hdparm weirdness

[armitage@freaks.com (Brandon High)]

I just tried making some adjustments via hdparm, and the unexpected
happened. I enabled multicount transfers and 32bit w/ sync (dma was enabled
by the 440BX chipset) and things slowed down.

it went from:
# hdparm -Tt /dev/hda

/dev/hda:
 Timing buffer-cache reads:   128 MB in  1.10 seconds =116.36 MB/sec
  Timing buffered disk reads:  64 MB in  3.49 seconds = 18.34 MB/sec

to:
# hdparm -Tt /dev/hda

/dev/hda:
 Timing buffer-cache reads:   128 MB in  3.27 seconds = 39.14 MB/sec
  Timing buffered disk reads:  64 MB in  5.32 seconds = 12.03 MB/sec

Anyone else with a 440BX have hints for tuning via hdparm?

-B
 
-- 
Brandon High                                     armitage@freaks.com
If we really needed to find Jesus his face would be on milk cartons.