lack of a requirement
keiji_katata at post.pioneer.co.jp
keiji_katata at post.pioneer.co.jp
Wed Aug 2 23:34:11 PDT 2006
* From the T10 Reflector (t10 at t10.org), posted by:
* keiji_katata at post.pioneer.co.jp
Ai san, this is an important point.
The requirement is that drive shall not overwrite the recorded user data area
that are included in the specified capacity (number of blocks field in
descriptor) of the Format Unit command.
It is because that drive shall perform the method of the shortest formatting
time. Host wants to expand the capacity to append new data to the recorded
with the recorded data.
Takaharu Ai <ai.takaharu at jp.panasonic.com>@avc-pioneer.com on 2006/08/03
mtfuji5 at avc-pioneer.com$B$KJV?.$7$F$/$@$5$$(B
$BAw?.<T(B: owner-mtfuji5 at avc-pioneer.com
$B08 at h(B: mtfuji5 at avc-pioneer.com
cc: t10 at t10.org
$B7oL>(B: Re: lack of a requirement
Let me confirm again.
Is the preservation of the recorded user data the requirement for Fast
Re-formatting or not?
If you think it is the requirement, please let all Mt.Fuji members know
the technical reason why it is mandatory.
Panasonic AVC Networks Company
---------------- Start of the original message ----------------
>From: keiji_katata at post.pioneer.co.jp
>To: mtfuji5 at avc-pioneer.com
>Cc: t10 at t10.org
>Date: Thu, 03 Aug 2006 13:54:51 +0900
>Subject: Re: lack of a requirement
>Hi Ai san,
>I did not write the requirement. This requirement is not specific for the
>Re-format. As you pointed out, Close Session and Grow Border have the
>capability. There is only some differences between Fast Re-format and others
>The typical scenario of the Fast Re-format is as follows.
>User took a video of an event by Handy Cum Recorder that does not use DVD
>User connected the Handy Cum Recorder to CE DVD recorder.
>User recorded the video on to a DVD-RW DL disc.
>Notes: CE DVD Recorder is one of the good equipment to make a MPEG file.
>User added Pictures of the event taken by Digital Camera on to the RW-DL
>Here, there are two ways.
>Case 1. User used a PC system that accepts Fully formatted UDF 2.00 RW-DL
>to write the Picture files. In this case, user must use DVD VR format to
>the video data.
>Case 2. User used the same CE Recorder to add the Picture files on to the
>disc. In this case, user may use ISO/UDF bridge and DVD Video format to
>the video data. Some PC software also may support the data appending on to
>Layer Jump Recorded RW-DL disc too.
>For the case 1, Grow Border format and Fast Re-format is usable. When OR0
>OR1 are located at outermost of the disc Fast Re-format guarantees the
>formatting time. Fast Re-format descriptors can tell the disc condition to
>via Read Format Capacity command.
>Please do not talk about file system and DVD data format that user must
>at the beginning. This is not item of MMC command set.
>Takaharu Ai <ai.takaharu at jp.panasonic.com>@avc-pioneer.com on 2006/08/01
>mtfuji5 at avc-pioneer.com$B$KJV?.$7$F$/$@$5$$(B
>$BAw?.<T(B: owner-mtfuji5 at avc-pioneer.com
>$B08 at h(B: mtfuji5 at avc-pioneer.com
>cc: t10 at t10.org
>$B7oL>(B: lack of a requirement
>I have one question.
>According to your explanation in June Mt.Fuji meeting, one more
>requirement existed which was requested by Host people. The requirement
>was that the recorded user data must be preserved through the fast
>re-formatting, because the data would be used after re-formatted.
>But in your new document, it is not listed in the requirements from the
>Host people. Is this requirement withdrawn by the Host people?
>If it is your mistake and the requirement is still alive, please revise
>your proposal document to add it and add the explanation how the Host
>uses the recorded user data after the re-formatting.
>It becomes very unclear for me how to achieve re-using the recorded data,
>because you explained that Read-only file system was applied to Layer
>Jump Recording, UDF2.01 was applied to fully formatted disc and UDF 2.00
>with DVD-VR format was applied to Quick formatted, i.e. Intermediate
>state, disc. It looks that this file system and disc format state
>combination requests the recording system to change the applied file
>system according to the new format state via the re-formatting process,
>if the disc state is changed by the fast re-formatting. How are the
>files in the old file system re-used in the new file system?
>Panasonic AVC Networks Company
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