[t10] CDB "EF 00 00 00 00 00" - iSCSI???

Pat LaVarre LAVARRE at iomega.com
Fri Jun 27 10:08:23 PDT 2003


* From the T10 Reflector (t10 at t10.org), posted by:
* "Pat LaVarre" <LAVARRE at iomega.com>
*
Any news?
 
I remember Scsi 2 did not decide the length of ops x 60..7F, 80..9F, C0..DF, E0..FF ... much less give any of them any standard meaning.
 
Pat LaVarre

	-----Original Message----- 
	From: Mike Berhan [mailto:mikeb at bustrace.com] 
	Sent: Mon 6/23/2003 8:12 AM 
	To: t10 at t10.org 
	Cc: 
	Subject: CDB "EF 00 00 00 00 00" - iSCSI???
	
	

	* From the T10 Reflector (t10 at t10.org), posted by:
	* "Mike Berhan" <mikeb at bustrace.com>
	*
	Hello,
	
	I am seeing the CDB "EF 00 00 00 00 00" being sent to the hard drives on a
	Windows 2000 test system (I do not have the system; I have been given the
	software trace).  This CDB isn't defined in SPC or SBC as far as I can tell.
	
	For the ATA drive on the system, it fails.  However, for iSCSI devices, it
	is working.  The SCSI miniport driver is the "IBM iSCSI Client for Windows
	Device Driver" and the drives attached to it accept this CDB and return
	eight bytes of data.
	
	In talking to the actual iSCSI device vendor, they indicate that they do not
	accept this CDB.  If this is true, this "could" indicate that this is some
	means of private communication between utility software and the IBM iSCSI
	driver.
	
	My question is the following for those familiar with iSCSI.  Is this CDB
	something proprietary to say an IBM driver or something that all iSCSI
	driver developers are using?  Is it even related to iSCSI?  Has anyone ever
	seen this CDB before or know of a specification that describes it and the
	return data?  If it helps any, here is some sample return data:
	
	9C C8 11 AC 00 00 00 CC
	
	Thank you in advance.
	
	Mike Berhan
	mikeb at bustrace.com
	
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