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tunedasd: add copy_pair swap capability

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Add an option to tunedasd to trigger a copy pair swap using the appropriate
ioctl for DASD devices.

      -s, --copy-pair-swap COPY_PAIR

This command requires a comma separated pair of primary,secondary to be
specified. In case of success the old secondary will become the new primary
device and the old primary will become a secondary device.

Example:

tunedasd /dev/dasda -s 0.0.9700,0.0.9740

This will set the old secondary device 0.0.9740 as the new primary.
The old primary device 0.0.9700 will automatically become a secondary
device.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Stefan Haberland
2022-11-11 13:17:32 +01:00
committed by Jan Höppner
parent 3aa7f6e298
commit 3f12bdf4c7
6 changed files with 138 additions and 26 deletions
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tunedasd/include/disk.h
+1
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@@ -31,6 +31,7 @@ int disk_query_reserve_status(char* device);
int disk_profile (char* device, char* prof_item);
int disk_reset_prof(char *device);
int disk_reset_chpid(char *device, char *chpid);
int disk_copy_swap(char *device, char *copy_pair);
#endif /* not DISK_H */