Yeah, this is a classic - i have one breezy box that is a little old , and occasionally the DMA reverts to disabled - performance becomes bog slow. Running hdparm -d 1 /dev/hda fixies it again.
If you do a simple file copy of a large file, you should be able to sustain 5MB/s read and write simultaneously. (10MB/s read or write) On 6/23/06, Martin Pool <[EMAIL PROTECTED]> wrote:
On 23 Jun 2006, Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: > Anyway, it does seem to be spending way too much time in wait and idle > when it should doing some bloody processing. You might want to try changing hdparm parameters; in particular something like sudo hdparm /dev/hda sudo hdparm /dev/hda -u 1 -d 1 I'm told dapper tries to auto-set these, but does so conservatively wrt firmware bugs. It may be too conservative in your case -- or it may be right and your machine actually can't do it. I have caused crashes by setting these but never lost data, but be warned. So you can either just suffer, or set it by hand, or file a bug with hardware details to get the autodetection improved. -- Martin -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
-- Regards, Martin Martin Visser -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
