Sun Storage 3000 RAID Arrays: RAID-0 Disk Failure Recovery Process

Asset ID:	1-71-1009219.1
Update Date:	2017-06-12
Keywords:

Solution Type Technical Instruction Sure

Solution 1009219.1 : Sun Storage 3000 RAID Arrays: RAID-0 Disk Failure Recovery Process

Applies to:

Sun Storage 3310 Array - Version Not Applicable and later
Sun Storage 3320 SCSI Array - Version Not Applicable and later
Sun Storage 3510 FC Array - Version Not Applicable and later
Sun Storage 3511 SATA Array - Version Not Applicable and later
All Platforms

Goal

This document describes the implications of a disk failure in a RAID-0 logical drive and the steps to address it. The Sun Storage 3000 Array family includes arrays with RAID controllers and also enclosures that are JBODs (Just a Bunch of Disks). This document is relevant only for the following RAID arrays:

Sun Storage 3310
Sun Storage 3320
Sun Storage 3510
Sun Storage 3511

Solution

RAID-0 logical drives have no redundancy. RAID-0 is a reasonable choice for some applications, primarily those where data loss is not a major concern. Because there is no redundancy, a single disk failure will cause the logical drive to become inaccessible. The logical drive status will display as Incomplete.

It is sometimes possible to recover a RAID-0 logical drive by resetting or powercycling the array. This may bring the failed disk back, and the partitions on that logical drive may be accessible, although the condition of the data is not guaranteed.

The normal process to recover a RAID-0 logical drive that has incurred a disk failure and is in the Incomplete status is to remove the logical drive, replace the disk, and recreate the logical drive.

This process requires knowledge of the partitioning of the logical drive, as well as the host Logical Unit Number (LUN) mapping. The host LUN mapping remains intact in a disk failure situation. Use the sccli> show partitions command to view logical drive partitions. Use the sccli> show configuration command or the firmware interface menu to document partition number, size, and host LUN mapping so that they can be recreated.

Follow these steps to remove and recreate a RAID-0 logical drive with a failed disk.

Before deleting the logical drive, all host LUN mapping for this logical drive must be removed. If this information is not recorded elsewhere, write it down at this time, for use in restoring the mapping later on.
Delete the logical drive.
Replace the failed disk.
Recreate the logical drive.
Re-partition the newly created logical drive.
Re-map the partitions.
Restore data to partitions as needed.

Do you still have questions? You can use My Oracle Support Communities. Communities put you in touch with industry professionals like yourself. They are monitored by Oracle support engineers, so you can expect reliable and correct answers. Ask questions and see what others are asking about in the Disk Storage 2000, 3000, 6000 RAID Arrays & JBODs Community.

Previously Published As
79960

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