simple DVD read error - ALL DVD

[Rick Stevens]

On 07/28/2014 11:52 AM, Balint Szigeti issued this missive:
> hello
>
> I have two DVDs which contains AVI files. I can't read it in my fedora
> box but it works in gentoo and windows.
>
> I used the DVD drive and the DVDs before so I don't think it is a HW
> problem.
>
> I got this in dmesg:
> [ 7892.555826] sr 1:0:0:0: [sr0] Unhandled sense code
> [ 7892.555834] sr 1:0:0:0: [sr0]
> [ 7892.555836] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
> [ 7892.555839] sr 1:0:0:0: [sr0]
> [ 7892.555842] Sense Key : Medium Error [current]
> [ 7892.555847] sr 1:0:0:0: [sr0]
> [ 7892.555851] ASC=0x10 <<vendor>> ASCQ=0x90
> [ 7892.555854] sr 1:0:0:0: [sr0] CDB:
> [ 7892.555856] Read(10): 28 00 00 00 00 00 00 00 02 00
> [ 7892.555866] end_request: I/O error, dev sr0, sector 0
> [ 7892.555872] Buffer I/O error on device sr0, logical block 0
>
> what shoud I do now?

Those errors generally indicate that the disc(s) are dirty, as it is
a "medium error" (meaning the DVD media, not the size between "small"
and "large").

Try cleaning the DVD. I use eyeglass cleaner solution and the cloth that
comes with it. Remember to wipe from the center of the disk to the edge
in a radial motion (straight line) and don't apply a lot of pressure.
Do NOT wipe in a circle around the disk...any scratches you get doing
that can confuse the tracking mechanism (CDs and DVDs are written as
a spiral track starting from the center of the disc outwards like an old
vinyl record in reverse).

A blast of air into the drive (be careful!) can be helpful as well.
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- Rick Stevens, Systems Engineer, AllDigital    ricks at alldigital.com -
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