SSC-3: Filemarks/Setmarks and Encryption

Raymond Gilson raymond_gilson at
Tue Nov 14 09:11:41 PST 2006

* From the T10 Reflector (t10 at, posted by:
* "Raymond Gilson" <raymond_gilson at>
I agree, Filemarks must not interact with encryption.
I would also suggest that we be very clear that position operations
(Locate/Space/Rewind) shall work without regard to the encryption state
of the data being positioned over.  We need to move around the media
without being required to provide keys for the data we are passing over.
Thank You,
Raymond Gilson
Symantec Corporation - Mail Stop ROS2-3
2815 Cleveland Avenue, Roseville, MN 55113
Phone: 651.746.7281	Fax: 651.746.6713
E-mail: raymond_gilson at
	From: owner-t10 at [mailto:owner-t10 at] On Behalf Of
Kevin D Butt
	Sent: Monday, November 13, 2006 5:27 PM
	To: t10 at
	Subject: SSC-3: Filemarks/Setmarks and Encryption
	I believe that we need to better clarify that Filemarks are
"encryption neutral".  SSC-3r3b does state in 4.20.2 "Filemarks shall
not be encrypted" but that is the only statement about filemarks and
encryption.  Additionally there is no statement about setmarks and
	I think we should add the following:
	1) In 4.20.2 where it says "Filemarks shall not be encrypted"
should be changed to "Filemarks and Setmarks shall not be encrypted and
are considered encryption neutral".
	2) In section Reading encrypted data on the medium, the
following paragraph:
	Filemarks and Setmarks are considered encryption neutral.
Reading into a Filemark or setmark shall not cause a change of
encryption state and shall not cause an encryption additional sense code
to be returned.
	Kevin D. Butt
	SCSI & Fibre Channel Architect, Tape Firmware
	MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
	Tel: 520-799-2869 / 520-799-5280
	Fax: 520-799-2723 (T/L:321)
	Email address: kdbutt at
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