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@xxxxxxxxxx> 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.
>
>
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