Burning backup to dvd

[Ed Kim]

Anne Wilson wrote:
> On Wednesday 26 July 2006 15:56, Ed Kim wrote:
>> try these commands
>>
>> mkisofs -o /Backup/mybackup.iso -R -J -l -v /path/to/data/directory/
>>
> That worked perfectly.
> 
>> cdrecord -v -sao dev=cdrom -data /Backup/mybackup.iso
>>
> This still chokes:
> 
> ......
> cdrecord: Found DVD media: using cdr_mdvd.
> Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
> Driver flags   : SWABAUDIO BURNFREE
> Supported modes: PACKET SAO
> Drive buf size : 1563904 = 1527 KB
> FIFO size      : 4194304 = 4096 KB
> Track 01: data  1714 MB
> Total size:     1968 MB (195:02.81) = 877711 sectors
> Lout start:     1969 MB (195:04/61) = 877711 sectors
> Current Secsize: 2048
>   ATIP start of lead in:  -150 (00:00/00)
> Disk type:    unknown dye (reserved id code)
> Manuf. index: -1
> Manufacturer: unknown (not in table)
> Blocks total: 15872 Blocks current: 15872 Blocks remaining: -861839
> cdrecord: WARNING: Data may not fit on current disk.
> cdrecord: Notice: Most recorders cannot write CD's >= 90 minutes.
> cdrecord: Notice: Use -ignsize option to allow >= 90 minutes.
> cdrecord: Notice: Use -overburn option to write more than the official disk 
> capacity.
> cdrecord: Notice: Most CD-writers do overburning only on SAO or RAW mode.
> ******
> 
> From the man page:
> 
>  -ignsize
>               Ignore  the known size of the medium. This option should be used
>               with extreme care, it exists only for debugging  purposes  don’t
>               use  it for other reasons.  It is not needed to write disks with
>               more than the nominal capacity.  This option implies  -overburn.
> 
> so it doesn't sound as though that would be the solution.
> 
> In order to rule out some of the possible causes I did try to write a 
> straightforward data dvd backup in k3b - something I do regularly on this 
> workstation.  Both boxes have the same version of cdrecord.  On the box that 
> I'm trying to backup I cannot get a dvd backup.  On this one there is no 
> problem.  On the problematic one I keep seeing references to pread642(2)
> 
> Anne
> 
Can you attempt to use a different DVD media?  in the past, when I have 
seen cdrecord spit,

Disk type:    unknown dye (reserved id code)

A change in media manufacturers or a double check on +R/-R capabilities 
and disc types does the trick.

-- 
Ed Kim, RHCE
http://www.rhatbox.com