VERITAS Volume Manager 3.1 Administrator's Guide

Recovery
Failures and RAID-5 Volumes
Chapter 8 371
plr5vol-03r5volENABLEDLOG1440CONCAT-RW
sddisk05-01r5vol-03disk05014400c2t14d0ENA
The volume r5vol is in degraded mode, as shown by the volume STATE,
which is listed as DEGRADED. The failed subdisk is disk01-00, as
shown by the flags in the last column; the d indicates that the subdisk is
detached and the S indicates that the subdisk contents are stale.
A disk containing a RAID-5 log can have a failure. This has no direct
effect on the operation of thevolume. However, the loss of all RAID-5 logs
on a volume makes the volume 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 BADLOG. This is shown in the
following display, where the RAID-5 log plex r5vol-l1 has failed:
VNAMERVGKSTATESTATELENGTHUSETYPEPREFPLEXRDPOL
PLNAMEVOLUMEKSTATESTATELENGTHLAYOUTNCOL/WIDMODE
SDNAMEPLEXDISKDISKOFFSLENGTH[COL/]OFFDEVICEMODE
vr5volRAID-5ENABLEDACTIVE20480RAID-
plr5vol-01r5volENABLEDACTIVE20480RAID3/16RW
sddisk00-00r5vol-01disk000102400/0c1t4d1ENA
sddisk01-00r5vol-01disk010102401/0c1t2d1dS
sddisk02-00r5vol-01disk020102402/0c1t3d1ENA
plr5vol-11r5volDISABLEDBADLOG1024CONCAT-RW
sddisk03-01r5vol-11disk001024010240c1t3d0ENA
plr5vol-12r5volENABLEDLOG10240-RW
sddisk04-01r5vol-12disk021024010240c1t1d1ENA