CDROM optimizations? Udev ?
Christopher A. Williams
chrisw01 at privatei.com
Fri Nov 5 00:14:40 UTC 2004
On Thu, 2004-11-04 at 09:28 -0700, Kim Lux wrote:
> Could I ask some people to run hdparm on their cdroms and report their
> findings to the list ?
>
> ie: $/sbin/hdparm /dev/hdc (typically, some CDROMs might mount
> elsewhere.)
>
> We've found some CDROMs are not optimized to use 32 bit access and with
> the irq still masked. This might result in poor performance when using
> them as CD Burners or as a ripping source.
>
Mine have the problem.
First drive is a LiteOn 16X Dual Layer DVD+-RW:
/dev/hdc:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO failed: Invalid argument
The Second is a Sony 52X CD-RW:
/dev/hdd:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
HDIO_GETGEO failed: Invalid argument
These are the default settings on my system wrt these drives. HTH...
Cheers,
Chris
--
======================
When the solution is simple,
God is answering.
-- Albert Einstein
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