[Ocfs2-users] multipath ocfs2 start by-label missing

[Heiko L.]

> It looks like multipath is not started, or these devices have just one path.  What is tthe output of:
> multipath -v3
> multipath -l


6 hours later:
#  blkid | grep s5r6
/dev/sdb1: LABEL="s5r6l83p1" UUID="b5f5c10d-30bc-455c-8eef-8f08bf71cf54" TYPE="ocfs2"
/dev/sdb2: LABEL="s5r6l83p2" UUID="f6559525-c70b-4cc2-880b-42f854ff563b" TYPE="ocfs2"
/dev/mapper/mpath0-part1: LABEL="s5r6l83p1" UUID="b5f5c10d-30bc-455c-8eef-8f08bf71cf54" TYPE="ocfs2"
/dev/mapper/mpath0-part2: LABEL="s5r6l83p2" UUID="f6559525-c70b-4cc2-880b-42f854ff563b" TYPE="ocfs2"


----------------------------------------------------------
# reboot


# blkid -c /dev/null

# blkid | grep "s5r6"
/dev/sdb1: LABEL="s5r6l83p1" UUID="b5f5c10d-30bc-455c-8eef-8f08bf71cf54" TYPE="ocfs2"
/dev/sdb2: LABEL="s5r6l83p2" UUID="f6559525-c70b-4cc2-880b-42f854ff563b" TYPE="ocfs2"

# /etc/init.d/ocfs2.dis start
Starting Oracle Cluster File System (OCFS2) mount.ocfs2: Device or resource busy while mounting /dev/sdb1 on /mnt/s5r6l83p1.
Check 'dmesg' for more information on this error.
mount.ocfs2: Device or resource busy while mounting /dev/sdb2 on /mnt/s5r6l83p2. Check 'dmesg' for more information on this error.
Failed


# multipath -ll mpath0
mpath0 (3600601602f1027001a3260cead1ce111) dm-2 DGC,VRAID
size=500G features='1 queue_if_no_path' hwhandler='1 emc' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 1:0:0:0 sdb 8:16  active ready running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 1:0:1:0 sde 8:64  active ready running

  - server has 1hba, san has 2connections (EMC SP)

# multipath -v3 | egrep "sdb|sdc|dm-2" | more
Jan 21 22:31:20 | sdb: not found in pathvec
Jan 21 22:31:20 | sdb: mask = 0x1f
Jan 21 22:31:20 | sdb: dev_t = 8:16
Jan 21 22:31:20 | sdb: size = 1048576000
Jan 21 22:31:20 | sdb: subsystem = scsi
Jan 21 22:31:20 | sdb: vendor = DGC
Jan 21 22:31:20 | sdb: product = VRAID
Jan 21 22:31:20 | sdb: rev = 0430
Jan 21 22:31:20 | sdb: h:b:t:l = 1:0:0:0
Jan 21 22:31:20 | sdb: tgt_node_name = 0x50060160c460267
Jan 21 22:31:20 | sdb: serial = CKM00094900180
Jan 21 22:31:20 | sdb: get_state
Jan 21 22:31:20 | sdb: path checker = emc_clariion (controller setting)
Jan 21 22:31:20 | sdb: state = running
Jan 21 22:31:20 | sdb: state = 3
Jan 21 22:31:20 | sdb: prio = emc (controller setting)
Jan 21 22:31:20 | sdb: emc prio = 1
Jan 21 22:31:20 | sdb: getuid = /lib/udev/scsi_id --whitelisted --device=/dev/%n (controller setting)
Jan 21 22:31:20 | sdb: uid = 3600601602f1027001a3260cead1ce111 (callout)
Jan 21 22:31:20 | sdc: not found in pathvec
Jan 21 22:31:20 | sdc: mask = 0x1f
Jan 21 22:31:20 | sdc: dev_t = 8:32
Jan 21 22:31:20 | sdc: size = 2124131200
Jan 21 22:31:20 | sdc: subsystem = scsi
Jan 21 22:31:20 | sdc: vendor = DGC
Jan 21 22:31:20 | sdc: product = VRAID
Jan 21 22:31:20 | sdc: rev = 0430
Jan 21 22:31:20 | sdc: h:b:t:l = 1:0:0:1
Jan 21 22:31:20 | sdc: tgt_node_name = 0x50060160c460267
Jan 21 22:31:20 | sdc: serial = CKM00094900180
Jan 21 22:31:20 | sdc: get_state
Jan 21 22:31:20 | sdc: path checker = emc_clariion (controller setting)
Jan 21 22:31:20 | sdc: state = running
Jan 21 22:31:20 | sdc: state = 3
Jan 21 22:31:20 | sdc: prio = emc (controller setting)
Jan 21 22:31:20 | sdc: emc prio = 0
Jan 21 22:31:20 | sdc: getuid = /lib/udev/scsi_id --whitelisted --device=/dev/%n (controller setting)
Jan 21 22:31:20 | sdc: uid = 3600601602f102700a045a69c22bfdf11 (callout)
Jan 21 22:31:20 | dm-2: device node name blacklisted
3600601602f1027001a3260cead1ce111 1:0:0:0 sdb 8:16  1   undef ready  DGC,VRAID
3600601602f102700a045a69c22bfdf11 1:0:0:1 sdc 8:32  0   undef ready  DGC,VRAID

regards Heiko