MMC / Mt Fuji: Closing an empty invisible track on CD-RW
daviburg at windows.microsoft.com
Mon Jul 31 10:54:41 PDT 2006
* From the T10 Reflector (t10 at t10.org), posted by:
* "David Burg" <daviburg at windows.microsoft.com>
Yes, it is legacy. Yet if legacy is confusing and lead to multiple possible
implementations, we should still clarify what is the expected/needed
implementation. Unfortunate, but necessary.
It sounds that you say there is existing software expecting success doing
this on CD. Accordingly the command needs to be succeeded for CD and its
behavior needs to be clarified to be consistent across devices, right?
Your thinking about DVD-R/RW is sound.
From: owner-mtfuji5 at avc-pioneer.com [mailto:owner-mtfuji5 at avc-pioneer.com] On
Behalf Of keiji_katata at post.pioneer.co.jp
Sent: Tuesday, July 25, 2006 5:41 PM
To: mtfuji5 at avc-pioneer.com
Cc: t10 at t10.org
Subject: RE: MMC / Mt Fuji: Closing an empty invisible track on CD-RW
David, "Closing a CD Track" is very legacy item. So I did not propose any
in Fuji/MMC meeting. I think it is not the best idea to change it now.
huge number of system exist already. Huge number of new system are creating
In case of "Closing session/border on empty session", some CD writers create
empty (no user data) 4 sec track, then close the session. (This causes
unreadable multi-session CD-R. Because no VRS/AVDP recorded in the last
The other hands, DVD-R/RW has a reason to be described separately. DVD-R does
not have such minimum track size rule. So drive cannot make such empty track.
Therefore I proposed to prohibit this action of DVD-R in Fuji/MMC.
"David Burg" <daviburg at windows.microsoft.com>@avc-pioneer.com on 2006/07/26
mtfuji5 at avc-pioneer.com$B$KJV?.$7$F$/$@$5$$(J
$BAw?.<T(J: owner-mtfuji5 at avc-pioneer.com
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cc: <t10 at t10.org>
$B7oL>(J: RE: MMC / Mt Fuji: Closing an empty invisible track on CD-RW
Thank you for your answer.
I wish either error or no error but I wish a defined behavior on which we
software can rely on. If consistency with DVD is better, it is good for me to
always accept the command and do nothing. If more existing drives behave
differently and consistency with DVD is not reasonable, I'm ok with always
failing the command too. It can be a judgment call from the committee which
the two is preferred and should be explicitly specified in Mt Fuji & MMC.
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