Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after mediachange and delay

[Geert Uytterhoeven]

On Wed, 18 Jun 2008, Alessandro Suardi wrote:
> On Fri, Jun 13, 2008 at 7:33 PM, Geert Uytterhoeven
> <Geert.Uytterhoeven@xxxxxxxxxxx> wrote:
> > On Fri, 6 Jun 2008, Geert Uytterhoeven wrote:
> >> When mounting a CD/DVD more than 30 seconds after inserting it, and reading
> >> from it, we get:
> >
> > Apparently the fix didn't make it to all the CCed lists...
> >
> > http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fjejb%2Fscsi-rc-fixes-2.6.git;a=commitdiff_plain;h=d1daeabf0da5bfa1943272ce508e2ba785730bf0
> 
> Oh, that's in mainline ? I still have the problem of having to

Not yet, it's in the scsi-rc-fixes-2.6 tree.

>  insert DVD / try accessing it and get errors / eject / re-insert
>  and then it magically works... the messages have changed
>  from what they were as reported here
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=10116
> 
>  (see comments #8 and #9) to these ones, in 2.6.26-rc6-git4:
> 
> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Result:
> hostbyte=0x00 driverbyte=0x08
> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Sense Key : 0x3 [current]
> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] ASC=0x11 ASCQ=0x0
> Jun 17 22:38:43 sandman kernel: end_request: I/O error, dev sr0, sector 232
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 29
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 30
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 31
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 32
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 33
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 34
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 35
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 36
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 37
> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 38
> 
> here I eject and reinsert the disc, and:
> 
> Jun 17 22:39:10 sandman kernel: UDF-fs: No VRS found
> 
>  lo and behold, no problem.
> 
> This does not, alas, happen every time. It might be at the first
>  DVD access after booting the laptop, but I haven't investigated
>  in this detail yet.

Does /sys/block/sr0/size reflect the correct size of the DVD?

Did you try applying the patch?

With kind regards,

Geert Uytterhoeven
Software Architect

Sony Techsoft Centre
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