On 2004-10-27T11:51:42, Bryan Henderson <hbryan@xxxxxxxxxx> wrote:
> >In addition verifying the size and stuff it could also check that the
> >paths really (still) point to the same device (by storing the LUN WWN in
> >the hw_handler context, for example)
>
> Just to eliminate any ambiguity here, using terminology from the
> standards: A LUN is a logical unit number. A WWN is a fibre channel port
> or node name. There's no such thing as a LUN WWN. I presume you mean to
> check the logical unit device identifier, which is the world wide unique
> and persistent identifier of a logical unit. (That's what you get (among
> other things) from Page 0x83 of the SCSI VPD read from the LU).
Thanks for the clarification; EMC at least partially calls said
world-wide unique identifier the "LUN's WWN" though. And if we are
nitpicking, it's EVPD. ;-)
Sincerely,
Lars Marowsky-Brée <lmb@xxxxxxx>
--
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX AG - A Novell company
