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RE: iSCSI question
Julian,
Thanks. I have read that section but it is not very
clear.
I also
agree that Connection recovery requires everything in command
recovery.
But
what about session recovery? isn't it a superset of both connection and command
recovery?
Yours,
-Shahram
Sharam,
You may want to go over the recovery
chapter. It has detailed answers to
all your questions. The
superset/subset is based on functions you need for the next level.
Session recovery drops real recovery to
SCSI. Command recovery recovers from
individual command errors without changing connection and the highest enable you to switch to a new
connection and continue commands
there.
2 requires everything in
1.
Julo
| Shahram Davari
<Shahram_Davari@pmc-sierra.com> Sent by: owner-ips@ece.cmu.edu
08/07/2002 05:17 PM
| To:
ips@ece.cmu.edu cc:
Subject: iSCSI question
|
Hi,
I have a question regarding the hierarchy of error
recovery. Section 6.13 mentions the hierarchy as:
2: Connection
recovery 1: Digest failure recovery 0: Session recovery
And it
states that the higher levels are a superset of the lower levels and that
the level of complexity increases from 0->1->2.
Couple of
questions:
1) How is digest failure recovery done? by retransmission of
PDUs? 2) Why is the connection recovery a superset of session
recovery and more complex? 3) It seems to me the order should
be:
2: Session recovery 1: Connection recovery 0: Digest failure
recovery
I appreciate any
insight.
Thanks, -Shahram
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