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