Jan:
Thanks for the info. But are you using a Promise Ultra66 or and Ultra33?
Does the Promise card pre-boot screen show the card and drives are in UDMA
mode 4? Mine does, but I still do not think it is carrying over to Linux
since if I shut off UDMA66 with the IBM program, put a regular 40 conductor
cable on the card/drive, or connect it to the regular IDE interface on the
motherboard (UDMA33) I still get 17MB/sec. I would think I should get
something like you mention below, 23-24MB/sec, double the plain jane WD 4gig
DMA33 drive.
You wrote:
>I didn't do any of that. I do have CONFIG_IDEDMA_AUTO=y and
>IDEDMA_PCI_EXPERIMENTAL=y, CONFIG_BLK_DEV_IDEDMA=y,
CONFIG_BLK_DEV_PDC202XX=y,
>and PDC202XX_FORCE_BURST_BIT=y.
>
I thought the PDC202XX_FORCE_BURST_BIT=y was only for the Ultra 33 card. At
least that was what I gathered from reading the help during "make
menuconfig" and in the PDC202XX.c file so I did not turn it on. Maybe I'll
give that a try. I also have the other options on, but not the
FORCE_BURST_BIT.
You wrote:
>I got some new, pre-production, Seagate ST328040A, 7200rpm 28GB ATA-4
drives.
>Using bonnie, I get sustained block reads at 24MB/s on the outer cylinders,
>and almost 18MB/s on the inner ones. This is the fastest sustained rate
>I've personally seen on any drive, ATA or SCSI. I suppose there are
>faster drives out there, I just haven't seen them.
>
>But I didn't check them on udma-33.
Where does one get the bonnie program? I have seen it referenced, but could
not track it down... I would think if you turned on UDMA33 and then UDMA66
(if indeed you are getting UDMA66) you should be able to see a difference.
My problem is if I just turn on any DMA (hdparm -d1 /dev/hdg) it jumps from
4MB/sec to 17MB/sec and I can't get past that..so I do not know if I am
really in UDMA66 or not.
Thanks again,
Skip Harrison
[EMAIL PROTECTED]
Online Computer Supply
152 NE 70th
Newport, OR 97365
541-265-9612
