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    SubjectRe: UDMA 100 / PIIX4 question
    Mark Hahn wrote:
    >
    > > > > I have an IBM DTLA 307030 (ATA 100 / UDMA 5) on an 815e board (Asus CUSL2), which has a PIIX4 controller.
    > > > > ...
    > > > > My problem is that (according to hdparm -t), I never get a better transfer rate than approximately 15.8 Mb/sec....
    > > >
    > > > 15MB/s for hdparm is about right.
    >
    > it's definitely not right: this disk sustains around 35 MB/s.

    The 815e does not use a PIIX4 chipset. My references were to PIIX4
    chipsets.

    > nonsequitur: the controller and disk are both quite capable of
    > sustaining 20-35 MB/s (depending on zone.) here's hdparm output
    > for a disk of the same rpm and density as the DTLA's:
    >
    > Timing buffer-cache reads: 128 MB in 1.07 seconds =119.63 MB/sec
    > Timing buffered disk reads: 64 MB in 2.02 seconds = 31.68 MB/sec
    >
    > (maxtor dm+45, hpt366 controller)
    > regards, mark hahn.

    Again, this is not a PIIX4 chipset.

    rgds,
    tim.
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