I wanted to remove a mirror of two disk, c2t0d0, and c4t0d0.
After removing the plex and the disk this was the status:
# vxprint -g ogw1dg
TY NAME ASSOC KSTATE LENGTH PLOFFS STATE TUTIL0 PUTIL0
dg ogw1dg ogw1dg - - - - - -
dm ogw1dgc2t0d0 c4t0d0s2 - 142831616 - - - -
v vol01 fsgen ENABLED 142831616 - ACTIVE - -
pl vol01-01 vol01 ENABLED 142831616 - ACTIVE - -
sd ogw1dgc2t0d0-01 vol01-01 ENABLED 142831616 0 - - -
#
when unsetupping c2t0d0
# /etc/vx/bin/vxdiskunsetup -C c2t0d0
First error was:
Jun 11 00:46:00 OGW2 vxio: WARNING: VxVM vxio V-5-0-2 Subdisk ogw1dgc2t0d0-01 block 196608: Uncorrectable write error
I also found this error in dmpevents.log, for dynamic multipathing
root@OGW2:/etc/vx/log# head dmpevents.log
------LOGGING START------------LOGGING START------
Thu Jun 11 00:46:00.167: I/O error occured on Path c2t0d0s2 belonging to Dmpnode c4t0d0s2
Thu Jun 11 00:46:00.172: I/O analysis done on Path c2t0d0s2 belonging to Dmpnode c4t0d0s2
Is it possible that Veritas was accessing to c4t0d0 trought c2t0d0???. According to "vxdisk list c4t0d0" there is only one path defined and it is c2t0d0. So when c2t0d0 was unsetupped, Veritas could not reach c4t0d0???
root@OGW2:/# vxdisk list c4t0d0
Device: c4t0d0s2
devicetag: c4t0d0
type: auto
hostid: OGW1
disk: name= id=1244812456.121.OGW2
group: name=ogw1dg id=1244812625.127.OGW2
info: format=cdsdisk,privoffset=256,pubslice=2,privslice=2
flags: online ready private autoconfig noautoimport
pubpaths: block=/dev/vx/dmp/c4t0d0s2 char=/dev/vx/rdmp/c4t0d0s2
version: 3.1
iosize: min=512 (bytes) max=2048 (blocks)
public: slice=2 offset=2304 len=142837504 disk_offset=0
private: slice=2 offset=256 len=2048 disk_offset=0
update: time=1245065729 seqno=0.47
ssb: actual_seqno=0.0
headers: 0 240
configs: count=1 len=1280
logs: count=1 len=192
Defined regions:
config priv 000048-000239[000192]: copy=01 offset=000000 enabled
config priv 000256-001343[001088]: copy=01 offset=000192 enabled
log priv 001344-001535[000192]: copy=01 offset=000000 enabled
lockrgn priv 001536-001679[000144]: part=00 offset=000000
Multipathing information:
numpaths: 1
c2t0d0s2 state=enabled
root@OGW2:/#
