RE: iSCSI: Creation of new LUNs

[julian_satran@il.ibm.com]

OK- we could make AE  mandatory. I thought that every transport supports it
as
it is arround for more than 30 years (predates SCSI). I am however not sure
that
this is the only way (or the best way) to announce a new LU, nor that it
will play nicely with discovery.


Julo

Black_David@emc.com on 15/09/2000 05:04:46

Please respond to Black_David@emc.com

To:   Julian Satran/Haifa/IBM@IBMIL, ips@ece.cmu.edu
cc:
Subject:  RE: iSCSI: Creation of new LUNs




This sort of proposal should go to T10.  A potential
issue is that not all SCSI transports support
Asynchronous Event Notification (AEN).  iSCSI could
make AEN mandatory to implement as part of addressing
this situation, but standardizing the use of AEN to
report LUN addition needs to be addressed in T10.
An I-D summarizing the problem and proposed solution
without reference to iSCSI or any other transport
might be a good start on this.

--David

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> -----Original Message-----
> From:   julian_satran@il.ibm.com [SMTP:julian_satran@il.ibm.com]
> Sent:   Thursday, September 14, 2000 10:13 AM
> To:     ips@ece.cmu.edu
> Subject:     Re: iSCSI: Creation of new LUNs
>
>
>
> Is somebody else doing it differently?
>
> Julo
>
> Raghavendra Rao <Jp.Raghavendra@EBay.Sun.COM> on 14/09/2000 21:19:58
>
> Please respond to Raghavendra Rao <Jp.Raghavendra@EBay.Sun.COM>
>
> To:   Julian Satran/Haifa/IBM@IBMIL
> cc:
> Subject:  iSCSI: Creation of new LUNs
>
>
>
>
>
> What is the recommended/approved way of announcing the availability
> of new LUNs in the target ? Currently I can do the following, but if
> it isn't explicitly documented, implementors tend to do their own
> things (causing interoperability problems)
>
> Upon creation/deletion of a LUN in the target, a target shall generate
> an asynchronous notification with  the SCSI event indicator set to
> either 2 or 4, followed by sense data with appropriate ASC and ASCQ
> indicating that LUNs have changed. The initiator, on receipt of this
> notification will issue a REPORT_LUN command to get a list of LUNs.
>
> -JP
>