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Old 04-24-2006, 11:07 AM   #1
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format DVD for UDF works but DVD is bad

SuSE linux 2.4.20-4GB
udftools-1.0.0b2 (according to man mkudffs)

I use mkudffs --udfrev=0x0150 --vid="MYLABEL" --lvid="MYLABEL"

to format a DVD for UDF. The format works fine and if I mount/list the contents of the DVD it looks like a blank disc with my label, but if I try to write a file to the DVD it will fail with an input/output exception/error.

I do think the media itself is bad as I tried formatting it on other OSs and it also fails.

Is there any way with mkudffs or another UDF or linux command to check the DVD media to see if it is OK, instead of stumbling onto it later when a write fails ?
Old 04-25-2006, 07:00 AM   #2
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Is packet support enabled for the kernel? I think in order to write files to the disc just as you did to a hard drive, packet writing support have to be enabled by the kernel. Some distributions do not include this. Also the drive have to support packet writing.

I do not think there is any software for Linux to check the quality of the pits. Someone have to make a program to turn a CD or DVD drive into a spectograph to check the quality of the medium.
Old 04-25-2006, 11:18 AM   #3
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Other DVDs write fine, so I would guess that means the packet writing is enabled/supported, but not sure how exactly to verify that.

Also, does anyone know of the mkudffs completely blanks out the DVD to "erase" any previous data written to it, or does the mkudffs just basically change the "table of contents" so the directory structure only *thinks* the DVD is empty with just the lost+found folder ...?


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