CD-ROM media is second only to diskettes as being prone to errors. I
seemingly have a bad CD in my IDE CD drive. I have these entries in my log:
Aug 10 09:45:56 nitpicking kernel: hdc: timeout waiting for DMA
Aug 10 09:45:56 nitpicking kernel: ide_dmaproc: chipset supported ide_dma_timeout
func only: 14
Aug 10 09:45:56 nitpicking kernel: hdc: status timeout: status=0xd0 { Busy }
Aug 10 09:45:56 nitpicking kernel: hdc: drive not ready for command
Aug 10 09:45:56 nitpicking kernel: hdc: ATAPI reset complete
Aug 10 09:46:06 nitpicking kernel: hdc: irq timeout: status=0xd0 { Busy }
Aug 10 09:46:06 nitpicking kernel: hdc: ATAPI reset complete
Aug 10 09:46:21 nitpicking kernel: hdc: irq timeout: status=0xd0 { Busy }
Aug 10 09:46:21 nitpicking kernel: end_request: I/O error, dev 16:00 (hdc), sector
1415756
Aug 10 09:46:21 nitpicking kernel: hdc: status timeout: status=0xd0 { Busy }
Aug 10 09:46:21 nitpicking kernel: hdc: DMA disabled
Aug 10 09:46:21 nitpicking kernel: hdc: drive not ready for command
Aug 10 09:46:21 nitpicking kernel: hdc: ATAPI reset complete
Aug 10 09:46:31 nitpicking kernel: hdc: irq timeout: status=0xd0 { Busy }
Aug 10 09:46:31 nitpicking kernel: hdc: ATAPI reset complete
Aug 10 09:46:46 nitpicking kernel: hdc: irq timeout: status=0xd0 { Busy }
Aug 10 09:46:46 nitpicking kernel: end_request: I/O error, dev 16:00 (hdc), sector
1415760
Aug 10 09:46:46 nitpicking kernel: hdc: status timeout: status=0xd0 { Busy }
Aug 10 09:46:46 nitpicking kernel: hdc: drive not ready for command
Aug 10 09:46:47 nitpicking kernel: hdc: ATAPI reset complete
Aug 10 09:46:57 nitpicking kernel: hdc: irq timeout: status=0xd0 { Busy }
Or maybe it's a bad drive, or a loose cable. I don't know.
What I do know is this: I got the above at 9:45 am Eastern time (along
with many repetitions of the messages shown). It is now 14:25 Eastern,
and not only can't I read from the drive, I can't unmount the CD. And my
system load is running around 2.5 instead of the usual sub-1.
Surely the driver should eventually time out?
I know what process was trying to read from the disk: avidemux. I've
used kill -9 on the process, but it won't exit. I can't modprobe -r the
"cdrom" module from my Debian kernel-image-2.4.20-3-k7, because it's
"busy". Again, surely the process should time out at some point and let
me remove the module?
I assume I'm eventually going to have to reboot to get the drive door
open.
Advice: should I report this as a kernel bug. ("Wishlist: cd-rom device
driver should time out and return control to the user when DMA fails.")
Would it be a bug in the IDE driver, or the CD driver?
I appreciate any help.
--
Carl Fink [EMAIL PROTECTED]
Jabootu's Minister of Proofreading
http://www.jabootu.com
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