Solved

Weird SCSI MultiSession Problem...

Posted on 1998-12-30
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Last Modified: 2010-04-27
Hi there,

I recently decided to add a batch of new files to a CD that i've been compiling.  The CD I decided to use already had about 7 directories on it, each of which was directly located off the root.  I was only adding files to one of these directories and found that once the CD had finished writing all the files that already existed in the directory to which I had added had disappeared.  The other directories were present so I know that the linking of the sessions had completed.

My question is this.  Is there any utility available, prefereably freeware/shareware, that I can use to access the data held within individual sessions on a multi-session CD?  I'd like to be able to go back to the original session and simply extract all of the files back onto my hard-disk - i'll then recreate the CD and write all of the files in one go.

Cheers

Pete
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Question by:peterwest
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Expert Comment

by:rbr
ID: 1014296
It depends on your OS and your CD-Rom drive. For the MAC use toast which is able to mount multiple sessions. Also WinOnCD is able to do this but not all CD-Rom drives can handle multiple sessions.
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Author Comment

by:peterwest
ID: 1014297
Hi,

I know that the hardware that i'm using is capable of reading individual sessions so that's not an issue.  I was hoping, however, to find a piece of shareware software to achieve my aim as forking out good money just for this one instance seems a bit excessive.

Pete

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by:rbr
ID: 1014298
For which OS?
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by:peterwest
ID: 1014299
Ok then, here's a few more details for you.

The machine is running both NT 4 and Windows 3.11 in a dual-boot config.  The cd-writer is a Plasmon CDR4240 - although I suspect that it's actually a badged Matsushita drive.

The current software I am using to write disks is EasyCD Pro by Adaptec - this is fine but unfortunately it won't let you extract the sessions as individual files but dumps it to hard-disk as an ISO data file.  It also has a habit of crashing when I attempt to do this anyway.

Pete


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Expert Comment

by:bpbult
ID: 1014300
Try using Easy CD cdreator adaptec (they're at version 3.5 or somthing), it has an tool called Session selector, with which you can select any session on the cd and it will display the files(system) for that session (and not from sessions added later)
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Author Comment

by:peterwest
ID: 1014301
Hi,

Again, using Easy CD Creator is not really an option as I don't want to have to pay out for a new package just to fix this one problem.  I have, however, made a little headway this morning.

I've installed Easy CD Pro under Windows 3.11 and have found that the reason I can't see the other files isn't because of a non-linked session but because of a bad volume descriptor in a previous session.  I tried creating an ISO9660 image file and then using a program called WinImage to extract the files from the image file but WinImage fails to recognise the file as an ISO image - probably because of the corrupt/damaged descriptor.

Is it possible to repair volume descriptors of an ISO file?  Is there a program that will attempt the repair automatically?

I understand these are different questions to the original one posted so i'll obviously increase the points for this question accordingly.

Thanks

Pete
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Expert Comment

by:bpbult
ID: 1014302
then maybe you could use cdr diagnostic at site http://www.enteract.com/~pcrowley/cdrdiagdesc.html 
it could help you a lot i think...
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Author Comment

by:peterwest
ID: 1014303
Thanks bpbult,

I downloaded CDR Diagnostic yesterday and tried it out at home last night - it managed to recover every single file that I thought i'd lost.  I was amazed as I had absolutely no luck using Easy CD Pro or Corel CD Creator.

Thanks

Pete

P.S. Please post an answer so I can award you the points.

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Accepted Solution

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bpbult earned 250 total points
ID: 1014304
Well, these will be my first points that I EARN. so here is the answer then.

PS my name is Sander
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Author Comment

by:peterwest
ID: 1014305
Thanks Sander :)
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