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Old 06-26-2007, 11:30 AM   #1
rylan76
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Older GA8IRM based system corrupt CDROM reads in Linux only?


Hi

I've got a system based on the above motherboard. Under XP, it reads CDs fine from a normal EIDE CDROM drive - but under FC6 with the stock kernel, reads off CDRWs using the same drive are -always- corrupt. I've already tried using another CDROM drive, but the reads are still corrupt... ONLY under linux.

Any ideas what is going on, or why the machine reads CDRWs fine in XP, but always reads corrupt data off CDRWs under Linux only??

Seems very strange - I thought it was the motherboard (it IS an older mobo) but under XP it reads CDRWs just fine...

ANY ideas or help appreciated!

Thanks,
 
Old 06-26-2007, 12:41 PM   #2
michaelk
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How are you writing data to the CDRWs?
If you are using packet writing to burn the CDRWs then the filesystem is udf not iso9660.
 
Old 06-26-2007, 05:22 PM   #3
rylan76
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Quote:
Originally Posted by michaelk
How are you writing data to the CDRWs?
If you are using packet writing to burn the CDRWs then the filesystem is udf not iso9660.
No, I am not writing packets (for UDF) - I'm creating a normal iso9660 CDRW which always reads corrupt on the GA8IRM box... I can take the same disc, put it in my own FC6 system, and it works perfectly...

The strange thing is I get no error messages. The disc mounts correctly (as iso9660) and I can then read from it with no errors. However, what comes off it is always gibberish. I tested this by putting some .bz2 files on it, -tvv'ing them after copying always comes up with CRC errors.

But why only in linux? In XP, the drive works just fine, and reads CDRWs with no corruptions... damn strange, I'd say.
 
Old 06-28-2007, 03:01 AM   #4
Snowbat
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You could try turning DMA off for that drive and see if it makes any difference: hdparm -d0 /dev/hdX

Or alternate udma/PIO modes using hdparm -X (man hdparm for details).
 
Old 07-03-2007, 12:29 PM   #5
rylan76
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Thanks!

Tried that, didn't help... guess I must have some form of hardware problem. However, it does still work in Windows...
 
  


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