[linux-lvm] LVM in Dual Path SAN Environment

[Heinz J . Mauelshagen]

On Wed, Sep 11, 2002 at 11:39:32AM +0200, Andreas G. Schindler wrote:
> A Question to the LVM Guy(s):
> 
> We would like to use Linux LVM to overcome the fact, Linux doesn't 
> currently support Dual-Path access to SAN (Fibre-Channel) units.
> 
> Rumors are, LVM is able to detect multiple paths to a PV (in my case
> a SAN SCSI LUN) and will rearrange it to one single PV.

Correct.

> 
> As far as i see, this should solve the problem during regular operation
> (i.e. both paths to the SAN active). But what about the really interesting
> case of failure on one link? If this is the currently 'active' link (that
> one, still in t LVM's PV list), we need a failover and rearrangement
> of the PV list on the fly.
> 
> Does this work ??

Not so far. We want to have multipathing with failover support
in LVM2 this year.

> 
> Many thanks in advance
> 
> Regards, Andreas
> 
> -- 
> 
> Dr. Andreas G. Schindler        c/o Alpha Zero One Computersysteme GmbH
> schindler at az1.de                Frankfurter Str. 141, D-63303 Dreieich
> Tel +49 6103 57187 21           Germany
> 
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-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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