Re: How can I acces unformatted cd/dvd with data on

[Mike McCarty <Mike.McCarty@sbcglobal.net>]

Michael Schwinck wrote:
> I am running etch (last updated in April 2007) and trying to read a dvd
> which contains one big file (no file system). - It has been written by a
> dvd-recorder (connected to a tv set). But also writing e.g. a tar
> archive to a cd leads to the same issue:
> /var/log/messages extract 
> .. 15:09:18 localhost kernel: hda: media error (blank): status=0x51
>     { DriveReady SeekComplete Error }
> .. 15:09:18 localhost kernel: hda: media error (blank): error=0x84
>    { AbortedCommand LastFailedSense=0x08 }Sep 20 15:09:18 localhost
>    kernel: ide: failed opcode was: unknown
> .. 15:09:18 localhost kernel: ATAPI device hda:
> .. 15:09:18 localhost kernel:   Error: Blank check -- (Sense key=0x08)
> .. 15:09:18 localhost kernel:   "28 00 00 00 00 00 00 00 01 00 00 00 00
>    00 00 00 "
> .. 15:09:18 localhost kernel: end_request: I/O error, dev hda, sector 0
>
> What I tried is to read some bytes of the dvd/cd issuing 
> "dd if=/dev/cdrom of=./tf bs=512 count=1" (you can vary "bs" that does
> not change anything).
>
> I assume /dev/cdrom corresponds with a block device, however the dvd/cd
> is unformatted, so data can not be accessed this way.
>
> Any ideas how to read the data?

The messages you have above do not indicate that you have
any data. There is a difference between a BLANK CDROM and
a CDROM which has no file system on it, but does have
a file.

Mike
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