multipath with dual Compaq SA462 connected to MSA500

multipath with dual Compaq SA462 connected to MSA500

[Andreas Huck]

Hi,

I'd like to enable some sort of multipath to a RAID device which
is connected by two Smart Array 462 to a MSA500. The host is a DL380 G4.
In contrast to MSA1000 the MSA500 is just directly attached, no HBA
involved.
The RAID appears as /dev/cciss/c1d0 and /dev/cciss/c2d0 and currently
I am forced to disable one path by lvm filter.

Without the lvm filter I get:

Found duplicate PV iXZqRZZg8X6pNn4RBrxRbFiK8O6txY0b: using
/dev/cciss/c2d0p1 not /dev/cciss/c1d0p1

So, I'd like to use both controllers but setup multipath on them. Anyone
around who succeeded with such a setup? It should work since HP offers
some Win*** driver for it, but I need to enable it with SLES9-SP3++ ;-)

The drives do not register as scis defices and to not appear in
/proc/scsi/scsi. Therefore, /sbin/scsi_id -g -u -s /block/%n
does not work of course.

# multipath -v2 -d
dm names   N
dm table vgdata-netview  N
dm table vglocal-tivoli  N
dm table vgdata-oradata  N
dm table vglocal-tmp  N
dm table vglocal-optoracle  N
dm table vgdata-etc_tivoli  N
dm table vglocal-var  N

So just the LVM devices appear, vgdata is on the MSA500.

Any hints apprecciated!

Thanks and best regards,
Andreas Huck

Re: multipath with dual Compaq SA462 connected to MSA500

[Andreas Huck]

Hi,

On Tuesday, 10. October 2006 12:21, Andreas Huck wrote:
> 
> I'd like to enable some sort of multipath to a RAID device which
> is connected by two Smart Array 462 to a MSA500. The host is a DL380 G4.
> In contrast to MSA1000 the MSA500 is just directly attached, no HBA
> involved.
> The RAID appears as /dev/cciss/c1d0 and /dev/cciss/c2d0 and currently
> I am forced to disable one path by lvm filter.
> 
  
well, HP recommends the rather deprecated dm-multipath (on SLES9-SP3).
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00182786/c00182786.pdf
I recall the old raidtab configuration...

Regards,
Andreas

Re: multipath with dual Compaq SA462 connected to MSA500

[Bernd Zeimetz]

Hi,
>   
> well, HP recommends the rather deprecated dm-multipath (on SLES9-SP3).
>   

I think you mean md-multipath.

;)

Cheers,

Bernd

Re: multipath with dual Compaq SA462 connected to MSA500

[Andreas Huck]

Hi,

On Wednesday, 11. October 2006 00:23, Bernd Zeimetz wrote:
> Hi,
> >   
> > well, HP recommends the rather deprecated dm-multipath (on SLES9-SP3).
> >   
> 
> I think you mean md-multipath.

sure, thanks for comment!

Regards,
Andreas


> 
> ;)

Re: multipath with dual Compaq SA462 connected to MSA500

[Luca Berra]

On Tue, Oct 10, 2006 at 12:21:13PM +0200, Andreas Huck wrote:
>The drives do not register as scis defices and to not appear in
>/proc/scsi/scsi. Therefore, /sbin/scsi_id -g -u -s /block/%n
>does not work of course.

/sbin/scsi_id .... is only one of the possible getuid_callout
you can just change it to something else or even write your own

L.

-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
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