Re: PROBLEM: Linux ATAPI CDROM ->FIX: SAMSUNG CD-ROM SC-140

[Grant Coady <grant_lkml@dodo.com.au>]

On Sat, 31 Dec 2005 12:06:28 +0000, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

>On Gwe, 2005-12-30 at 21:17 -0800, Steven J. Hathaway wrote:
>> The fix is to add the following record to the drive_blacklist[] table.
>> 
>>      { "SAMSUNG CD-ROM SC-140",  "ALL" },
>
>This is not a fix since you said before the drive worked back in 2.4.20.
>You need to find out what in 2.4.20-21 broke the support rather than
>just turning it off.
>
>You could equally just use hdparm -d0 until you fix it.

I have a similar issue with a 'SAMSUNG SC-140B' CDROM in 2.4.latest 
and also 2.6.latest.  

hdparm -d0 /dev/hdc + hdparm -X8 /dev/hdc fixes it :(  

I updated the CDROM firmware, no change.  With 2.4.33-pre1:
syslog:
Jan  2 09:02:33 niner kernel: hdc: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
Jan  2 09:02:33 niner kernel: hdc: drive_cmd: error=0x04Aborted Command
Jan  2 09:02:52 niner kernel: hdc: CHECK for good STATUS
Jan  2 09:03:26 niner kernel: hdc: media error (bad sector): status=0x51 { DriveReady SeekComplete Error }

CDROM is stuck at the moment:
root       279  0.0  0.3   1688   612 ttyp1    D+   09:03   0:00 mount /dev/hdc /mnt/cdrom/

Should I ignore this and replace the CDROM or blacklist the thing?

The box here is a s/h thing I've had for only a month, no history 
for you.  What other testing you suggest to narrow the thing down?

Hmm, while I wrote this, the driver recovered, syslog:
Jan  2 09:18:28 niner kernel: hdc: media error (bad sector): error=0x34
Jan  2 09:18:28 niner kernel: end_request: I/O error, dev 16:00 (hdc), sector 60
Jan  2 09:18:43 niner kernel: hdc: DMA interrupt recovery
Jan  2 09:18:43 niner kernel: hdc: lost interrupt
Jan  2 09:18:43 niner kernel: hdc: status timeout: status=0xd0 { Busy }
Jan  2 09:18:43 niner kernel: hdc: status timeout: error=0x00
Jan  2 09:18:43 niner kernel: hdc: drive not ready for command
Jan  2 09:18:43 niner kernel: hdc: ATAPI reset complete

Box info: http://bugsplatter.mine.nu/test/boxen/niner/ this is same 
box I tickled an oops out of under 2.6.14.5 playing with the CDROM.

Thanks,
Grant.
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