Controller perf shows 50-55MB/sec which is good for this box (I think it's UDMA/33).
My disk performances were roughly 3 and 5 MB/sec. DMA was off. Using my happy script below gained me a fill 3x performance for both disks.
for i in /dev/hda /dev/hdc ; do hdparm $i #get hdparm settings for drive hdparm -i $i #get device statistics hdparm -T $i #test perf of controller (33, 66, 100, 133) hdparm -t $i #test perf of current settings hdparm -d1 $i #enable DMA mode hdparm -a16 $i #enable 16 block reads hdparm -c1 $i #enable 32-bit mode hdparm -m16 $i #enable 16 sector I/O hdparm -k1 $i #enable keep settings over reset hdparm -t $i #test perf of new settings done
I guess I should put that in rc.boot (minus -t, and plus -q)