Missing path

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* Missing path
@ 2008-03-11 13:53 Domenico Viggiani
  2008-03-11 14:10 ` Simone Gotti
  2008-03-11 14:15 ` Chandra Seetharaman
  0 siblings, 2 replies; 4+ messages in thread
From: Domenico Viggiani @ 2008-03-11 13:53 UTC (permalink / raw)
  To: 'device-mapper development'

After adding a LUN from a EMC Clariion CX700 to a system with already many
of these, I noticed that multipath doesn't see a path:

360060160eb241700284f88a159efdc11
[size=450 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [prio=1][enabled]
 \_ 1:0:0:70  sdbo 68:32  [active][ready]
\_ round-robin 0 [enabled]
 \_ 0:0:3:70  sdbn 68:16  [active][ready]
 \_ 1:0:1:70  sdbp 68:48  [active][ready]

From SCSI layer, it is OK:

Host: scsi0 Channel: 00 Id: 02 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi0 Channel: 00 Id: 03 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi1 Channel: 00 Id: 00 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi1 Channel: 00 Id: 01 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04

but one device is missing under /dev:

brw-rw----  1 root disk 68,  16 Mar 11 14:44 /dev/sdbn
brw-rw----  1 root disk 68,  32 Mar 11 14:45 /dev/sdbo
brw-rw----  1 root disk 68,  48 Mar 11 14:45 /dev/sdbp

How can I fix this?

Thanks in advance
-- 
Domenico Viggiani

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: Missing path
  2008-03-11 13:53 Missing path Domenico Viggiani
@ 2008-03-11 14:10 ` Simone Gotti
  2008-03-11 14:24   ` Domenico Viggiani
  2008-03-11 14:15 ` Chandra Seetharaman
  1 sibling, 1 reply; 4+ messages in thread
From: Simone Gotti @ 2008-03-11 14:10 UTC (permalink / raw)
  To: device-mapper development


[-- Attachment #1.1: Type: text/plain, Size: 1928 bytes --]

Hi,

On Tue, 2008-03-11 at 14:53 +0100, Domenico Viggiani wrote:
> After adding a LUN from a EMC Clariion CX700 to a system with already many
> of these, I noticed that multipath doesn't see a path:
> 
> 360060160eb241700284f88a159efdc11
> [size=450 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
> \_ round-robin 0 [prio=1][enabled]
>  \_ 1:0:0:70  sdbo 68:32  [active][ready]
> \_ round-robin 0 [enabled]
>  \_ 0:0:3:70  sdbn 68:16  [active][ready]
>  \_ 1:0:1:70  sdbp 68:48  [active][ready]
> 
> >From SCSI layer, it is OK:
> 
> Host: scsi0 Channel: 00 Id: 02 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi0 Channel: 00 Id: 03 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi1 Channel: 00 Id: 00 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi1 Channel: 00 Id: 01 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> 
> but one device is missing under /dev:
> 
> brw-rw----  1 root disk 68,  16 Mar 11 14:44 /dev/sdbn
> brw-rw----  1 root disk 68,  32 Mar 11 14:45 /dev/sdbo
> brw-rw----  1 root disk 68,  48 Mar 11 14:45 /dev/sdbp
> 
> How can I fix this?


In RHEL4 until U5 there was a bug which caused the device with
major:minor=68:0 to be missing due to a too strong wrong udev rule for
capi devices:

https://bugzilla.redhat.com/show_bug.cgi?id=234170
duplicate of
https://bugzilla.redhat.com/show_bug.cgi?id=202792

http://rhn.redhat.com/errata/RHBA-2007-0784.html

Looking at your device names looks like the same.

I hope this helps.

Bye!

> 
> Thanks in advance
-- 
Simone Gotti

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^ permalink raw reply	[flat|nested] 4+ messages in thread

* RE: Missing path
  2008-03-11 14:10 ` Simone Gotti
@ 2008-03-11 14:24   ` Domenico Viggiani
  0 siblings, 0 replies; 4+ messages in thread
From: Domenico Viggiani @ 2008-03-11 14:24 UTC (permalink / raw)
  To: 'device-mapper development'

> From: dm-devel-bounces@redhat.com 
> [mailto:dm-devel-bounces@redhat.com] On Behalf Of Simone Gotti
> Sent: Tuesday, March 11, 2008 3:11 PM
>
> In RHEL4 until U5 there was a bug which caused the device 
> with major:minor=68:0 to be missing due to a too strong wrong 
> udev rule for capi devices:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=234170
> duplicate of
> https://bugzilla.redhat.com/show_bug.cgi?id=202792
> 
> http://rhn.redhat.com/errata/RHBA-2007-0784.html
> 
> Looking at your device names looks like the same.
> 
> I hope this helps.

It's the second time that this list saves me (first one was the infamous
issue with /var/lib/multipath/bindings file under a different filesystem
from /).

I hope to be able to return someday.

Thanks thanks thanks
--
Domenico Viggiani

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: Missing path
  2008-03-11 13:53 Missing path Domenico Viggiani
  2008-03-11 14:10 ` Simone Gotti
@ 2008-03-11 14:15 ` Chandra Seetharaman
  1 sibling, 0 replies; 4+ messages in thread
From: Chandra Seetharaman @ 2008-03-11 14:15 UTC (permalink / raw)
  To: device-mapper development

On Tue, 2008-03-11 at 14:53 +0100, Domenico Viggiani wrote:

That is weird. Any other error messages in /var/log/messages ?

Anyways, you can try this

echo - - - > /sys/class/scsi_host/host0/scan

chandra
> After adding a LUN from a EMC Clariion CX700 to a system with already many
> of these, I noticed that multipath doesn't see a path:
> 
> 360060160eb241700284f88a159efdc11
> [size=450 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
> \_ round-robin 0 [prio=1][enabled]
>  \_ 1:0:0:70  sdbo 68:32  [active][ready]
> \_ round-robin 0 [enabled]
>  \_ 0:0:3:70  sdbn 68:16  [active][ready]
>  \_ 1:0:1:70  sdbp 68:48  [active][ready]
> 
> >From SCSI layer, it is OK:
> 
> Host: scsi0 Channel: 00 Id: 02 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi0 Channel: 00 Id: 03 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi1 Channel: 00 Id: 00 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> Host: scsi1 Channel: 00 Id: 01 Lun: 70
>   Vendor: DGC      Model: RAID 5           Rev: 0219
>   Type:   Direct-Access                    ANSI SCSI revision: 04
> 
> but one device is missing under /dev:
> 
> brw-rw----  1 root disk 68,  16 Mar 11 14:44 /dev/sdbn
> brw-rw----  1 root disk 68,  32 Mar 11 14:45 /dev/sdbo
> brw-rw----  1 root disk 68,  48 Mar 11 14:45 /dev/sdbp
> 
> How can I fix this?
> 
> Thanks in advance
-- 

----------------------------------------------------------------------
    Chandra Seetharaman               | Be careful what you choose....
              - sekharan@us.ibm.com   |      .......you may get it.
----------------------------------------------------------------------

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2008-03-11 14:24 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-03-11 13:53 Missing path Domenico Viggiani
2008-03-11 14:10 ` Simone Gotti
2008-03-11 14:24   ` Domenico Viggiani
2008-03-11 14:15 ` Chandra Seetharaman

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