Re: SCSI URL scheme [WAS: Re: iSCSI: 2.2.6. Naming & mapping]

[Raghavendra Rao <jpr@divyaroot.India.Sun.COM>]

> out-of-band).  I don't see the point of the initiator sending its "view" to
> the target at any point.  If the initiator sends an incorrect view, you've
> just created an error scenario which needs additional definition.

Well, to extend what Julian said further, the initiator could ask the target
for a LUN value corresponding to a WWN as part of the authentication process,
instead of presenting its view - whether right or wrong. But something like
this needs to be done as there is no easier/faster way to translate a LU WWN
to a LUN value.

This may also help in building an authentication method for a LU access where
no such thing exists today ?


> case, the target will send its "view" for that initiator in REPORT LUNS
> SCSI command after login (which is actually the layer that cares about the
> LUN Map at all anyway).
> 

This will be a problem if the storage controller has a lot of LUNs. Since
REPORT LUNS only returns a list of LUNs, the initiator still has to send an
INQUIRY (page 83) request to each LU to to find a matching LU WWN (or until
a matching WWN is found).

-JP