Hi Folk, first post so bear with me if I'm in the wrong forum etc but I need some advice! Also I am not familiar with the mechanisms of DVD writing so forgive me for that too.
I've got a corrupted 4.7GB DVD-RAM that is formatted as a FAT32 volume. It is used to store large files from scientific studies that are subsequently read by an application. A few weeks ago we had a series of high voltage faults on our incoming mains supply resulting in the XP workstation that writes the disk falling over during the write phase. Of course the user didn't report this to use just carried on and successfully wrote other files.
Now we have a RAM disk with at least a corrupted file allocation table and probably chains of clusters overwritten by subsequent files. This is substantiated by it being possible to read all the files created since the date of the HV fault but only a subset of those before.
My understanding is that a FAT32 DVD-RAM is just a BIG floppy disk with a boot sector, FAT and lots and lots of sectors to use. Indeed CHKDSK when run without the /F (Fix) switch treats it as such and suggests that a fix is plausible. This in turn implies that a more sophisticated disk recovery package might so the job.
The problem is of course I'm loath to run such a process on the original disk. Years ago when we mended corrupted floppies we would secure and quarantine the damaged media and use DiskCopy to create a new sector by sector image, faults and all. This is what I need to do with my DVD-RAM. Diskcopy reckons that the drive is irremovable and so won't run; of course it was never designed to work with such huge media.
Can anyone suggest an equivalent to DiskCopy in order to recreate a forensic grade copy of this DVD-RAM in its entirety? Sorry about the length of the post but I thought it useful that you folks knew why I need all of the sectors not just those referenced by the existing FAT.
I live in hope...