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RE: [dm-devel] dm-emc doesn't works with vanilla kernel



Nicola,

Detaching and re-attaching up to 3 out of 4 paths with in-flight
IO works just fine for me using 2 Emulex HBAs to a CLARiiON AX150,
a version 2.6.16-rc5 linux kernel, and a very recent
multipath-tools.0.4.7 package.

Is it possible for you to try with Emulex HBAs instead
of Qlogic ones?

Ed

> -----Original Message-----
> From: dm-devel-bounces redhat com 
> [mailto:dm-devel-bounces redhat com] On Behalf Of Nicola Murino
> Sent: Tuesday, July 11, 2006 8:26 AM
> To: device-mapper development
> Subject: RE: [dm-devel] dm-emc doesn't works with vanilla kernel
> 
> Thanks for your reply, 
> 
> I'm currently using multipath-tools 0.4.7, the problem happen when I
> manually detach a path with a kernel>2.6.13, 
> 
> 
> The system works fine with only an active path, here a re the logs:
> 
> Jul  7 12:29:00 nodob qla2300 0000:0a:03.0: LIP reset occured (f8ef).
> Jul  7 12:29:35 nodob rport-2:0-0: blocked FC remote port time out:
> removing target
> Jul  7 12:29:45 nodob scsi2 (0:1): rejecting I/O to dead device
> Jul  7 12:29:45 nodob device-mapper: dm-multipath: Failing path 8:112.
> Jul  7 12:29:45 nodob device-mapper: dm-emc: emc_pg_init: sending
> switch-over command
> 
> 
> but when I reattach the failed path the system is unable to react to
> this event, I have this in my logs (kernel-2.6.14 and 2.6.16):
> 
> Jul  7 12:30:05 nodob qla2300 0000:0a:03.0: LIP occured (f8ef).
> Jul  7 12:30:06 nodob Vendor: DGC       Model: RAID 5            Rev:
> 0207
> Jul  7 12:30:06 nodob Type:   Direct-Access                      ANSI
> SCSI revision: 04
> Jul  7 12:30:06 nodob SCSI device sdl: 629145600 512-byte hdwr sectors
> (322123 MB)
> Jul  7 12:30:06 nodob sdl: asking for cache data failed
> Jul  7 12:30:06 nodob sdl: assuming drive cache: write through
> Jul  7 12:30:06 nodob SCSI device sdl: 629145600 512-byte hdwr sectors
> (322123 MB)
> Jul  7 12:30:06 nodob sdl: asking for cache data failed
> Jul  7 12:30:06 nodob sdl: assuming drive cache: write through
> Jul  7 12:30:06 nodob sdl:<6>sd 2:0:0:0: Device not ready.
> Jul  7 12:30:06 nodob end_request: I/O error, dev sdl, sector 0
> Jul  7 12:30:06 nodob Buffer I/O error on device sdl, logical block 0
> Jul  7 12:30:06 nodob sd 2:0:0:0: Device not ready.
> Jul  7 12:30:06 nodob end_request: I/O error, dev sdl, sector 0
> Jul  7 12:30:06 nodob Buffer I/O error on device sdl, logical block 0
> Jul  7 12:30:06 nodob unable to read partition table
> Jul  7 12:30:06 nodob Attached scsi disk sdl at scsi2, 
> channel 0, id 0,
> lun 0
> Jul  7 12:30:06 nodob Attached scsi generic sg7 at scsi2, 
> channel 0, id
> 0, lun 0,  type 0
> Jul  7 12:30:06 nodob Vendor: DGC       Model: RAID 5            Rev:
> 0207
> Jul  7 12:30:06 nodob Type:   Direct-Access                      ANSI
> SCSI revision: 04
> Jul  7 12:30:06 nodob error 1
> Jul  7 12:30:06 nodob scsi: Unexpected response from host 2 
> channel 0 id
> 0 lun 0 while scanning, scan aborted
> 
> and I have to reboot the server to have a working system,
> 
> with kernel-2.6.13 on the same system with the same udev and
> multipath-tools all is fine,
> 
> thanks
> Nicola
> 
> 
> Il giorno lun, 10/07/2006 alle 11.07 -0400, egoggin emc com 
> ha scritto:
> > I suspect that the problem is with multipath-tools not the
> > dm-emc code.  You may need to upgrade your multipath-tools
> > package to a version 0.4.7 base.  Could you try this and
> > let me know the status?
> > 
> > I have no problem of this sort with my CX series CLARiiONs
> > with version 2.6.(13,14,15,16) linux kernels.
> > 
> > > -----Original Message-----
> > > From: dm-devel-bounces redhat com 
> > > [mailto:dm-devel-bounces redhat com] On Behalf Of Nicola Murino
> > > Sent: Saturday, July 08, 2006 5:09 AM
> > > To: dm-devel redhat com
> > > Subject: [dm-devel] dm-emc doesn't works with vanilla kernel
> > > 
> > > Hi all,
> > > 
> > > I'm successfully running multipath-tools on a gentoo server 
> > > since almost
> > > a year, only a problem:
> > > 
> > > if I use a kernel different from 2.6.13 after detaching a 
> fibre path
> > > dm-emc doesn't send trespass and the cx300 luns are not 
> accessible, I
> > > got this problem with kernel-2.6.14 and kernel-2.6.16.19, 
> > > kernel-2.6.13
> > > works ok. 
> > > 
> > > On another installation with centos, last kernel 
> > > (2.6.9-34.01EL) and the
> > > same storage all is fine.
> > > 
> > > Would be great if dm-emc works properly with the upstream kernels,
> > > 
> > > thanks
> > > Nicola
> > > 
> > > --
> > > dm-devel mailing list
> > > dm-devel redhat com
> > > https://www.redhat.com/mailman/listinfo/dm-devel
> > > 
> > 
> > --
> > dm-devel mailing list
> > dm-devel redhat com
> > https://www.redhat.com/mailman/listinfo/dm-devel
> 
> --
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> 


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