SAM definition of SCSI Device
bob.snively at ebay.sun.com
Wed May 26 07:57:26 PDT 1999
* From the T10 Reflector (t10 at symbios.com), posted by:
* Bob Snively <bob.snively at ebay.sun.com>
Selecting one portion of Ralph's discussion:
> My understanding is that the purpose behind this move to define an
> SCSI Device as having only one port relates to the issues you raise.
> The move intends to state clearly that the SCSI physical and transport
> layers do not provide any support whatsoever for multi-path implementa-
> tions. This certainly is true for the parallel SCSI bus. But, the
> technical editor for FCP-2 is adamant that it's an architectural
> 'feature'; I assume because he believes that it would be wrong to add
> multi-path address resolution features to FCP-2.
Actually, for those who are truly dedicated to "dynamic multi-pathing"
a la ESCON, Fibre Channel provides the feature through its hunt group
definitions with no change to SCSI or to FCP-2.
Hope that helps.
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