[dm-devel] how to troubleshoot faulty multipath path?

Rudy Gevaert Rudy.Gevaert at UGent.be
Sat Dec 17 10:34:50 UTC 2011


Hello Mr Moger,

Quoting "Moger, Babu" <Babu.Moger at netapp.com>:

> My initial guess is, there could be problem with your configuration.
> Can you paste output of "multipath -ll".  How does your multipath.conf
> look like.  Can you paste that as well.
> You messages file might help also.

I have attached the output of multipath -ll.  My multipath.conf only  
has some aliases defined, so I didn't attach that.  I'm using the  
default config.

I've grepped through the messages, dmesg and kern.log files.  I have  
attached them.  (Adding the full files isn't possible they have other  
application level output too.)

I forgot to mention, I'm using 0.4.8+git0.761c66f-9 of  
multipath-tools. (Debian stable)

Thanks in advance!


-- 
  -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
  Rudy Gevaert                             e-mail: Rudy.Gevaert at UGent.be
  Directie ICT, Afdeling Infrastructuur
  Groep Systemen                                      tel: +32 9 264 4750
  Universiteit Gent                                   fax: +32 9 264 4994
  Krijgslaan 281, gebouw S9, 9000 Gent, Belgie               www.UGent.be
  -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-------------- next part --------------
[1850209.907285] device-mapper: ioctl: unable to remove open device mailstore21
[1850569.600287] device-mapper: ioctl: unable to remove open device mailstore21
[1850892.506649] device-mapper: ioctl: unable to remove open device mailstore21
[1851106.061424] device-mapper: ioctl: device doesn't appear to be in the dev hash table.
[4895914.569949] device-mapper: table: 253:31: multipath: error getting device
[4895914.569989] device-mapper: ioctl: error adding target to table
[4895914.590736] device-mapper: table: 253:31: multipath: error getting device
[4895914.590776] device-mapper: ioctl: error adding target to table
[4896672.904187] device-mapper: table: 253:31: multipath: error getting device
[4896672.904226] device-mapper: ioctl: error adding target to table
[4896672.915275] device-mapper: table: 253:31: multipath: error getting device
[4896672.915311] device-mapper: ioctl: error adding target to table
[4896999.249946] device-mapper: table: 253:31: multipath: error getting device
[4896999.249985] device-mapper: ioctl: error adding target to table
[4896999.289079] device-mapper: table: 253:31: multipath: error getting device
[4896999.289116] device-mapper: ioctl: error adding target to table
-------------- next part --------------
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messages:Dec 16 16:20:13 cyrprd2 kernel: [4895914.569989] device-mapper: ioctl: error adding target to table
messages:Dec 16 16:20:13 cyrprd2 kernel: [4895914.590776] device-mapper: ioctl: error adding target to table
messages:Dec 16 16:32:53 cyrprd2 kernel: [4896672.904226] device-mapper: ioctl: error adding target to table
messages:Dec 16 16:32:53 cyrprd2 kernel: [4896672.915311] device-mapper: ioctl: error adding target to table
messages:Dec 16 16:38:20 cyrprd2 kernel: [4896999.249985] device-mapper: ioctl: error adding target to table
messages:Dec 16 16:38:20 cyrprd2 kernel: [4896999.289116] device-mapper: ioctl: error adding target to table
-------------- next part --------------
mail17r-ds3400-1 (3600a0b80005a67b6000004764cac4912) dm-8 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 5:0:0:17 sdx  65:112 active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 1:0:0:17 sdj  8:144  active ghost  running
mail13-ds3400-1 (3600a0b80005a67b60000046f4cac471e) dm-4 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 5:0:0:13 sdt  65:48  active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 1:0:0:13 sdf  8:80   active ghost  running
mail19r-ds3400-1 (3600a0b80005a67b6000004744cac48bd) dm-10 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 5:0:0:19 sdz  65:144 active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 1:0:0:19 sdl  8:176  active ghost  running
mail12-ds3400-1 (3600a0b80005a591a0000042d4cac4753) dm-3 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:12 sde  8:64   active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:12 sds  65:32  active ghost  running
mail11-ds3400-1 (3600a0b80005a591a0000042b4cac46de) dm-2 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=0 status=enabled
| `- 1:0:0:11 sdd  8:48   active faulty running
`-+- policy='round-robin 0' prio=3 status=active
  `- 5:0:0:11 sdr  65:16  active ready  running
mail10-ds3400-1 (3600a0b80005a67b60000046a4cac4613) dm-1 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=0 status=enabled
| `- 5:0:0:10 sdq  65:0   active faulty running
`-+- policy='round-robin 0' prio=3 status=active
  `- 1:0:0:10 sdc  8:32   active ready  running
mail14r-ds3400-1 (3600a0b80005a591a000004294cac468b) dm-5 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:14 sdg  8:96   active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:14 sdu  65:64  active ghost  running
mail8-ds3400-1 (3600a0b80005a591a000004264cac464b) dm-0 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:8  sdb  8:16   active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:8  sdp  8:240  active ghost  running
mail16r-ds3400-1 (3600a0b80005a591a000004304cac47f7) dm-7 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:16 sdi  8:128  active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:16 sdw  65:96  active ghost  running
mail22r-ds3400-1 (3600a0b80005a591a000004374cac49dd) dm-13 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:22 sdo  8:224  active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:22 sdac 65:192 active ghost  running
mail18r-ds3400-1 (3600a0b80005a591a000004324cac4953) dm-9 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:18 sdk  8:160  active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:18 sdy  65:128 active ghost  running
mail21-ds3400-1 (3600a0b80005a67b6000004714cac4771) dm-12 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 5:0:0:21 sdab 65:176 active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 1:0:0:21 sdn  8:208  active ghost  running
mail20-ds3400-1 (3600a0b80005a591a000004344cac49a6) dm-11 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| `- 1:0:0:20 sdm  8:192  active ready  running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 5:0:0:20 sdaa 65:160 active ghost  running
mail15r-ds3400-1 (3600a0b80005a67b60000046d4cac464f) dm-6 IBM,1726-4xx  FAStT
size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=0 status=enabled
| `- 5:0:0:15 sdv  65:80  active faulty running
`-+- policy='round-robin 0' prio=3 status=active
  `- 1:0:0:15 sdh  8:112  active ready  running


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