## Unblocking a logical drive

When the ServeRAID controller performs a rebuild operation on an array, it reconstructs the data that was stored in RAID level-1 and RAID level-5 logical drives. However, the ServeRAID controller cannot reconstruct the data that was stored in any RAID level-0 logical drives in that array. The data in the RAID level-0 logical drives is blocked when the ServeRAID controller detects that the array is valid, but the data might be damaged.

After the rebuild operation completes, you can unblock the RAID level-0 logical drives and access them once again. But remember, the logical drive might contain damaged data. You must either re-create, install, or restore the data from the most recent backup disk or tape.

To unblock a blocked drive:

1. Click the blocked logical drive from the Main Tree.
2. Click Actions --> Unblock logical drive.
3. Click Yes, understanding that the data on the logical drive is not valid. The ServeRAID Manager unblocks the blocked logical drive.
4. Initialize all unblocked logical drives before using them. For more information, refer to initializing logical drives.
5. Restore the data to the drive from your most recent backup disk or tape.