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

Alessandro Suardi
2008-06-18T12:15:51Z

On Wed, Jun 18, 2008 at 1:13 PM, Geert Uytterhoeven
<Geert.Uytterhoeven@sonycom.com> wrote:
> On Wed, 18 Jun 2008, Alessandro Suardi wrote:
>> On Fri, Jun 13, 2008 at 7:33 PM, Geert Uytterhoeven
>> <Geert.Uytterhoeven@sonycom.com> 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?

ATM I'm away from home (as usual), I'll post back when
I have the info you asked for and tried applying the
above patch. Thanks !

--alessandro

"Give me love / Or give me hate
Give me anything that's not just ok"

(Sophia, 'Weightless')