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SubjectRe: UDMA(66) drive coming up as UDMA(33)?
"David St.Clair" wrote:
> I'm trying to get my hard drive to use UDMA/66. I'm thinking the cable
> is not being detected. When the HPT366 bios is set to UDMA 4; using

I think that should be UDMA 5 for 66? As far as I can remember UDMA4 is 33MHz with S.M.A.R.T. which
add some reporting functionality. But I might be wrong...

> hdparm -t, I get a transfer rate of 19.51 MB/s. When the HPT366 bios is
> set to PIO 4 the transfer rate is the same. Is this normal for a UDMA/66
> drive? What makes me think something is wrong is that the log says
> "ide2: BM-DMA at 0xbc00-0xbc07, BIOS settings: hde:pio" <-- PIO?
> and
> "hde: 27067824 sectors (13859 MB) w/371KiB Cache, CHS=26853/16/63,
> UDMA(33)" <--- UDMA(33)? shouldn't it be UDMA(66)?

I got (kernel 2.2.18):

HPT370: IDE controller on PCI bus 00 dev 98
HPT370: chipset revision 3
HPT370: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xe800-0xe807, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xe808-0xe80f, BIOS settings: hdc:DMA, hdd:pio

hda and hdc are my hd's. My mainboard is a Abit KT7-RAID.

> Any ideas what might be wrong? Possible bug?

I would set the UDMA5 for the HDs in the HPT bios.

good luck,
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