Full blank stop for HD DVD-RW

Shunsuke Kimura shunsuke.kimura at toshiba.co.jp
Fri Aug 3 06:33:41 PDT 2007


* From the T10 Reflector (t10 at t10.org), posted by:
* Shunsuke Kimura <shunsuke.kimura at toshiba.co.jp>
*
Dear Mr.Van Hove and Mr.Jacobson,
Thank you for your commants.
If there is no problem, we don't need to revise 
the current spec.
Drive can't distinguish the discs made by cancellation
of Full blank from the other discs. 
So drive reports the wrong disc as normal disc.
Best regards,
Shunsuke Kimura, Toshiba
Garrett Jacobson さんは書きました:
>* From the T10 Reflector (t10 at t10.org), posted by:
>* Garrett Jacobson <Garrett.Jacobson at microsoft.com>
>*
>Hello Kimura-san and Mr. Van Hove,
>
>Microsoft is not concerned about a disc that has a partial file system
>after a cancelled full blank command.	
>
>In fact, we much prefer this to the alternate scenario where a disc that
>was being fully blanked was cancelled and the disc state is blank but
>the data was not actually erased.  This creates a more confusing
>experience for the user and is difficult for the host to deal with.  The
>most important thing from our point of view is that the state of the
>disc as reported by the drive is consistent with the physical state of
>the disc...and in a cancellation case, it has not been blanked yet.
>
>Best Regards,
>
>Garrett Jacobson
>Microsoft, Corp.
>
>
>-----Original Message-----
>From: owner-mtfuji5 at avc-pioneer.com
>[mailto:owner-mtfuji5 at avc-pioneer.com] On Behalf Of Peter Van Hove
>Sent: Friday, July 27, 2007 7:22 AM
>To: t10 at t10.org; mtfuji5 at avc-pioneer.com
>Subject: Re: Full blank stop for HD DVD-RW
>
>Dear,
>
>My input if I may.
>
>From a data recovery standpoint this is not a bad thing.
>A user may hit the blank button and then come to the conclusion that
>it's 
>the wrong disc.  Being able to interrupt blanking and then having a disc
>in 
>a state where recovery is still possible is actually a blessing.
>Is an impartial file-system such a problem for a host ?
>
>Best Regards,
>Peter
>------------------------------------------------------------------
>Peter Van Hove, CEO Smart Projects
>CD, DVD, BD and HD DVD Data recovery
>Peter at Smart-Projects.net
>
>www.Smart-Projects.net
>www.IsoBuster.com
>------------------------------------------------------------------
>----- Original Message ----- 
>From: "Shunsuke Kimura" <shunsuke.kimura at toshiba.co.jp>
>To: <mtfuji5 at avc-pioneer.com>
>Cc: <t10 at t10.org>
>Sent: Friday, July 27, 2007 4:02 PM
>Subject: Full blank stop for HD DVD-RW
>
>
>> Dear Members,
>>
>> We would like to hear your opinion about HD DVD-RW command set. We
>worry 
>> about
>> the stop operation of "Full blank".
>>
>> "Full blank" operation is described in Mt.Fuji Rev 0.9 "5.15.7
>Blanking".
>>
>> "Full blank" operation is executed by BLANK command with Blanking Type
>= 
>> 000b.
>> The logical unit executes "Full blank" according to the following 
>> procedure.
>> 1. (Over)Write physically recorded portions or all sectors with 00h
>data.
>> 2. Write RMD as Empty state.
>>
>> During "1" process, the host can stop "Full blank" by CLOSE
>TRACK/SESSION 
>> command.
>> When the host stops "Full blank" operation by the command, the disc
>state 
>> and the
>> addressable area are same as just before "Full blank" command is
>issued.
>> At this time some parts of the addressable area are overwritten with
>00h 
>> data.
>>
>> We worry about the disc may cause some problems. For example, if file 
>> system data
>> remains and some user data are overwritten with 00h data, a host may
>not 
>> be
>> aware of the 00h data.
>>
>>
>> This matter was confirmed in the previous meeting, but please
>reconfirm.
>>
>>
>> Best Regards,
>> Shunsuke Kimura,
>> Toshiba
>>
>>
>>
>>
>> 
>
>
>*
>* For T10 Reflector information, send a message with
>* 'info t10' (no quotes) in the message body to majordomo at t10.org
*
* For T10 Reflector information, send a message with
* 'info t10' (no quotes) in the message body to majordomo at t10.org



More information about the T10 mailing list