Re: iSCSI-related conclusions from Orlando interim Meeting

[Santosh Rao <santoshr@cup.hp.com>]

All,

I have raised this question on the reflector earlier without getting any
response.

If the target's only means for a logout is to "request a logout" through an AEN
(now called Asynch Message) and host SCSI stacks disable AER by default (which
is the behaviour today), then, targets DO NOT have a reliable means of logging
initiators out, since they cannot send AE messages.

Targets MUST be allowed to send logouts or another reliable means be defined in
the spec that allow targets to logout initiators. This peer-to-peer model
[wherein a target can originate logout] is not a violation of SAM and allowing
targets to send logouts is the most expeditious form of error recovery at the
target end.

Such a peer-to-peer model will also rid the spec of its convoluted way of using
NOP-IN [which is a NOP response] as a NOP request when targets wish to check
the  connection.

Targets MUST be allowed to originate Logout and NOP-OUT.

Regards,
Santosh

Black_David@emc.com wrote:

> - "AER" is used only for SCSI

> - iSCSI communication of asynchronous events is through a
> mechanism that is now called "Asynchronous Messages" - iSCSI
> uses these to implement AER

>  - If a SCSI initiator has disabled AER, iSCSI does not send
> the corresponding Asynchronous Messages
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