2005-09-29 16:00:16

by Karel Kulhavy

Subject: Temporary workaround for stuck CD burner

I managed to turn off the DVD burner by suspending the laptop to disk
and reviving.

Now the command
cdrecord -tao dev=ATAPI:0,0,0 speed=8 /home/clock/cdrom.iso
is behaving like in those good olden days before Linux kernel seizure.

More information: dmesg reveals that during the seizure, no dmesg
messages were generated (no SCSI errors/timeouts etc.).

When mounting the first badly burned CD, SCSI errors were generated.
Last 3 of them:

hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
Error }
hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
ide: failed opcode was: unknown
end_request: I/O error, dev hdc, sector 8
printk: 2 messages suppressed.
Buffer I/O error on device hdc, logical block 1
hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
Error }
hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
ide: failed opcode was: unknown
end_request: I/O error, dev hdc, sector 16
hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
Error }
hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
ide: failed opcode was: unknown
end_request: I/O error, dev hdc, sector 0

CL<

2005-09-29 16:30:07

by Lennart Sorensen

Subject: Re: Temporary workaround for stuck CD burner

On Thu, Sep 29, 2005 at 06:00:07PM +0200, Karel Kulhavy wrote:
> I managed to turn off the DVD burner by suspending the laptop to disk
> and reviving.

Well that would turn off and on power and reset the drive just as a
reboot would have.

> Now the command
> cdrecord -tao dev=ATAPI:0,0,0 speed=8 /home/clock/cdrom.iso
> is behaving like in those good olden days before Linux kernel seizure.
>
> More information: dmesg reveals that during the seizure, no dmesg
> messages were generated (no SCSI errors/timeouts etc.).
>
> When mounting the first badly burned CD, SCSI errors were generated.
> Last 3 of them:
>
> hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
> Error }
> hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 8
> printk: 2 messages suppressed.
> Buffer I/O error on device hdc, logical block 1
> hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
> Error }
> hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 16
> hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete
> Error }
> hdc: media error (bad sector): error=0x30 { LastFailedSense=0x03 }
> ide: failed opcode was: unknown
> end_request: I/O error, dev hdc, sector 0

Those are normal messages meaning 'can not read this disc'. Usually
means incomplete or bad burn.

Len Sorensen