev.path, shortcut=shortcut))
+
     if output.exit_code != 0:
-        raise CmdException("Failed to load standby cache.", output)
-    return Cache(cache_dev)
+        raise CmdException("Failed to load cache.", output)
+    caches_after_load = get_caches()
+    # compare ids of old and new caches, returning the only one created now
+    new_cache = next(
+        cache
+        for cache in caches_after_load
+        if cache.cache_id not in [cache.cache_id for cache in caches_before_load]
+    )
+    cache = Cache(cache_id=new_cache.cache_id, device=new_cache.cache_device)
+    TestRun.dut.cache_list.append(cache)
+
+    return cache
 
 
 def standby_detach_cache(cache_id: int, shortcut: bool = False) -> Output:
     output = TestRun.executor.run(standby_detach_cmd(cache_id=str(cache_id), shortcut=shortcut))
     if output.exit_code != 0:
         raise CmdException("Failed to detach standby cache.", output)
+
+    detached_cache = next(cache for cache in TestRun.dut.cache_list if cache.cache_id == cache_id)
+    detached_cache.cache_device = None
+
     return output
 
 
@@ -510,6 +582,10 @@ def standby_activate_cache(cache_dev: Device, cache_id: int, shortcut: bool = Fa
     )
     if output.exit_code != 0:
         raise CmdException("Failed to activate standby cache.", output)
+
+    activated_cache = next(cache for cache in TestRun.dut.cache_list if cache.cache_id == cache_id)
+    activated_cache.cache_device = cache_dev
+
     return output
 
 
diff --git a/test/functional/api/cas/casadm_params.py b/test/functional/api/cas/casadm_params.py
index 6f8eadb..c67855f 100644
--- a/test/functional/api/cas/casadm_params.py
+++ b/test/functional/api/cas/casadm_params.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -26,7 +26,7 @@ class OutputFormat(Enum):
 
 class StatsFilter(Enum):
     all = "all"
-    conf = "configuration"
+    conf = "config"
     usage = "usage"
     req = "request"
     blk = "block"
diff --git a/test/functional/api/cas/casadm_parser.py b/test/functional/api/cas/casadm_parser.py
index da3090a..a8c8e73 100644
--- a/test/functional/api/cas/casadm_parser.py
+++ b/test/functional/api/cas/casadm_parser.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -14,6 +14,7 @@ from typing import List
 from api.cas import casadm
 from api.cas.cache_config import *
 from api.cas.casadm_params import *
+from api.cas.core_config import CoreStatus
 from api.cas.ioclass_config import IoClass
 from api.cas.version import CasVersion
 from core.test_run_utils import TestRun
@@ -54,12 +55,12 @@ def get_caches() -> list:
 
 
 def get_cores(cache_id: int) -> list:
-    from api.cas.core import Core, CoreStatus
+    from api.cas.core import Core
 
     cores_dict = get_cas_devices_dict()["cores"].values()
 
     def is_active(core):
-        return CoreStatus[core["status"].lower()] == CoreStatus.active
+        return core["status"] == CoreStatus.active
 
     return [
         Core(core["device_path"], core["cache_id"])
@@ -69,12 +70,12 @@ def get_cores(cache_id: int) -> list:
 
 
 def get_inactive_cores(cache_id: int) -> list:
-    from api.cas.core import Core, CoreStatus
+    from api.cas.core import Core
 
     cores_dict = get_cas_devices_dict()["cores"].values()
 
     def is_inactive(core):
-        return CoreStatus[core["status"].lower()] == CoreStatus.inactive
+        return core["status"] == CoreStatus.inactive
 
     return [
         Core(core["device_path"], core["cache_id"])
@@ -84,12 +85,12 @@ def get_inactive_cores(cache_id: int) -> list:
 
 
 def get_detached_cores(cache_id: int) -> list:
-    from api.cas.core import Core, CoreStatus
+    from api.cas.core import Core
 
     cores_dict = get_cas_devices_dict()["cores"].values()
 
     def is_detached(core):
-        return CoreStatus[core["status"].lower()] == CoreStatus.detached
+        return core["status"] == CoreStatus.detached
 
