On Thu, 11 Nov 1999, Jim Morris said:
JM>I think the HPT-366 will be usable maybe a few months down the road -
JM>but for the moment, I can only recommend using the primary UDMA-33
JM>controller(s). I am running software RAID-1 on hda and hdc (two IBM
JM>18GB 7200 RPM drives), and getting excellent performance. I expect
JM>within a year to be adding two more drives - and hopefully the HPT-366
JM>will be better supported by then. If not, I guess I will be spending
JM>a little more on SCSI drives (I've got Ultra-SCSI already for my
JM>12/24GB DDS3 tape drive and SCSI CD-ROM).
Having just done exactly the same thing I have to echo this sentiment. I
have two 13.6GB IBM UDMA drives using RAID1 but the UDMA-33 controllers were
it for me as well. What I did do was do some tweaking with hdparm and now I
have some tweaked settings written into the tail end of rc.local. That did
improve performance by itself. Here's what I have:
hdparm -m16 /dev/hda
hdparm -m16 /dev/hdc
hdparm -d1 /dev/hda
hdparm -d1 /dev/hdc
hdparm -c3 /dev/hda
hdparm -c3 /dev/hdc
hdparm -W1 /dev/hda
hdparm -W1 /dev/hdc
This made a big performance difference for me. It was the kind of difference
which you could feel with your hands, if you know what I mean! Quite simply
better responsiveness, faster prompt returns after starting a foreground
process which requires disk reads/writes etc. etc. etc.
So far as UDMA-66 support goes... "Not Today!" (but soon, I'm sure).
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