ATAPI / DMA Errors and lockup
Paul Cassell
pmcassel at ncsu.edu
Tue May 25 07:54:59 UTC 2004
I get 3-5 second freezes every now and then (thank god they arent too
frequent). Here is some info from /var/log/messages...
localhost kernel: hdc: status error: status=0xd8 { Busy }
localhost kernel: hdc: status error: error=0x04Aborted Command
localhost kernel: hdc: ATAPI reset complete
localhost kernel: hdc: request sense failure: status=0x51 { DriveReady
SeekComplete Error }
localhost kernel: hdc: request sense failure: error=0x04Aborted Command
Now I dont know weather dma is disabled on boot for this hard drive, but
all other drives have dma enabled. I turn dma on for hdc because thats
my dvd player. Not sure weather this error is turning off dma, at one
point I thought I saw something in messages about this. Life is hard
when you watch dvd's without dma...slowness.
Here is output from /proc/ide/hdc/model & /proc/ide/hdc/settings
Pioneer DVD-ROM ATAPIModel DVD-120S
name value min max mode
---- ----- --- --- ----
current_speed 66 0 70 rw
dsc_overlap 1 0 1 rw
ide-scsi 0 0 1 rw
init_speed 12 0 70 rw
io_32bit 0 0 3 rw
keepsettings 0 0 1 rw
nice1 1 0 1 rw
number 2 0 3 rw
pio_mode write-only 0 255 w
unmaskirq 0 0 1 rw
using_dma 0 0 1 rw
Google search says possibility of driver errors due to via (which is
what chipset i've got on the mobo). Also says to disable dma, but I
dont believe this has an effect. Most of this on google is unresolved.
Any ideas? Ill do a dmesg from kernel startup if necissary. Thanks.
--
Paul Cassell
pmcassel at ncsu.edu
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