Hi all,
I am trying to setup our server so that we have fabric failover from
the san. However my file sytem comes up read-only when I pull a cable
for testing.
I am using the following:
SLES 10
multipath-tools-0.4.6-25.8
q-logic 2342 dual port hba
emc cx600 san
(4) McData DS-24 switches (2 for fabric a and 2 for fabric b)
I have one port from the hba plugged into fabric a and the other
plugged into fabric b.
multipath -v2 -d before failover gives the following:
xen2:~ # multipath -v2 -d
create: SSEAGATE_ST973401LSUN72G0910FQL9_3LB0FQL9SEAGATE,ST973401LSUN72G
[size=68G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][undef]
\_ 0:2:0:0 sda 8:0 [undef][ready]
SSEAGATE_ST973401LSUN72G0910FPHE_3LB0FPHESEAGATE,ST973401LSUN72G
[size=68G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][undef]
\_ 0:3:1:0 sdb 8:16 [active][ready]
capsprod (360060160f06109004352b218eb51da11) DGC,RAID 5
[size=50G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=1][undef]
\_ 1:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=1][undef]
\_ 1:0:1:0 sde 8:64 [active][ready]
360060160f0610900ea604e9d2412db11DGC,RAID 5
[size=58G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][undef]
\_ 1:0:0:1 sdd 8:48 [active][ready]
\_ 1:0:1:1 sdf 8:80 [active][ready]
capsprod (360060160f06109004352b218eb51da11) DGC,RAID 5
[size=50G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=1][undef]
\_ 1:0:0:0 sdc 8:32 [undef][ready]
\_ round-robin 0 [prio=1][undef]
\_ 1:0:1:0 sde 8:64 [undef][ready]
360060160f0610900ea604e9d2412db11DGC,RAID 5
[size=58G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=2][undef]
\_ 1:0:0:1 sdd 8:48 [undef][ready]
\_ 1:0:1:1 sdf 8:80 [undef][ready]
The disc that I'm using for test has the alias capsprod.
When I pull the cable from fabric a multipath -v2 -d gives:
xen2:~ # multipath -v2 -d
sdc: checker msg is "emc_clariion_checker: query command indicates
error"
error calling out /sbin/scsi_id -g -u -s /block/sdc
sdd: checker msg is "emc_clariion_checker: query command indicates
error"
error calling out /sbin/scsi_id -g -u -s /block/sdd
sde: checker msg is "emc_clariion_checker: query command indicates
error"
error calling out /sbin/scsi_id -g -u -s /block/sde
sdf: checker msg is "emc_clariion_checker: query command indicates
error"
error calling out /sbin/scsi_id -g -u -s /block/sdf
create: SSEAGATE_ST973401LSUN72G0910FQL9_3LB0FQL9SEAGATE,ST973401LSUN72G
[size=68G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][undef]
\_ 0:2:0:0 sda 8:0 [undef][ready]
SSEAGATE_ST973401LSUN72G0910FPHE_3LB0FPHESEAGATE,ST973401LSUN72G
[size=68G][features=0][hwhandler=0]
\_ round-robin 0 [prio=0][undef]
\_ 0:3:1:0 sdb 8:16 [active][ready]
sdc: checker msg is "emc_clariion_checker: query command indicates
error"
sde: checker msg is "emc_clariion_checker: query command indicates
error"
capsprod (360060160f06109004352b218eb51da11) DGC,RAID 5
[size=50G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:0:0 sdc 8:32 [failed][faulty]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:1:0 sde 8:64 [failed][faulty]
sdd: checker msg is "emc_clariion_checker: query command indicates
error"
sdf: checker msg is "emc_clariion_checker: query command indicates
error"
360060160f0610900ea604e9d2412db11DGC,RAID 5
[size=58G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:0:1 sdd 8:48 [failed][faulty]
\_ 1:0:1:1 sdf 8:80 [failed][faulty]
sdc: checker msg is "emc_clariion_checker: query command indicates
error"
sde: checker msg is "emc_clariion_checker: query command indicates
error"
capsprod (360060160f06109004352b218eb51da11) DGC,RAID 5
[size=50G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:0:0 sdc 8:32 [undef][faulty]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:1:0 sde 8:64 [undef][faulty]
sdd: checker msg is "emc_clariion_checker: query command indicates
error"
sdf: checker msg is "emc_clariion_checker: query command indicates
error"
360060160f0610900ea604e9d2412db11DGC,RAID 5
[size=58G][features=1 queue_if_no_path][hwhandler=1 emc]
\_ round-robin 0 [prio=0][undef]
\_ 1:0:0:1 sdd 8:48 [undef][faulty]
\_ 1:0:1:1 sdf 8:80 [undef][faulty]
/etc/multipath.conf has the following entries:
xen2:~ # grep -v "#" /etc/multipath.conf
defaults {
udev_dir /dev
polling_interval 10
selector "round-robin 0"
getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
prio_callout /bin/true
failback immediate
}
devnode_blacklist {
device {
vendor SEAGATE
product ST973401LSUN72G
}
}
multipaths {
multipath {
wwid 360060160f06109004352b218eb51da11
alias capsprod
path_grouping_policy failover
path_checker readsector0
path_selector "round-robin 0"
failback immediate
}
}
Can someone point me in the right direction to get this resolved?
Best regards,
John Little, Network Systems
Hendricks Regional Health
http://hendrickshospital.org
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