[dm-devel] Losing paths

Wed Jul 23 17:00:45 UTC 2008

Could you please share the result of "multipath -v4".

Regards,
Pradipmaya.

On Wed, Jul 23, 2008 at 6:22 AM, Koehler, M - SPLXM
<Menno.Koehler at klm.com> wrote:
> Hello,
>
> Thanks for your respond, first I tried the multipathd -k reconfigure
> (and get a ok returned) and later when seen that it still was using tur
> we tried a reboot but with the same result.
>
> Kind regards,
>
> Menno
>
>
> -----Original Message-----
> From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com]
> On Behalf Of Romanowski, John (OFT)
> Sent: Wednesday, July 23, 2008 3:13 PM
> To: device-mapper development
> Subject: RE: [dm-devel] Losing paths
>
> Did you change multipath.conf and reboot the machine?
>  if not reboot, what steps put the changed multipath.conf into effect
> for the 2145's (SVC) LUNs?
>
>
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> -----Original Message-----
>
> From: dm-devel-bounces at redhat.com [mailto:dm-devel-bounces at redhat.com]
> On Behalf Of Koehler, M - SPLXM
> Sent: Wednesday, July 23, 2008 8:34 AM
> To: device-mapper development
> Subject: RE: [dm-devel] Losing paths
>
> Greetings,
>
> We tried testing with path_checker readsector0 end directio but we get
> some strange behavior eg the checker used is always tur!!
> So if we create a device entry special for IBM 2145 and define as
> path_checker directio or readsector0 we still see in the message file
> tur messages:
>
> Jul 23 08:09:00 kl11071i multipathd: 65:0: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:16: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:32: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:48: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:80: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:96: tur checker reports path is
> down
> Jul 23 08:09:00 kl11071i multipathd: 65:112: tur checker reports path is
> down
>
>
> Oure multipath.conf file is:
>
> defaults {
>        user_friendly_names yes
> }
>
> devices{
>      device {
>               vendor                  "IBM"
>               product                 "2145"
>               path_grouping_policy    group_by_prio
>               getuid_callout          "/sbin/scsi_id -g -u -s"
>               prio_callout            "/sbin/mpath_prio_alua %d"
>               path_checker            readsector0
>               failback                immediate
>       }
> }
>
> Did someone see this behavior before? Or are we doing something wrong?
> We are using device-mapper-multipath-0.4.5-27.el4_6.3 on a rhel4.6
> system.
>
> Kind regards,
> Menno
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