Re: Sun StorageTek 2530 and dm?

[Chandra Seetharaman <sekharan@us.ibm.com>]

I do not think adding that patch would not resolve the=problem you are
seeing.

On Mon, 2009-08-24 at 20:55 +0200, Jakov Sosic wrote:
> On Mon, 24 Aug 2009 11:38:18 -0700
> Chandra Seetharaman <sekharan@us.ibm.com> wrote:
> 
> > 
> > You need to have a stanza similar to following one for your device
> > in /etc/multipath.conf
> > --------------------
> > devices {
> >         device {
> >                 vendor                  "IBM"
> >                 product                 "1815"
> >                 path_grouping_policy    group_by_prio
> >                 hardware_handler        "1 rdac"
> >                 path_checker            rdac
> >                 failback                immediate
> >                 no_path_retry           queue
> >                 prio_callout            "/sbin/mpath_prio_tpc /dev/%n"
> >         }
> > }
> > ---------------------
> 
> Hi!
> 
> Yes, I've added that section, and still I get these:
> 
> Aug 24 20:47:38 node03 multipathd: 8:16: reinstated 
> Aug 24 20:47:38 node03 multipathd: 8:64: reinstated 
> Aug 24 20:47:38 node03 multipathd: qd: remaining active paths: 2 
> Aug 24 20:47:38 node03 multipathd: qd: switch to path group #2 
> Aug 24 20:47:38 node03 multipathd: qd: switch to path group #2 
> Aug 24 20:47:38 node03 multipathd: dm-0: add map (uevent) 
> Aug 24 20:47:38 node03 multipathd: dm-0: devmap already registered 
> Aug 24 20:47:47 node03 kernel: sd 1:0:1:0: queueing MODE_SELECT command.
> Aug 24 20:47:48 node03 openais[5236]: [CMAN ] lost contact with quorum
> device
> Aug 24 20:47:58 node03 multipathd: dm-0: add map (uevent) 
> Aug 24 20:47:58 node03 multipathd: dm-0: devmap already registered 
> Aug 24 20:47:58 node03 multipathd: 8:64: mark as failed 
> Aug 24 20:47:58 node03 kernel: end_request: I/O error, dev sde, sector 8
> Aug 24 20:47:58 node03 multipathd: qd: remaining active paths: 1 
> Aug 24 20:47:58 node03 kernel: device-mapper: multipath: Failing path
> 8:64.
> Aug 24 20:47:58 node03 kernel: sd 1:0:0:0: queueing MODE_SELECT
> command.
> Aug 24 20:48:07 node03 multipathd: 8:64: reinstated
> Aug 24 20:48:07 node03 multipathd: qd: remaining active paths: 2
> Aug 24 20:48:07 node03 multipathd: qd: switch to path group #2
> Aug 24 20:48:07 node03 multipathd: qd: switch to path group #2
> Aug 24 20:48:07 node03 multipathd: dm-0: add map (uevent)
> Aug 24 20:48:07 node03 multipathd: dm-0: devmap already registered
> Aug 24 20:48:07 node03 kernel: sd 1:0:1:0: queueing MODE_SELECT command.
> Aug 24 20:48:17 node03 multipathd: 8:64: reinstated 
> 
> 
> 
> 
> So it does not work ok :(
> 
> So far I've tried:
> 
> 1. defaults with initiators set to "Linux"
>    one path constantly failed
> 2. AVT with initiators set to "Solaris (with Veritas DMP or other)"
>    multipath flopping constantly - every 20 minutes there is enter in
>    main log about path failing
> 3. RDAC with initiators set to "Linux"
>    logs filled with messages like these show up in the message,
>    constantly flip/flopping
> 
> I haven't patch scsi_dh_rdac because I don't know how to add support
> for "SUN"/"LCSM100_S", and although I could figure it out, I'm not
> really a fan of compiling the kernel if it is not absolutely necessary.
> 
>