     return [
         Core(core["device_path"], core["cache_id"])
@@ -110,15 +111,17 @@ def get_cas_devices_dict() -> dict:
             params = [
                 ("id", cache_id),
                 ("device_path", device["disk"]),
-                ("status", device["status"]),
+                ("status", CacheStatus(device["status"].lower())),
             ]
             devices["caches"][cache_id] = dict([(key, value) for key, value in params])
 
         elif device["type"] == "core":
             params = [
                 ("cache_id", cache_id),
+                ("core_id", (int(device["id"]) if device["id"] != "-" else device["id"])),
                 ("device_path", device["disk"]),
-                ("status", device["status"]),
+                ("status", CoreStatus(device["status"].lower())),
+                ("exp_obj", device["device"]),
             ]
             if core_pool:
                 params.append(("core_pool", device))
diff --git a/test/functional/api/cas/cli_messages.py b/test/functional/api/cas/cli_messages.py
index 78da17b..eb7e0de 100644
--- a/test/functional/api/cas/cli_messages.py
+++ b/test/functional/api/cas/cli_messages.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies
+# Copyright(c) 2024-2025 Huawei Technologies
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -233,6 +233,12 @@ malformed_io_class_header = [
 
 unexpected_cls_option = [r"Option '--cache-line-size \(-x\)' is not allowed"]
 
+attach_not_enough_memory = [
+    r"Not enough free RAM\.\nYou need at least \d+.\d+GB to attach a device to cache "
+    r"with cache line size equal \d+kB.\n"
+    r"Try with greater cache line size\."
+]
+
 
 def check_stderr_msg(output: Output, expected_messages, negate=False):
     return __check_string_msg(output.stderr, expected_messages, negate)
diff --git a/test/functional/api/cas/core.py b/test/functional/api/cas/core.py
index 15ae71b..3bf1fe1 100644
--- a/test/functional/api/cas/core.py
+++ b/test/functional/api/cas/core.py
@@ -1,17 +1,17 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 from datetime import timedelta
 from typing import List
-from enum import Enum
 
 from api.cas import casadm
 from api.cas.cache_config import SeqCutOffParameters, SeqCutOffPolicy
 from api.cas.casadm_params import StatsFilter
-from api.cas.casadm_parser import get_seq_cut_off_parameters, get_core_info_for_cache_by_path
+from api.cas.casadm_parser import get_seq_cut_off_parameters, get_cas_devices_dict
+from api.cas.core_config import CoreStatus
 from api.cas.statistics import CoreStats, CoreIoClassStats
 from core.test_run_utils import TestRun
 from storage_devices.device import Device
@@ -21,13 +21,6 @@ from test_tools.common.wait import wait
 from type_def.size import Unit, Size
 
 
-class CoreStatus(Enum):
-    empty = 0
-    active = 1
-    inactive = 2
-    detached = 3
-
-
 SEQ_CUTOFF_THRESHOLD_MAX = Size(4194181, Unit.KibiByte)
 SEQ_CUT_OFF_THRESHOLD_DEFAULT = Size(1, Unit.MebiByte)
 
@@ -46,9 +39,23 @@ class Core(Device):
         self.partitions = []
         self.block_size = None
 
-    def __get_core_info(self):
-        return get_core_info_for_cache_by_path(core_disk_path=self.core_device.path,
-                                               target_cache_id=self.cache_id)
+    def __get_core_info(self) -> dict | None:
+        core_dicts = get_cas_devices_dict()["cores"].values()
+        # for core
+        core_device = [
+            core
+            for core in core_dicts
+            if core["cache_id"] == self.cache_id and core["device_path"] == self.core_device.path
+        ]
+        if core_device:
+            return core_device[0]
+
+        # for core pool
+        core_pool_dicts = get_cas_devices_dict()["core_pool"].values()
+        core_pool_device = [
+            core for core in core_pool_dicts if core["device_path"] == self.core_device.path
+        ]
+        return core_pool_device[0]
 
     def create_filesystem(self, fs_type: Filesystem, force=True, blocksize=None):
         super().create_filesystem(fs_type, force, blocksize)
@@ -78,8 +85,8 @@ class Core(Device):
             percentage_val=percentage_val,
         )
 
