Troubleshooting
Problem
This section provides descriptions of the physical and logical drive states for servers and IntelliStations.
Resolving The Problem
This document provides descriptions of the physical and logical drive states for the IBM ServeRAID family of controllers.
| Physical drive state descriptions |
|---|
The following table provides descriptions of the valid physical drive states.
|
Drive State
|
Meaning
|
|---|---|
|
Defunct (Defunct Disk Drive = DDD) |
A physical drive in the online, hot-spare, or rebuild state has become defunct. It does not respond to commands, which means that the ServeRAID controller cannot communicate properly with the drive. |
| Hot spare | A hot-spare drive is a physical drive that is defined for automatic use when a similar drive fails. |
| Online | The drive is online. It is functioning properly and is part of an array. |
| Rebuilding |
The drive is being rebuilt. |
| Ready | The ServeRAID controller recognizes a ready drive as being available for definition. |
| Standby Hot Spare | A standby hot spare is a hot-spare drive that the ServeRAID controller has spun down. If an online drive becomes defunct and no suitable hot-spare drive is available, a standby hot-spare drive of the appropriate size automatically spins up, and enters the rebuild state. |
| Logical drive state descriptions |
|---|
The following table provides descriptions of the valid logical drive states.
|
Drive State
|
Meaning
|
|---|---|
| Blocked |
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, RAID level-1E, RAID level-5 and RAID level-5E 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 damaged data. You must either re-create, reinstall, or restore the data from the most recent backup disk or tape to the RAID level-0 logical drive. |
| Critical Migrating | A logical drive in the critical state that is undergoing a logical drive migration (LDM). |
| Critical System | The ServeRAID controller uses this reserved state during a logical drive migration (LDM) when the logical drive is in the critical state. |
| Critical |
A RAID level-1, RAID level-1E, RAID level-5, or RAID level-5E logical drive that contains a defunct physical drive is in the critical state. A critical logical drive is accessible, despite a physical drive failure. Note: If the state of the logical drive is critical, refer to Drive replacement (rebuilding a defunct drive). |
| Migrating | The logical drive is undergoing a logical drive migration; that is, a change in RAID levels, a change in logical drive size, an increase in free space, or a RAID level-5E compression or decompression. |
| Offline |
The logical drive is offline and not accessible. This state occurs when one of the following is true.
Note: If any of these are true, refer to Drive replacement (rebuilding a defunct drive). |
| Okay | The logical drive is okay. It is in a good, functional state. |
| System | The ServeRAID controller uses this reserved state during logical drive migration (LDM). |
| Need more help? |
|---|
 |
Contact your local technical Support Center |
 |
Return to the main Troubleshooting page |
Document Location
Worldwide
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Document Information
Modified date:
23 January 2019
UID
ibm1MIGR-4R6MXK