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ecrattlesnake
n00b
Joined: 01 May 2004
Posts: 12
Location: College Park, MD
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 Posted: Wed Mar 09, 2005 6:58 pm Post subject: cdrw woes |
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apparently my brother had been using a cdrw to store a bunch of data he needs for work, but after trying to use it on a different windows computer something got messed up and now only a small portion of the original data is visible -- and this was data that a special machine which uses cdrws as the default media to write output. other stuff he had put on the cd before/after/during using the other machine to write data is now lost somehow -- the size of the usable portion was reduced from 700MB to 604MB (i don't remember if cdrws now actually go up to using 700MB or not...).
my guess is that somehow different sessions were closed while others remained open... on my gentoo machine i can see some of the stuff by mounting using -t udf but still not that data that is needed.... does anyone have any ideas about how to recover the lost data?
thanks |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54793
Location: 56N 3W
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| Posted: Wed Mar 09, 2005 8:03 pm Post subject: |
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ecrattlesnake,
No all drives can see all sessions properly. CDs noften have several different filesystems on. You may get at the data (its the same data) with one and not others.
You need to mount the CD manually and play with the following mount options
| Code: | norock
nojoliet
session= |
Where session counts from 0
e.g. | Code: | | mount /dev/cdrom /mnt/cdrom -t iso9660 -o norock,session=3 |
This would mount the 4th session on a muti session CD and turn off Rockridge extensions, to give you bare 8.3 DOS file names.
There are other things you can try too, read
Another thing is to try isobuster (a free Windows program). I have heard it works unde WINE but I've not had any luck.
It does read individual CD blocks, even when the directory information has been lost.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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