Comment 663 for bug 88746

I can see a similar problem with a Samsung DVD writer. There are many resets and inexplicable I/O errors in the logs. Re-connecting the drive does not help. Tested with *two* Samsung SE-S224Q drives, so drive malfunction is unlikely, and with two computers, a server and a laptop. The frequency of errors was approximately the same in all cases.

Some more facts:

DVD+RW with UDF:
    * Usually mounts and unmounts cleanly with no error messages.
    * Device resets always appear in bursts of about ten.
    * Writing a large amount of data often leads to media damage.

DVD-RAM with Reiser4:
    * Numerous (> 30) resets occur when the FS is mounted.
    * Unmounts are usually quick and clean.
    * I/O errors are reported approximately once per 10 resets.
    * Unlike DVD+RW, files remain readable even after I/O error reports...

Kernels: 2.6.28.7 and 2.6.28.9