Re: Proposed enhancements to MD

Lars Marowsky-Bree
2004-01-16T13:55:42Z

On 2004-01-16T07:43:36,
Matt Domsch <Matt_Domsch@dell.com> said:

> > Do you know whether DDF can also support simple multipathing?
> Yes, the structure info for each physical disk allows for two (and
> only 2) paths to be represented. But it's pretty limited, describing
> only SCSI-like paths with bus/id/lun only described in the current
> draft. At the same time, there's a per-physical-disk GUID, such
> that if you find the same disk by multiple paths you can tell.
> There's room for enhancment/feedback in this space for certain.

One would guess that for m-p, a mere media UUID would be completely
enough; one can simply scan where those are found.

If it encodes the bus/id/lun, I can forsee bad effects if the device
enumeration changes because the HBAs get swapped in their slots ;-)

Sincerely,
Lars Marowsky-Brée <lmb@suse.de>

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