-    def get_status(self):
-        return CoreStatus[self.__get_core_info()["status"].lower()]
+    def get_status(self) -> CoreStatus:
+        return self.__get_core_info()["status"]
 
     def get_seq_cut_off_parameters(self):
         return get_seq_cut_off_parameters(self.cache_id, self.core_id)
diff --git a/test/functional/api/cas/core_config.py b/test/functional/api/cas/core_config.py
new file mode 100644
index 0000000..d4d7693
--- /dev/null
+++ b/test/functional/api/cas/core_config.py
@@ -0,0 +1,16 @@
+#
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+from enum import Enum
+
+
+class CoreStatus(Enum):
+    empty = "empty"
+    active = "active"
+    inactive = "inactive"
+    detached = "detached"
+
+    def __str__(self):
+        return self.value
diff --git a/test/functional/api/cas/ioclass_config.py b/test/functional/api/cas/ioclass_config.py
index 93a231e..ebf3d6a 100644
--- a/test/functional/api/cas/ioclass_config.py
+++ b/test/functional/api/cas/ioclass_config.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -17,7 +17,7 @@ from core.test_run import TestRun
 from test_tools.fs_tools import write_file
 from test_tools.os_tools import get_kernel_version
 
-default_config_file_path = "/tmp/opencas_ioclass.conf"
+default_config_file_path = TestRun.TEST_RUN_DATA_PATH + "/opencas_ioclass.conf"
 
 MAX_IO_CLASS_ID = 32
 MAX_IO_CLASS_PRIORITY = 255
diff --git a/test/functional/api/cas/statistics.py b/test/functional/api/cas/statistics.py
index e103bc5..3041a3e 100644
--- a/test/functional/api/cas/statistics.py
+++ b/test/functional/api/cas/statistics.py
@@ -1,16 +1,17 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 import csv
+
 from datetime import timedelta
 from enum import Enum
 from typing import List
-
 from api.cas import casadm
 from api.cas.casadm_params import StatsFilter
+from connection.utils.output import CmdException
 from type_def.size import Size, Unit
 
 
@@ -22,6 +23,7 @@ class UnitType(Enum):
     kibibyte = "[KiB]"
     gibibyte = "[GiB]"
     seconds = "[s]"
+    byte = "[B]"
 
     def __str__(self):
         return self.value
@@ -57,6 +59,9 @@ class CacheStats:
                 case StatsFilter.err:
                     self.error_stats = ErrorStats(stats_dict, percentage_val)
 
+        if stats_dict:
+            raise CmdException(f"Unknown stat(s) left after parsing output cmd\n{stats_dict}")
+
     def __str__(self):
         # stats_list contains all Class.__str__ methods initialized in CacheStats
         stats_list = [str(getattr(self, stats_item)) for stats_item in self.__dict__]
@@ -68,6 +73,9 @@ class CacheStats:
             getattr(other, stats_item) for stats_item in other.__dict__
         ]
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class CoreStats:
     def __init__(
@@ -92,6 +100,9 @@ class CoreStats:
                 case StatsFilter.err:
                     self.error_stats = ErrorStats(stats_dict, percentage_val)
 
+        if stats_dict:
+            raise CmdException(f"Unknown stat(s) left after parsing output cmd\n{stats_dict}")
+
     def __str__(self):
         # stats_list contains all Class.__str__ methods initialized in CacheStats
         stats_list = [str(getattr(self, stats_item)) for stats_item in self.__dict__]
@@ -103,6 +114,9 @@ class CoreStats:
             getattr(other, stats_item) for stats_item in other.__dict__
         ]
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class CoreIoClassStats:
     def __init__(
@@ -128,6 +142,9 @@ class CoreIoClassStats:
                 case StatsFilter.blk:
                     self.block_stats = BlockStats(stats_dict, percentage_val)
 
+        if stats_dict:
+            raise CmdException(f"Unknown stat(s) left after parsing output cmd\n{stats_dict}")
+
     def __eq__(self, other):
         # check if all initialized variable in self(CacheStats) match other(CacheStats)
         return [getattr(self, stats_item) for stats_item in self.__dict__] == [
@@ -139,6 +156,9 @@ class CoreIoClassStats:
         stats_list = [str(getattr(self, stats_item)) for stats_item in self.__dict__]
         return "\n".join(stats_list)
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class CacheIoClassStats(CoreIoClassStats):
     def __init__(
@@ -182,6 +202,22 @@ class CacheConfigStats:
         self.dirty_for = parse_value(value=stats_dict["Dirty for [s]"], unit_type=UnitType.seconds)
         self.status = stats_dict["Status"]
 
