Re: Problem mounting dvd if the drive spin down

[Andrew Morton]

Nate Grey <nate@xxxxxxxxxxxxx> wrote:
>
> Hello guys, this is my first post in this list, I'm not a subscriner so
> please CC me for reply and comments. Thank you.
> 
> 
> I've got an Acer Aspire 1601LC laptop and I get strange issue when
> mounting dvd (I cannot say the time 'cause firstly I thought to bad
> dvd).
> If I close the try and then mount the dvd everything is ok, but if the
> drive stops, for example if I insert the dvd and go on with reading my
> mail and try to access again the dvd this hangs up.

Did it work OK under any other kernel versions?  If so, which?

> The drive is a Matshita as dmesg say:
> 
> hdc: ATAPI 24X DVD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)
> 
> Example:
> I put the dvd into the drive, wait some time... the drive spin down
> $ mount /mnt/cdrom
> 
> I got this in /var/log/messages
> Apr  2 18:11:58 maggot kernel: hdc: DMA disabled
> 
> and dmesg:
> hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
> hdc: cdrom_decode_status: error=0x40 { LastFailedSense=0x04 }
> ide: failed opcode was: unknown
> 
> I'm using 2.6.11 kernel, but 2.6.10 wasn't better.
> I notice that if I run
> 
> $ hdparm -Y /dec/hdc
> 
> output:/dev/hdc:
>  issuing sleep command
>  HDIO_DRIVE_CMD(sleep) failed: Input/output error
> 
> the drive seems to wake up and I can run mount without problems.
> 
> This is the output from hdparm -i:/dev/hdc:
> 
>  Model=UJDA740 DVD/CDRW, FwRev=1.00, SerialNo=
>  Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
>  RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
>  BuffType=unknown, BuffSize=512kB, MaxMultSect=0
>  (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
>  IORDY=yes, tPIO={min:180,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4 
>  DMA modes:  sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 
>  UDMA modes: udma0 udma1 *udma2 
>  AdvancedPM=no
>  Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3: 
> 
>  * signifies the current active mode
> 
> 
> Is there any solution to this problem?
> 
> Thank in advance, and go on this way.
> 
> 
> 
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