topic Qlogic Failover - forcing path switch in Operating System - Linux

Qlogic Failover - forcing path switch

Simon Hargrave — Fri, 05 Aug 2005 09:57:38 GMT

If using the qlogic driver in failover mode, I want to force the failover to the other path (this is using MSA1000 with active/passive 2/8 switches), is there a way to force this in software?

I don't want to use SANsurfer (and I don't believe I can as it appears not to see failover paths even though failover is working).

Basically I want the equivelant of "spmgr select XXX" but without Secure Manager.

I can already do it by removing fibre I just want a software way to do it.

I'm hoping there's something I can do like: -

echo "qla-somethingorother" > /proc/scsi/qla2300/0

c'est possible?

Re: Qlogic Failover - forcing path switch

Steven E. Protter — Sat, 06 Aug 2005 16:59:32 GMT

Based on how long this has not had an answer attempt, I make a suggestion.

Back up the file in question /proc/scsi/qla2300/0

Or copy its contents somewhere safe.

Try your echo command, which I can't help with at all.

Then try it.

Sometimes a test is better than waiting three days for an answer.

SEP

Re: Qlogic Failover - forcing path switch

steven Burgess_2 — Tue, 09 Aug 2005 07:32:22 GMT

Hi Simon

Via SANsurfer you should be able to see and set failover paths via

Configure --> Highlight the device you are configuring in the Node Name section --> right click --> Configure Luns

From here select the HBA port --> right click and set the LUN to the desired path (prefered/alternate). Once you have made the alteration, save the configuration and rebuild the Linux initrd image as prompted.

Essentialy, by setting an alternate to prefered you are forcing a failover ?

HTH

Steve