+        del stats_dict["Cache Id"]
+        del stats_dict["Cache Size [4KiB Blocks]"]
+        del stats_dict["Cache Size [GiB]"]
+        del stats_dict["Cache Device"]
+        del stats_dict["Exported Object"]
+        del stats_dict["Core Devices"]
+        del stats_dict["Inactive Core Devices"]
+        del stats_dict["Write Policy"]
+        del stats_dict["Cleaning Policy"]
+        del stats_dict["Promotion Policy"]
+        del stats_dict["Cache line size [KiB]"]
+        del stats_dict[footprint_key]
+        del stats_dict["Dirty for [s]"]
+        del stats_dict["Dirty for"]
+        del stats_dict["Status"]
+
     def __str__(self):
         return (
             f"Config stats:\n"
@@ -219,10 +255,13 @@ class CacheConfigStats:
             and self.status == other.status
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class CoreConfigStats:
     def __init__(self, stats_dict):
-        self.core_id = stats_dict["Core Id"]
+        self.core_id = int(stats_dict["Core Id"])
         self.core_dev = stats_dict["Core Device"]
         self.exp_obj = stats_dict["Exported Object"]
         self.core_size = parse_value(
@@ -235,6 +274,17 @@ class CoreConfigStats:
         )
         self.seq_cutoff_policy = stats_dict["Seq cutoff policy"]
 
+        del stats_dict["Core Id"]
+        del stats_dict["Core Device"]
+        del stats_dict["Exported Object"]
+        del stats_dict["Core Size [4KiB Blocks]"]
+        del stats_dict["Core Size [GiB]"]
+        del stats_dict["Dirty for [s]"]
+        del stats_dict["Dirty for"]
+        del stats_dict["Status"]
+        del stats_dict["Seq cutoff threshold [KiB]"]
+        del stats_dict["Seq cutoff policy"]
+
     def __str__(self):
         return (
             f"Config stats:\n"
@@ -262,6 +312,9 @@ class CoreConfigStats:
             and self.seq_cutoff_policy == other.seq_cutoff_policy
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class IoClassConfigStats:
     def __init__(self, stats_dict):
@@ -270,6 +323,11 @@ class IoClassConfigStats:
         self.eviction_priority = stats_dict["Eviction priority"]
         self.max_size = stats_dict["Max size"]
 
+        del stats_dict["IO class ID"]
+        del stats_dict["IO class name"]
+        del stats_dict["Eviction priority"]
+        del stats_dict["Max size"]
+
     def __str__(self):
         return (
             f"Config stats:\n"
@@ -289,6 +347,9 @@ class IoClassConfigStats:
             and self.max_size == other.max_size
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class UsageStats:
     def __init__(self, stats_dict, percentage_val):
@@ -310,6 +371,18 @@ class UsageStats:
                 value=stats_dict[f"Inactive Dirty {unit}"], unit_type=unit
             )
 
+        for unit in [UnitType.percentage, UnitType.block_4k]:
+            del stats_dict[f"Occupancy {unit}"]
+            del stats_dict[f"Free {unit}"]
+            del stats_dict[f"Clean {unit}"]
+            del stats_dict[f"Dirty {unit}"]
+            if f"Inactive Dirty {unit}" in stats_dict:
+                del stats_dict[f"Inactive Occupancy {unit}"]
+            if f"Inactive Clean {unit}" in stats_dict:
+                del stats_dict[f"Inactive Clean {unit}"]
+            if f"Inactive Dirty {unit}" in stats_dict:
+                del stats_dict[f"Inactive Dirty {unit}"]
+
     def __str__(self):
         return (
             f"Usage stats:\n"
@@ -335,6 +408,9 @@ class UsageStats:
     def __ne__(self, other):
         return not self == other
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class IoClassUsageStats:
     def __init__(self, stats_dict, percentage_val):
@@ -343,6 +419,11 @@ class IoClassUsageStats:
         self.clean = parse_value(value=stats_dict[f"Clean {unit}"], unit_type=unit)
         self.dirty = parse_value(value=stats_dict[f"Dirty {unit}"], unit_type=unit)
 
