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Re: AW: AW: [dm-devel] multipathd failback



I also have no probelm with failover only with failback
but ill try upgrading to multipath-tools-0.4.5-0.20
thanks.
Herr, Manuel wrote:

I have no Problem with the failover also with SLES 9 2.6.5-7.244-smp.
But i'm not working with the isci initiator.

My Config:
defaults
{
        multipath_tool  "/sbin/multipath -v0"
        udev_dir        /dev
        polling_interval 5
        default_selector        "round-robin 0"
        default_getuid_callout  "/sbin/scsi_id -g -u -s /block/%n"
        default_prio_callout    "/bin/true"
        failback        immediate
}
There are newer Multipath tools available:
Im working with: multipath-tools-0.4.5-0.20
(Device Mapper is same)
I recommend to update them first. :)

This one is talking about the same Problem you have.
http://www.querzone.de/wiki/Wiki.jsp?page=EMCClariion
I don't know if this error is clariion specific.

Regards,
Manuel

> -----Urspr√ľngliche Nachricht-----
> Von: dm-devel-bounces redhat com
> [mailto:dm-devel-bounces redhat com] Im Auftrag von Yonathan Cohen
> Gesendet: Mittwoch, 25. Oktober 2006 09:22
> An: device-mapper development
> Betreff: Re: AW: [dm-devel] multipathd failback
>
> sorry but I am not sure what you mean.
> I am using an iscsi initiator (linux-iscsi rev 4.2) and this
> is what the multipathd daemon sees pepper:~ # multipath -l
> dm names   N
> dm table 3600c0ff00000000007c1d167985b4b06  N dm table
> 3600c0ff00000000007c1d167985b4b06  N dm status
> 3600c0ff00000000007c1d167985b4b06  N dm info
> 3600c0ff00000000007c1d167985b4b06  O
> 3600c0ff00000000007c1d167985b4b06
> [size=20 GB][features="0"][hwhandler="0"] \_ round-robin 0
> [enabled]  \_ 14:0:0:0 sda 8:0  [failed]  \_ round-robin 0 [active]
>   \_ 14:1:0:0 sdb 8:16 [active]
>
> sda and sdb are actually the same device discovered by iscsi
> via 2 different paths.
> when sda failed multipathd identified the problem and
> diverted traffic to sdb but after correcting the sda problem,
> multipathd did not become aware of this and of course when i
> failed sdb it did not failback to sda.
> i know that multipathd is suppose to poll for failed paths
> and reinstate them when they become valid.
> but for some reason it does not.
>
>
> Herr, Manuel wrote:
> >
> > On which Hardware? (HBAs, SAN)?
> >
> > > -----Urspr√ľngliche Nachricht-----
> > > Von: dm-devel-bounces redhat com
> > > [mailto:dm-devel-bounces redhat com] Im Auftrag von Yonathan Cohen
> > > Gesendet: Mittwoch, 25. Oktober 2006 08:50
> > > An: dm-devel redhat com
> > > Betreff: [dm-devel] multipathd failback
> > >
> > > Hello.
> > > My "multipathd" daemon does not FailBack It does not check the
> > > availability of a failed path and of course does not
> reinstate it My
> > > configuration is as follows:
> > > cat /etc/multipath.conf
> > >
> > > defaults {
> > >
> > >         failback        immediate
> > > }
> > > I am using the following packages:
> > > multipath-tools-0.4.5-0.11
> > > device-mapper-1.01.01-1.6
> > > I have them installed on a SUSE LINUX Enterprise Server 9
> > > (x86_64) sp-3 With kernel version: 2.6.5-7.244-smp Please help.
> > > Thanks.
> > >
> > > ____________________________________________________________
> > >
> > > Cohen Yonatan   |  +972-9-9718607 (o)
> > >
> > > Software. Eng,  Storage group
> > >
> > > Voltaire - _The Grid Backbone_
> > >
> > > --
> > > dm-devel mailing list
> > > dm-devel redhat com
> > > https://www.redhat.com/mailman/listinfo/dm-devel
> > >
> >
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> >
>
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