SCF Reference Manual for the Storage Subsystem (G06.27+, H06.04+)

Configuring and Managing Storage Pools for
Magnetic Disks
SCF Reference Manual for the Storage Subsystem—529937-008
9-9
Altering Storage Pool Attribute Values
•
Avoid overriding any safety checks whenever possible. Excluding a disk from a
storage pool even though a discrepancy exists could have severe consequences.
For example, storage-managed files on a physical volume are still accessible after
the physical volume has been excluded from a storage pool, but the catalog for the
storage pool is no longer in a consistent state.
You might be able to correct discrepancies created by safety overrides by using the
SMFIXUP utility. (See the Storage Management Foundation User’s Guide.)
Example
To remove a magnetic disk from a storage pool:
-> ALTER $DATA, POOL EXCLUDE
Altering Storage Pool Attribute Values
Use the ALTER POOL Command (page 14-54) to change the attributes of a storage
pool.
Considerations for ALTER POOL
•
TMF must be running on the system when you alter a storage pool.
•
The SMF Master Process ($ZSMS) must be in the STARTED state.
•
These attributes require that the storage pool process be in the STOPPED state or
not running:
Changes take effect when you restart the process.
•
All other storage pool process attributes can be altered regardless of whether the
storage pool process is running and regardless of its state.
Example
1. If necessary, stop the storage pool:
-> STOP $POOL00
2. Change one or more ALTER POOL Attributes (page 14-55). For example, to
change how often $POOL00 collects information about physical volumes in the
pool:
-> ALTER $POOL00, UPDATESTATS 3
3. Verify the configuration change:
-> INFO $POOL00, DETAIL
BACKUPCPU PRIMARYCPU STARTSTATE
HIGHPIN PROGRAM