/dev/sdaa /dev/sdab ... not recognized as valid paths?

/dev/sdaa /dev/sdab ... not recognized as valid paths?

[Sebastian Reitenbach]

Hi,

I do present 8 luns to the cluster. For each lun there are 4 ways through the  
SAN that can be used. Therefore I have devices like /dev/sdaa /dev/sdab and 
so on. The output of multipath -ll shows some disks with 4 paths, some with 
three, some only with two. In the output of multipath -ll only disks with 
three letters are shown e.g. /dev/sda. 
when I run e.g. /sbin/scsi_id -g -u -s /block/sdaa, then it outputs one of the 
configured ID's that I already have in /etc/multipath.conf.

How can I add these disks to the multipath failover?

I'm on SLES10 sp2.

regards
Sebastian

Re: /dev/sdaa /dev/sdab ... not recognized as valid paths?

[Hannes Reinecke]

Hi Sebastian,

Sebastian Reitenbach wrote:
> Hi,
> 
> I do present 8 luns to the cluster. For each lun there are 4 ways through the  
> SAN that can be used. Therefore I have devices like /dev/sdaa /dev/sdab and 
> so on. The output of multipath -ll shows some disks with 4 paths, some with 
> three, some only with two. In the output of multipath -ll only disks with 
> three letters are shown e.g. /dev/sda. 
> when I run e.g. /sbin/scsi_id -g -u -s /block/sdaa, then it outputs one of the 
> configured ID's that I already have in /etc/multipath.conf.
> 
> How can I add these disks to the multipath failover?
> 
> I'm on SLES10 sp2.
> 
Have you enabled udev?
No, it's not on by default. Don't ask.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)

Re: /dev/sdaa /dev/sdab ... not recognized as valid paths?

[Sebastian Reitenbach]

On Wednesday 14 January 2009 08:33:38 am Hannes Reinecke wrote:
> Hi Sebastian,
>
> Sebastian Reitenbach wrote:
> > Hi,
> >
> > I do present 8 luns to the cluster. For each lun there are 4 ways through
> > the SAN that can be used. Therefore I have devices like /dev/sdaa
> > /dev/sdab and so on. The output of multipath -ll shows some disks with 4
> > paths, some with three, some only with two. In the output of multipath
> > -ll only disks with three letters are shown e.g. /dev/sda.
> > when I run e.g. /sbin/scsi_id -g -u -s /block/sdaa, then it outputs one
> > of the configured ID's that I already have in /etc/multipath.conf.
> >
> > How can I add these disks to the multipath failover?
> >
> > I'm on SLES10 sp2.
>
> Have you enabled udev?
> No, it's not on by default. Don't ask.
yes, udevd runs:
service boot.udev status
Checking for udevd:                                                   running

Here the beginning of my /etc/multipath.conf file:
defaults {
        udev_dir        /dev
        path_grouping_policy    multibus
        getuid_callout  "/sbin/scsi_id -g -u -s /block/%n"
        prio    "alua"
        user_friendly_names yes

        default_features        "0"
}
blacklist {
        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*|sda"
}
multipaths {
        multipath {
...
        }
}

this version of the multipath tools is installed: multipath-tools-0.4.7-34.40

regards
Sebastian
>
> Cheers,
>
> Hannes