+        for unit in [UnitType.percentage, UnitType.block_4k]:
+            del stats_dict[f"Occupancy {unit}"]
+            del stats_dict[f"Clean {unit}"]
+            del stats_dict[f"Dirty {unit}"]
+
     def __str__(self):
         return (
             f"Usage stats:\n"
@@ -366,15 +447,22 @@ class IoClassUsageStats:
     def __ne__(self, other):
         return not self == other
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class RequestStats:
     def __init__(self, stats_dict, percentage_val):
         unit = UnitType.percentage if percentage_val else UnitType.requests
         self.read = RequestStatsChunk(
-            stats_dict=stats_dict, percentage_val=percentage_val, operation=OperationType.read
+            stats_dict=stats_dict,
+            percentage_val=percentage_val,
+            operation=OperationType.read,
         )
         self.write = RequestStatsChunk(
-            stats_dict=stats_dict, percentage_val=percentage_val, operation=OperationType.write
+            stats_dict=stats_dict,
+            percentage_val=percentage_val,
+            operation=OperationType.write,
         )
         self.pass_through_reads = parse_value(
             value=stats_dict[f"Pass-Through reads {unit}"], unit_type=unit
@@ -389,6 +477,17 @@ class RequestStats:
             value=stats_dict[f"Total requests {unit}"], unit_type=unit
         )
 
+        for unit in [UnitType.percentage, UnitType.requests]:
+            for operation in [OperationType.read, OperationType.write]:
+                del stats_dict[f"{operation} hits {unit}"]
+                del stats_dict[f"{operation} partial misses {unit}"]
+                del stats_dict[f"{operation} full misses {unit}"]
+                del stats_dict[f"{operation} total {unit}"]
+            del stats_dict[f"Pass-Through reads {unit}"]
+            del stats_dict[f"Pass-Through writes {unit}"]
+            del stats_dict[f"Serviced requests {unit}"]
+            del stats_dict[f"Total requests {unit}"]
+
     def __str__(self):
         return (
             f"Request stats:\n"
@@ -412,6 +511,9 @@ class RequestStats:
             and self.requests_total == other.requests_total
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class RequestStatsChunk:
     def __init__(self, stats_dict, percentage_val: bool, operation: OperationType):
@@ -443,6 +545,9 @@ class RequestStatsChunk:
             and self.total == other.total
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class BlockStats:
     def __init__(self, stats_dict, percentage_val):
@@ -458,6 +563,12 @@ class BlockStats:
             device="exported object",
         )
 
+        for unit in [UnitType.percentage, UnitType.block_4k]:
+            for device in ["core", "cache", "exported object"]:
+                del stats_dict[f"Reads from {device} {unit}"]
+                del stats_dict[f"Writes to {device} {unit}"]
+                del stats_dict[f"Total to/from {device} {unit}"]
+
     def __str__(self):
         return (
             f"Block stats:\n"
@@ -473,6 +584,9 @@ class BlockStats:
             self.core == other.core and self.cache == other.cache and self.exp_obj == other.exp_obj
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class ErrorStats:
     def __init__(self, stats_dict, percentage_val):
@@ -485,6 +599,13 @@ class ErrorStats:
         )
         self.total_errors = parse_value(value=stats_dict[f"Total errors {unit}"], unit_type=unit)
 
+        for unit in [UnitType.percentage, UnitType.requests]:
+            for device in ["Core", "Cache"]:
+                del stats_dict[f"{device} read errors {unit}"]
+                del stats_dict[f"{device} write errors {unit}"]
+                del stats_dict[f"{device} total errors {unit}"]
+            del stats_dict[f"Total errors {unit}"]
+
     def __str__(self):
         return (
             f"Error stats:\n"
@@ -502,6 +623,9 @@ class ErrorStats:
             and self.total_errors == other.total_errors
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class BasicStatsChunk:
     def __init__(self, stats_dict: dict, percentage_val: bool, device: str):
@@ -520,6 +644,9 @@ class BasicStatsChunk:
             self.reads == other.reads and self.writes == other.writes and self.total == other.total
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 class BasicStatsChunkError:
     def __init__(self, stats_dict: dict, percentage_val: bool, device: str):
@@ -538,6 +665,9 @@ class BasicStatsChunkError:
             self.reads == other.reads and self.writes == other.writes and self.total == other.total
         )
 
