You can try stopping (/etc/init.d/multipathd
stop) and re-starting ((/etc/init.d/multipathd start) the multipathd daemon
again.
From:
dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx] On Behalf Of Greg Cockburn
Sent: Monday, October 20, 2008
5:29 AM
To: dm-devel@xxxxxxxxxx
Subject: multipath rdac
- recover from both paths lost
Hi,
I am trying to get back from a strage situation.
I have had both paths in a RDAC setup fail and then come back.
I want to know if there is a way to recover from this without a reboot.
(OS = CentOS 5.1)
multipath -ll
mpath2 (3600a0b800035ebc8000001a94652ae50) dm-4 IBM,1726-4xx FAStT
[size=1.4T][features=0][hwhandler=1 rdac]
\_ round-robin 0 [prio=0][enabled]
\_ 2:0:0:1 sde 8:80 [failed][ghost]
\_ round-robin 0 [prio=100][active]
\_ 1:0:0:1 sdf 8:96 [failed][ready]
dmsetup info mpath2
Name:
mpath2
State:
ACTIVE
Tables present: LIVE
Open count: 20
Event number: 3
Major, minor: 253, 4
Number of targets: 1
UUID: mpath-3600a0b800035ebc8000001a94652ae50
vgscan
Reading all physical volumes. This may take a while...
/dev/mapper/mpath2: read failed after 0 of 4096 at 1497314033664:
Input/output error
/dev/mapper/mpath2: read failed after 0 of 4096 at 0: Input/output error
dmsetup remove --force mpath2
device-mapper: remove ioctl failed: Device or resource busy
Command failed
multipath -f mpath2 (just exits with return code 1)
dmesg
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6
sde: Current: sense key: Recovered Error
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6
sdf: Current: sense key: Recovered Error
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6
end_request: I/O error, dev sdf, sector 61118720
device-mapper: multipath: Failing path 8:80.
end_request: I/O error, dev sdf, sector 599510512
device-mapper: ioctl: unable to remove open device mpath2
device-mapper: ioctl: unable to remove open device mpath2
Any advice would be greatly appreciated.
Thanks,
Greg.
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