Promise Technology Pegasus32 R4, Product Manual

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Troubleshooting Pegasus32 Product Manual
Disk Array and Logical Drive Problems
Disk array and logical drive troubleshooting includes:
• “Disk Array Degraded / Logical Drive Critical”
• “Disk Array Offline / Logical Drive Offline”
• “Repairing an Offline Disk Array or Logical Drive”
• “Rebuilding a Disk Array”
• “Incomplete Array”
• “Unreadable Disk Warning”
Disk array problems typically result from a physical drive failure. The most common problem is a
degraded disk array. The RAID controller can rebuild a degraded disk array. See “Rebuilding a Disk
Array” on page 195.
Disk Array Degraded / Logical Drive Critical
Disk arrays are made up of physical drives. Logical drives are created on the disk array.
When one of the physical drives in a disk array fails:
• The operational status of the disk array becomes Critical .
• The operational status of the logical drives becomes Critical or Degraded .
• The operational status of the physical drive becomes Dead or Offline . The Pegasus Utility reports
these conditions in the following places:
• Dashboard icon – A yellow ! icon beside the disk arrays, logical drives, and physical drives
under System Status.
• Physical Drive icon – Physical drives are shown Dead or Offline and marked with a red X icon,
or Missing.
• Logical Drive icon – Disk Array and Logical Drive are marked Critical with a yellow ! icon.
RAID 6 logical drives are marked:
• Degraded with a yellow ! icon when ONE physical drive is offline.
• Critical with a yellow ! icon when TWO physical drives are offline. RAID 0 logical
drives show Offline status and a red X icon.
• Events icon – Logs a Major event for the logical drives and a Warning event for the physical drive.
If there is no spare drive in the Pegasus unit, you must provide the replacement drive. See “Replacing a
Physical Drive” on page 189.