[Debburn-devel] Error message for command "readom -fulltoc dev=/dev/dvd"

[George Danchev]

On Saturday 14 July 2012 12:35:01 Thomas Schmitt wrote:
> Hi,
> 
> > CDB: 43 00 02 00 00 00 00 00 04 00
> > status: 0x2 (CHECK CONDITION)
> > Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 24 00 00 00
> > Sense Key: 0x5 Illegal Request, Segment 0
> > Sense Code: 0x24 Qual 0x00 (invalid field in cdb) Fru 0x0
> 
> The failed command is inappropriate for DVD.
> 42 00 02 is READ TOC/PMA/ATIP with requested format "Raw TOC".

I guess it is a typo and you meant:
43 00 02 as given in the log, or you really mean 42 00 02?
I have no specs at hand, though.

> The specification MMC-5 prescribes above reaction:
> "6.26.3.4.3 Non-CD Discs
>  [...]
>  If the Host requests a TOC/PMA/ATIP of this form when a non-CD disc
>  is present, the Drive shall terminate the command with
>  CHECK CONDITION status and set sense bytes SK/ASC/ASCQ to
>  ILLEGAL REQUEST/INVALID FIELD IN CDB."
> 
> 
> So probably option -fulltoc of readom is not suitable for DVD.

the readom source surely indicates that DVD is also meant to be read:

/*
 * If read DVD structure is supported and works, then
 * we must have a DVD media in the drive. Signal to
 * use the DVD driver.
 */

but it can be buggy as well?

> > [...] wodim -toc [...]
> > track:   1 lba:         0 (        0) 00:02:00 adr: 1 control: 4 mode: -1
> > track:lout lba:   1803456 (  7213824) -1:59:74 adr: 1 control: 7 mode: -1
> 
> Obviously retrieved by a differenct SCSI command, this states that the
> DVD is supposed to have 1803456 readable data blocks of 2048 bytes each.
> 
> 
> Have a nice day :)
> 
> Thomas
> 
> 
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