[PLUG] lots of coasters

[Russell Senior]

I went to use a Ubuntu Live-CD (5.10) that I burned recently and
discovered that a band of sectors on it were bad.  Trying to burn new
ones resulted in the sectors being bad.  I've burned on three
different burners, one brand new, on two different machines, all
recent linux kernels (2.6.13.2 and 2.6.14), two different brands of
media, and get identical failures.  The burning, executed as follows:

  # cdrecord -v -eject dev=/dev/hdc /src_archive/ubuntu-5.10-live-i386.iso

I also tried setting a lower speed:

  # cdrecord -v -eject speed=16 dev=/dev/hdc /src_archive/ubuntu-5.10-live-i386.iso

all goes without apparent problem.  If I immediately push the cdr back
in (or do so later) and run:

  # md5sum /dev/hdc

after a while I get errors like the following in /var/log/messages:

  Nov 21 22:50:15 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:15 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:15 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:15 celilo kernel: end_request: I/O error, dev hdc, sector 1285056
  Nov 21 22:50:19 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:19 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:19 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:19 celilo kernel: end_request: I/O error, dev hdc, sector 1285060
  Nov 21 22:50:22 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:22 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:22 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:22 celilo kernel: end_request: I/O error, dev hdc, sector 1285064
  Nov 21 22:50:26 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:26 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:26 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:26 celilo kernel: end_request: I/O error, dev hdc, sector 1285068
  Nov 21 22:50:30 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:30 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:30 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:30 celilo kernel: end_request: I/O error, dev hdc, sector 1285072
  Nov 21 22:50:33 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:33 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:33 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:33 celilo kernel: end_request: I/O error, dev hdc, sector 1285076
  Nov 21 22:50:37 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:37 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:37 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:37 celilo kernel: end_request: I/O error, dev hdc, sector 1285080
  Nov 21 22:50:41 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:41 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:41 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:41 celilo kernel: end_request: I/O error, dev hdc, sector 1285084
  Nov 21 22:50:44 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:44 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:44 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:44 celilo kernel: end_request: I/O error, dev hdc, sector 1285088
  Nov 21 22:50:48 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:48 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:48 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:48 celilo kernel: end_request: I/O error, dev hdc, sector 1285092
  Nov 21 22:50:52 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:52 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:52 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:52 celilo kernel: end_request: I/O error, dev hdc, sector 1285096
  Nov 21 22:50:55 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:55 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:55 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:55 celilo kernel: end_request: I/O error, dev hdc, sector 1285100
  Nov 21 22:50:59 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:50:59 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:50:59 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:50:59 celilo kernel: end_request: I/O error, dev hdc, sector 1285104
  Nov 21 22:51:03 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:51:03 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:51:03 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:51:03 celilo kernel: end_request: I/O error, dev hdc, sector 1285108
  Nov 21 22:51:07 celilo kernel: hdc: command error: status=0x51 { DriveReady SeekComplete Error }
  Nov 21 22:51:07 celilo kernel: hdc: command error: error=0x54 { AbortedCommand LastFailedSense=0x05 }
  Nov 21 22:51:07 celilo kernel: ide: failed opcode was: unknown
  Nov 21 22:51:07 celilo kernel: end_request: I/O error, dev hdc, sector 1285112

and md5sum errors out with:

  md5sum: /dev/hdc: Input/output error

It is notable that the range of sectors involved is identical in all
four of the coasters I've burned.  I've googled around and not found a
specific resolvable problem.  Anyone able to drop a large clue on me?


-- 
Russell Senior         ``I have nine fingers; you have ten.''
seniorr at aracnet.com