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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You can try stopping (/etc/init.d/multipathd
stop) and re-starting ((/etc/init.d/multipathd start) the multipathd daemon
again. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Babu Moger </span></font><o:p></o:p></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
dm-devel-bounces@redhat.com [mailto:dm-devel-bounces@redhat.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Greg Cockburn<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 20, 2008
5:29 AM<br>
<b><span style='font-weight:bold'>To:</span></b> dm-devel@redhat.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [dm-devel] multipath rdac
- recover from both paths lost</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi,<br>
<br>
I am trying to get back from a strage situation.<br>
<br>
I have had both paths in a RDAC setup fail and then come back.<br>
<br>
I want to know if there is a way to recover from this without a reboot.<br>
<br>
(OS = CentOS 5.1)<br>
<br>
multipath -ll<br>
mpath2 (3600a0b800035ebc8000001a94652ae50) dm-4 IBM,1726-4xx FAStT<br>
[size=1.4T][features=0][hwhandler=1 rdac]<br>
\_ round-robin 0 [prio=0][enabled]<br>
\_ 2:0:0:1 sde 8:80 [failed][ghost]<br>
\_ round-robin 0 [prio=100][active]<br>
\_ 1:0:0:1 sdf 8:96 [failed][ready]<br>
<br>
dmsetup info mpath2<br>
Name:
mpath2<br>
State:
ACTIVE<br>
Tables present: LIVE<br>
Open count: 20<br>
Event number: 3<br>
Major, minor: 253, 4<br>
Number of targets: 1<br>
UUID: mpath-3600a0b800035ebc8000001a94652ae50<br>
<br>
vgscan<br>
Reading all physical volumes. This may take a while...<br>
/dev/mapper/mpath2: read failed after 0 of 4096 at 1497314033664:
Input/output error<br>
/dev/mapper/mpath2: read failed after 0 of 4096 at 0: Input/output error<br>
<br>
dmsetup remove --force mpath2<br>
<br>
<br>
<br>
device-mapper: remove ioctl failed: Device or resource busy<br>
Command failed<br>
<br>
multipath -f mpath2 (just exits with return code 1)<br>
<br>
<br>
dmesg<br>
<br>
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6<br>
<br>
sde: Current: sense key: Recovered Error<br>
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6<br>
<br>
sdf: Current: sense key: Recovered Error<br>
<<vendor>> ASC=0xe0 ASCQ=0x6ASC=0xe0 ASCQ=0x6<br>
<br>
end_request: I/O error, dev sdf, sector 61118720<br>
device-mapper: multipath: Failing path 8:80.<br>
end_request: I/O error, dev sdf, sector 599510512<br>
<br>
device-mapper: ioctl: unable to remove open device mpath2<br>
device-mapper: ioctl: unable to remove open device mpath2<br>
<br>
Any advice would be greatly appreciated.<br>
<br>
Thanks,<br>
Greg.<o:p></o:p></span></font></p>
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