Re: [Dump-users] dump & cdrecord

[Helmut J. <jar...@ig...>]

On 20 Dec, Stelian Pop wrote:
> On Sun, Dec 19, 2004 at 06:39:46PM -0500, David Gesswein wrote:
> 
>> I have been trying to get multi cd dumps to work.  I am dumping with
>> /usr/sbin/dump -b64 -B665600 -F UserInfo -0 -L label -f /tmp/dump.fifo directory
>> cdrecord -v -eject -pad -data driveropts=burnfree /tmp/dump.fifo
>> 
>> I am restoring with restore -i -V -b64 -f /mnt/cdrom
>> and selecting all files dumped.  When I extract I get missing block at end of 
>> filename, assuming hole error when the next cd is started and that file 
>> is bad.  I also sometimes get resync restore, skipped # blocks
>> 
>> If I dd off the cd into a file specifying the exact size specified to dump  
>> I can use those files to restore without errors. If I dd the cd without 
>> specifying the length so the files are larger than dump dumped then it gives 
>> the same missing block errors.
>>    dd if=disk2 of=disk2a bs=1k count=665600
>> 
>> Any ideas on how to get this to work without dd?  
> 
> I rarely do multi-volume CD dumps but what you're using seems 
> correct (the command lines are identical to what is shipped in
> the dump archive examples/ directory).
> 
> Personnaly I don't directy use a fifo but dump into a temp
> file which I burn afterwards, and this always worked for me. I don't
> see how this could change something for you but still, you may want
> to try it.
> 
> Anther thing you could try is extracting with 'restore -rf' instead
> of the interactive mode. The code is a bit different, maybe there
> is something there.
> 
> Anyway, is someone on this list does have some reports on the multi-CD
> feature with recent versions of dump, please step forward. Otherwise,
> I'll have to do a test and burn some CD when I'll have a couple of
> minutes available.
> 
> Stelian.

The best thing is if dump/restore doesn't even notice there is a
multi-volume dataset.
See
http://www.serice.net/shunt

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany