Veritas Volume Manager 5.0.1 Troubleshooting Guide, HP-UX 11i v3, First Edition, November 2009

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v r5vol - ENABLED DEGRADED 204800 RAID - raid5

pl r5vol-01 r5vol ENABLED ACTIVE 204800 RAID 3/16 RW

sd disk01-01 r5vol-01disk01 0 102400 0/0 c2t9d0 ENA

sd disk02-01 r5vol-01disk02 0 102400 1/0 c2t10d0 dS

sd disk03-01 r5vol-01disk03 0 102400 2/0 c2t11d0 ENA

pl r5vol-02 r5vol ENABLED LOG 1440 CONCAT - RW

sd disk04-01 r5vol-02disk04 0 1440 0 c2t12d0 ENA

pl r5vol-03 r5vol ENABLED LOG 1440 CONCAT - RW

sd disk05-01 r5vol-03disk05 0 1440 0 c2t14d0 ENA

The volume r5vol is in degraded mode, as shown by the volume state, which is

listed as DEGRADED. The failed subdisk is disk02-01, as shown by the MODE flags;

d indicates that the subdisk is detached, and S indicates that the subdisk’s contents

are stale.

Warning: Do not run the vxr5check command on a RAID-5 volume that is in

degraded mode.

A disk containing a RAID-5 log plex can also fail. The failure of a single RAID-5

log plex has no direct effect on the operation of a volume provided that the RAID-5

log is mirrored. However, loss of all RAID-5 log plexes in a volume makes it

vulnerable to a complete failure. In the output of the vxprint -ht command,

failure within a RAID-5 log plex is indicated by the plex state being shown as

BADLOG rather than LOG.

In the following example, the RAID-5 log plex r5vol-02 has failed:

V NAME RVG/VSET/COKSTATE STATE LENGTH READPOL PREFPLEX UTYPE

PL NAME VOLUME KSTATE STATE LENGTH LAYOUT NCOL/WID MODE

SD NAME PLEX DISK DISKOFFS LENGTH [COL/]OFF DEVICE MODE

SV NAME PLEX VOLNAME NVOLLAYR LENGTH [COL/]OFF AM/NM MODE

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v r5vol - ENABLED ACTIVE 204800 RAID - raid5

pl r5vol-01 r5vol ENABLED ACTIVE 204800 RAID 3/16 RW

sd disk01-01 r5vol-01disk01 0 102400 0/0 c2t9d0 ENA

sd disk02-01 r5vol-01disk02 0 102400 1/0 c2t10d0 ENA

sd disk03-01 r5vol-01disk03 0 102400 2/0 c2t11d0 ENA

pl r5vol-02 r5vol DISABLED BADLOG 1440 CONCAT - RW

sd disk04-01 r5vol-02disk04 0 1440 0 c2t12d0 ENA

pl r5vol-03 r5vol ENABLED LOG 1440 CONCAT - RW

sd disk05-01 r5vol-12disk05 0 1440 0 c2t14d0 ENA

Recovering from hardware failure

Failures on RAID-5 volumes