Handling Failed Disks

A memberís disk space is protected with RAID and one or two spare disks, except in the case of no-spare RAID policies, as described in Introduction to Member RAID Policies.

If a member has experienced a disk failure, the Member Disks window (Figure†9: Member Disks - PS5000 Array ) shows the failure, and the Alarms panel shows an alarm.

Note: Be sure to replace failed disks as soon as possible. Avoid running with a degraded RAID set. Disk failure in a RAID set that is already degraded will result in loss of data.

When a disk in a RAID set fails, a member behaves as follows:

For disk installation information, see Installing and Removing Disks.

When you replace a failed disk, a member behaves as follows:

If you have backups, you may be able to recover volume data, as follows:

  1. Remove the offline member from the group, as described in Removing a Member from a Group. Once removed, the array will be automatically reset to its original condition. This will remove all volume data and group configuration information from the array.
  2. Delete the affected volumes. The volume snapshots will also be deleted.
  3. Recreate the affected volumes.
  4. Recover the volume data from a backup or replica.

After installing a disk, check the status to ensure that the disk is either online or a spare, as shown in the Member Disks window (Figure†9: Member Disks - PS5000 Array ).