Greetings, and thanks again for your response,
I just found a small but importent mistake in the multipath.conf file.
There was no space between devices and the accolade so "devices{" it
must be "devices {" so I just changed that and checked as you already
suppost with multipath -ll -v5 and see now that the path_checker is
changed from tur to readsector0.
I will reproduce the tests tomorrow and will let you know or readsector0
will solve this issue.
Kind regards,
Menno Koehler
On Wed, 2008-07-23 at 13:02 -0400, Romanowski, John (OFT) wrote:
> this is a longshot, but try multipath -ll -v3 | more
> and see if the devices are really seen as IBM 2145? or something else?
>
> I have sles not RedHat, not sure of differences;
> Do you know if mkinitrd put an older copy of multipath.conf into initrd?
> try mkinitrd, zipl, reboot.
>
> -----Original Message-----
> From: dm-devel-bounces@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx]
> On Behalf Of Koehler, M - SPLXM
> Sent: Wednesday, July 23, 2008 9:23 AM
> To: device-mapper development
> Subject: RE: Losing paths
>
> 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@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx]
> On Behalf Of Romanowski, John (OFT)
> Sent: Wednesday, July 23, 2008 3:13 PM
> To: device-mapper development
> Subject: RE: 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@xxxxxxxxxx [mailto:dm-devel-bounces@xxxxxxxxxx]
> On Behalf Of Koehler, M - SPLXM
> Sent: Wednesday, July 23, 2008 8:34 AM
> To: device-mapper development
> Subject: RE: 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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