Question for RW-DL fast re-format

[Takaharu Ai]

* From the T10 Reflector (t10 at t10.org), posted by:
* Takaharu Ai <ai.takaharu at jp.panasonic.com>
*
Hello Katata-san,
>May I confirm your opinion? You prefer Option 2?
Almost yes. Option 2 with my suggestion.
>[Comment as Pioneer]
>Pioneer proposal is not new idea. BD-RE drive does not write user data area
at
>the default format operation of RE disc. I think it is same reason that 1
hour
>operation time is not acceptable.
You are wrong. MMC does not prohibit to overwrite something on the user
data area on BD-RE for Format Type=00h, altough no vendor won't do that.
But Pioneer's proposal tries to prohibit from doing that.
Best Regards,
Harry Ai
VEBU
Panasonic AVC Networks Company
Matsushita/Panasonic
Osaka, Japan
---------------- 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, 22 Jun 2006 11:30:01 +0900
>Subject: Re: Question for RW-DL fast re-format
>
>
>Thank you Ai san,
>
>May I confirm your opinion? You prefer Option 2?
>
>[Comment as Pioneer]
>Pioneer proposal is not new idea. BD-RE drive does not write user data area
at
>the default format operation of RE disc. I think it is same reason that 1
hour
>operation time is not acceptable.
>
>Best regards,
>
>Keiji Katata
>PIONEER CORP.
>
>
>
>
>
>Takaharu Ai <ai.takaharu at jp.panasonic.com>@avc-pioneer.com on 2006/06/21
>10:03:43
>
>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, t10 at t10.org
>cc:
>bcc:
>$B7oL>(B:  Re: Question for RW-DL fast re-format
>
>
>Hello David,
>
>One of the most important issues Pioneer proposed and Chair wanted to
>gather the opinion of each company is that the Standard can prohibit the
>Logical Unit from doing something during a command although it has not
>been prohibited in the prior version of the standard.
>
>
>According to Pioneer's proposal, although it is not the documented
>proposal, it is prohibited from overwriting a part or whole of the user
>data area by FORMAT UNIT command with Format type=00h, i.e. Full format,
>for DVD-RW DL disc.
>The reason they explained was that some of the software vendors wanted
>to preserve the recorded user data through the format process. They said
>that a software which can write and append data to the incomplete DVD-RW
>disc. But another company requested that they need the method to convert
>the incomplete state to complete state without no recorded data
>modification.
>
>So, Pioneer proposed that the Full format *SHALL* not overwrite data to
>the recorded user data area.
>
>But the current Mt.Fuji and MMC does not prohibit from doing that. So,
>it is possible that the Logical Unit overwrite some of the user data
>area for the security reason or other purpose. This behavior does not
>impact to the execution time of the Full format process. We think
>Pioneer's proposal deny this freedom of the implementation.
>
>
>We understand Pioneer's concern for the execution time of the Full
>format for DVD-RW DL disc, because the DVD-RW DL have a new feature
>which makes the re-formatting function for the recorded disc very fast.
>
>We think that function is very important and we believe no drive vendor want
>to spoil this function. So no one implement the Full format very slow,
>even if Mt.Fuji/MMC does not prohibit.
>
>Our proposal is to add an recommendation that the drive should not
>overwrite all the user data area where is requested to be formatted by
>Full format of FORMAT UNIT command for DVD-RW DL disc during the
>formatting process.
>
>
>If a software vendor want make the incomplete state DVD-RW DL disc to
>complete sate without no modification of the recorded user data through
>the formatting process, we already have this function as Grow format.
>Grow format is not the mandatory function for DVD-RW SL, but we can make
>it a mandatory function for DVD-RW DL. This function can also be defined
>as a fast re-format operation.
>
>
>
>
>Best Regards,
>
>Harry Ai
>VEBU
>Panasonic AVC Networks Company
>Matsushita/Panasonic
>Osaka, Japan
>
>
----------------- End of the original message -----------------
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