Re: Burning backup to dvd

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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


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