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Sun Storage 3000 Arrays: How to Resolve the Degraded Status of a Redundant (RAID-5 or RAID-1) Logical Drive (Doc ID 1601641.1)

Last updated on SEPTEMBER 19, 2017

Applies to:

Sun Storage 3511 SATA Array - Version Not Applicable and later
Sun Storage 3320 SCSI Array - Version Not Applicable and later
Sun Storage 3310 SCSI Array - Version Not Applicable and later
Sun Storage 3510 FC Array - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

This document provides the procedure to return a DEGRADED logical drive, on a Sun Storage 3310, 3320, 3510 or 3511 Array, to a GOOD status. The information in this document is primarily for arrays running 3.x firmware, but may be used on a 4.x array assuming the initial set of conditions are identical.  Normally, for arrays running 4.x firmware, you should follow the procedures in  "Rebuilding a Logical Drive" from the Sun StorEdgeTM 3000 Family RAID Firmware 4.2x User’s Guide.

CAUTION: This procedure is to be used only when a logical drive is in the DEGRADED status and if there is no spare drive is ready for logical drive rebuild. It should not be used when the logical drive is in the DEAD status. Using this procedure for a dead logical drive may result in lost data.

The problem will reveal itself with the data collected from the sccli interface. In this example, you can see two Degraded RAID-5 Logical Drives.  show logical-drives lets us know there is a failed disk in each LD. show disks lets us know what the two good disks are.  However, there is nothing reported that lets us know which disks have failed.


sccli> show disks
Ch     Id      Size   Speed  LD     Status     IDs                      Rev
----------------------------------------------------------------------------
 2(3)   0  136.73GB   200MB  NONE    USED     SEAGATE ST314680FSUN146G 0207
                                                   S/N 3HY065RD00007308
                                                  WWNN 20000004CF564B0F
 2(3)   1  136.73GB   200MB  ld0    ONLINE     SEAGATE ST314680FSUN146G 0207
                                                   S/N 3HY0CGR100007328
                                                  WWNN 20000004CFD8E546
 2(3)   2  136.73GB   200MB  ld0    ONLINE     SEAGATE ST314680FSUN146G 0307
                                                   S/N 3HY0DY4100007328
                                                  WWNN 20000004CFD8E21C
 2(3)   3  136.73GB   200MB  NONE    USED      SEAGATE ST314680FSUN146G 0207
                                                   S/N 3HY0DYZT00007327
                                                  WWNN 20000004CFD8DF4A
 2(3)   4  136.73GB   200MB  ld1    ONLINE     SEAGATE ST314680FSUN146G 0307
                                                   S/N 3HY0DYNF00007327
                                                  WWNN 20000004CFD8DF88
 2(3)   5  136.73GB   200MB  ld1    ONLINE     SEAGATE ST314680FSUN146G 0307
                                                   S/N 3HY0DX3N00007328
                                                  WWNN 20000004CFD8E010

sccli> show logical-drives
LD    LD-ID        Size  Assigned  Type   Disks Spare  Failed Status
------------------------------------------------------------------------
ld0   66EAFEB0   8.00GB  Primary   RAID5  2     0      1    Degraded
                         Write-Policy Default          StripeSize 128KB
ld1   39FCC1C4  15.65GB  Primary   RAID5  2     0      1    Degraded
                         Write-Policy Default          StripeSize 128KB


 

Changes

There have been no changes per se.  The problem manifests itself via a series of events on the array.  The event logs may show some disk failures, drive channel failures, loop initialization's (LIP's), usually followed by a controller reset.  The timing and combination of these Events is unknown. However, when the array comes back online, the result is a Degraded Logical Drive with no associated failed disks.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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