Offline Disk Group

What Caused the Problem?

A disk group may have an Offline status for the following reasons:

• You inadvertently placed the disk group offline (see recovery steps below).
• You were performing a disk group relocation operation and inserted all of the physical disks in the destination storage array but the disk group is still showing an Offline status. This occurs if the disk group you are importing contains unreadable sectors which causes the unreadable sectors log on the destination storage array to be filled to its maximum capacity. As a result, the relocation operation fails (see recovery steps below).
• You manually placed the disk group Offline in preparation for moving the physical disks to another storage array (disk group relocation). If this is the reason, then don't follow these recovery steps. Instead, follow the instructions in the appropriate documentation for moving physical disks.

The Recovery Guru Details area provides specific information you will need as you follow the recovery steps.

Recovery Steps

1	If... Then... The disk group was inadvertently placed Offline Bring the disk group back Online by highlighting the disk group and selecting Advanced >> Maintenance >> Place Disk Group >> Online. Go to step 5. The disk group remains in an Offline status even though you have inserted all physical disks into the destination storage array during a virtual disk relocation operation The disk group relocation operation probably failed because the unreadable sectors log is full on the destination storage array. Perform steps 2-4.
2	Select the Advanced >> Troubleshooting >> View Event Log pull-down menu option from the Array Management Window (AMW) and look for the following events: Note: If may take several minutes for these events to be logged. Make sure you have the View Details checkbox selected. Internal configuration database - merge failed (event 6006) Virtual Disk import failed - too many unreadable sectors (event 6705)
3	Caution: Risk of Data Loss. Recovery from Unreadable Sectors Log Full is a complicated procedure that can involve several different methods. Therefore, do NOT perform any recovery steps without the help of your technical support representative. Select the Advanced >> Troubleshooting >> Support Data >> Collect menu option from the Array Management Window (AMW), and take the appropriate steps to save the support data to a .zip file.
4	Contact your technical support representative and indicate that your disk group relocation operation failed and that the disk group remains in an Offline state. Send the file you saved in step 3 to your representative and wait for further instruction.
5	Click the Recheck button to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your technical support representative.