HP Smart Storage Administrator - Manual (Page 41)

Operations 41
o Re-mirror the array and roll back to the contents of the backup array. Discard existing data.
This option re-creates the mirrored array but restores its original contents, which are in the backup
array. HP recommends that you do not perform this option under the following circumstances:
— In an online environment
— If the logical drive to be rolled back is mounted
— If the logical drive to be rolled back is in use by the operating system
o Activate the backup array.
This option makes the backup array fully accessible to the operating system. HP SSA removes the
designation "backup" from the name of the array.
Healing an array
The Heal Array operation enables you to enter a command to replace failed physical drives in the array with
healthy physical drives. After replacement, the original array and logical drive numbering is unaffected.
To use Heal Array, you must meet the following conditions:
• The array has at least one failed drive.
• The array is not transforming (for example, rebuilding to a spare).
• The array has a working cache, making it capable of transformation.
• The replacement physical drives and the original drives must be of the same interface type, such as SAS,
SATA, and so on.
• A sufficient number of unassigned physical drives of the correct size are available to replace each failed
physical drive in the array.
The correct size is defined as a drive as large as the smallest drive on the array, but no larger than the
smallest spare.
• If using an HP ProLiant Smart Array G6 or G7 controller, an SAAP 1.0 license is activated.
When you select Heal Array, and all conditions are met, one of the following actions occurs to the volume in
the array:
• If a volume has failed, HP SSA recreates the volume. This action occurs with a RAID 0 volume.
• If a volume is degraded, HP SSA rebuilds the volume.
Replacing an array
Some controllers may not support this option or might require a license key to enable the feature.
HP SSA enables you to transfer the contents of an array to an existing empty array or a new array. During
this operation, all logical drives transfer from the original array to the destination array. The original array is
deleted, and the drives that were being used are freed and listed as unassigned drives.
Replacing an array is a time-consuming process for two reasons: all data in each logical drive is copied to
the destination array, and the controller performs all data transformations while servicing IO requests to other
logical drives.
To perform the Replace Array operation, you must meet the following conditions:
• The destination array must have the same number of physical drives as the source or original array.
• Both the source and destination arrays must be in OK state.