## Logical drive states

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#### Blocked logical drive

During a rebuild operation, the ServeRAID controller sets the state of any RAID level-0 logical drives associated with a failed array to the blocked state; then, it reconstructs the data that was stored in RAID level-1 and RAID level-5 logical drives.

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

#### Critical logical drive

A RAID level-1 or RAID level-5 logical drive that contains a defunct physical drive is in the critical state. A critical logical drive is accessible, despite a physical drive failure.

If the state of the logical drive is critical, you must replace and rebuild the defunct drive.

#### Critical migrating logical drive

A logical drive undergoing a logical-drive migration is in the critical state.

#### Critical system logical drive

The ServeRAID controller uses this reserved state during a logical-drive migration and the logical drive is in the critical state.

#### Migrating logical drive

A logical drive undergoing a logical-drive migration is in the okay state.

#### Offline logical drive

The logical drive is offline and not accessible. This state occurs if one or more physical drives in a RAID level-0 logical drive are defunct. This state also occurs when two or more physical drives in a RAID level-1 or RAID level-5 logical drive are defunct.

#### Okay logical drive

The drive is okay. It is in a good, functional state.

#### System logical drive

The ServeRAID controller uses this reserved state during logical-drive migration.