Very much implementation specific. HBA's can do both or either for various valid reasons.

From: owner-t10@t10.org on behalf of Mignon Fernandez
Sent: Tue 4/11/2006 4:42 AM
To: t10@t10.org
Subject: Command Tag

Hello,

Is it correct to assume that it is not the Driver-level software which assigns the Command Tag, but the Transport-layer-level controller?

Thanks in advance,

Mignon Fernandez

This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.

------------------------------------------------------------
CONFIDENTIALITY NOTICE

This email and any attached documents may be confidential
and property of BiTMICRO Networks, Inc. If you are not the

intended recipient, you may not disclose, copy, distribute,
or act in reliance on the information in this email.

Also note, this email and attached documents are scanned for

the presence of virus.  Changes made to this email after it

has been sent is not the responsibility of BiTMICRO Networks, Inc.