[storm] iSCSI Level and Version

Mallikarjun Chadalapaka <cbm@chadalapaka.com> Wed, 17 August 2011 03:12 UTC

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From: Mallikarjun Chadalapaka <cbm@chadalapaka.com>
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Subject: [storm] iSCSI Level and Version
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In doing an internal review of the iSCSI Last Call drafts, someone asked me
this.  I want to run this response by the larger WG to see if we're all in
agreement.

Question: What is the difference between
Version-max/Version-min/Version-active values exchanged during the iSCSI
Login phase, and the negotiated value of iSCSIProtocolLevel key?

Answer: The V-* values agreed to during the Login process determine the
operating version of the iSCSI protocol, and announce if any other versions
can be supported by either side.  The operational iSCSIProtocolLevel key on
the other hand determines the specific protocol features that may be used on
an iSCSI session, within the "Version-active" versioned iSCSI protocol.

If this sounds reasonable, it is worth capturing this clarification in the
SAM-4 draft where this key is defined.

Thanks.

Mallikarjun