+    def __iter__(self):
+        return iter([getattr(self, stats_item) for stats_item in self.__dict__])
+
 
 def get_stat_value(stat_dict: dict, key: str):
     idx = key.index("[")
@@ -583,10 +713,10 @@ def _get_section_filters(filter: List[StatsFilter], io_class_stats: bool = False
 
 
 def get_stats_dict(
-        filter: List[StatsFilter],
-        cache_id: int,
-        core_id: int = None,
-        io_class_id: int = None
+    filter: List[StatsFilter],
+    cache_id: int,
+    core_id: int = None,
+    io_class_id: int = None,
 ):
     csv_stats = casadm.print_statistics(
         cache_id=cache_id,
diff --git a/test/functional/tests/conftest.py b/test/functional/tests/conftest.py
index 2e42d24..4460d6c 100644
--- a/test/functional/tests/conftest.py
+++ b/test/functional/tests/conftest.py
@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2023-2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2023-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -28,12 +28,16 @@ from test_tools.udev import Udev
 from test_tools.disk_tools import PartitionTable, create_partition_table
 from test_tools.device_mapper import DeviceMapper
 from test_tools.mdadm import Mdadm
-from test_tools.fs_tools import remove
+from test_tools.fs_tools import remove, check_if_directory_exists, create_directory
 from test_tools import initramfs, git
 from log.logger import create_log, Log
 from test_utils.common.singleton import Singleton
 from storage_devices.lvm import Lvm, LvmConfiguration
 from storage_devices.disk import Disk
+from storage_devices.drbd import Drbd
+
+
+TEST_RUN_DATA_PATH = "/tmp/open_cas_test_data"
 
 
 def pytest_addoption(parser):
@@ -132,6 +136,9 @@ def pytest_runtest_setup(item):
         TestRun.LOGGER.info(f"DUT info: {TestRun.dut}")
         TestRun.dut.plugin_manager = TestRun.plugin_manager
         TestRun.dut.executor = TestRun.executor
+        TestRun.TEST_RUN_DATA_PATH = TEST_RUN_DATA_PATH
+        TestRun.dut.cache_list = []
+        TestRun.dut.core_list = []
         TestRun.duts.append(TestRun.dut)
 
         base_prepare(item)
@@ -184,6 +191,16 @@ def base_prepare(item):
                         Udev.settle()
 
         RamDisk.remove_all()
+
+        if check_if_directory_exists(path=TEST_RUN_DATA_PATH):
+            remove(
+                path=posixpath.join(TEST_RUN_DATA_PATH, "*"),
+                force=True,
+                recursive=True,
+            )
+        else:
+            create_directory(path=TEST_RUN_DATA_PATH)
+
         for disk in TestRun.disks.values():
             disk_serial = Disk.get_disk_serial_number(disk.path)
             if disk.serial_number and disk.serial_number != disk_serial:
@@ -250,6 +267,14 @@ def pytest_runtest_teardown():
 
                 DeviceMapper.remove_all()
                 RamDisk.remove_all()
+
+                if check_if_directory_exists(path=TEST_RUN_DATA_PATH):
+                    remove(
+                        path=posixpath.join(TEST_RUN_DATA_PATH, "*"),
+                        force=True,
+                        recursive=True,
+                    )
+
         except Exception as ex:
             TestRun.LOGGER.warning(
                 f"Exception occurred during platform cleanup.\n"
@@ -296,14 +321,14 @@ def unmount_cas_devices():
 
 
 def __drbd_cleanup():
-    from storage_devices.drbd import Drbd
-
     Drbd.down_all()
-    # If drbd instance had been configured on top of the CAS, the previos attempt to stop
+    # If drbd instance had been configured on top of the CAS, the previous attempt to stop
     # failed. As drbd has been stopped try to stop CAS one more time.
     if installer.check_if_installed():
         casadm.stop_all_caches()
 
+    remove("/etc/drbd.d/*.res", force=True, ignore_errors=True)
+
 
 class Opencas(metaclass=Singleton):
     def __init__(self, repo_dir, working_dir):