RE: iSCSI: DLB [T.31]

["Julian Satran" <Julian_Satran@il.ibm.com>]

The wording was changed to reflect operationallevel (not implemented level) 3 days ago!

Julo

Black_David@emc.com Sent by: owner-ips@ece.cmu.edu 07/10/2002 10:56 AM Please respond to Black_David

To:        reames@diskdrive.com, ips@ece.cmu.edu         cc:                 Subject:        RE: iSCSI: DLB [T.31]

Steve,

>  From DLB's comments:
> 
>  >[T.31] 9.16.1  Type
>  >
>  >   An iSCSI target that does not support recovery within connection MAY
>  >   reject the status SNACK with a Reject PDU. If the target supports
>  >   recovery within connection, it MAY reject the SNACK after which it
>  >   MUST issue an Asynchronous Message PDU with an iSCSI event that indi-
>  >   cates "Request Logout".
>  >
>  > This should be conditioned on the operational ErrorRecoveryLevel of the
>  > session, not whether the target supports recovery within connection.
> 
> I would prefer that this not be conditioned on the ErrorRecoveryLevel. If
I 
> am writing code, I may choose to support recovery-within-connection, but 
> not all the features that would be required to move me up to 
> ErrorRecoveryLevel 1. I would like SNACK and Reject PDUs to work properly 
> for my code, even though it is technically only "ErrorRecoveryLevel 0.5".
>                  As I read it, changing the wording would allow the target to ignore
my 
> improved error recovery efforts unless I have a full ErrorRecoveryLevel 1 
> implementation. David, I doubt that is what you intended, so maybe you
want 
> to word it a little differently.

Actually, it was what I intended when I made that comment, BUT, I had not
considered the scenario you describe above ... and so, I now agree with
you.  Therefore I'll withdraw my [T.31] comment provided that the
possibility of multiple "ErrorRecoveryLevel 0.5" levels of support is
described in the overview section to be added on error recovery.

Thanks,
--David
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