[lkml]   [1998]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Absolutely horrid IDE performance...
    On Thu, 26 Nov 1998, Mark Lord wrote:

    > Nate Thompson wrote:

    > The PIIX4 chip supports UDMA, but not the PIIX or PIIX3
    > (there are multiple versions of Intel "PIIX" chips,
    > and the first version, i82371FB, is called the "PIIX").

    The IDE chip on my older PC-Parnter 520N VX motherboard supports standard
    busmastering.. but not UDMA..

    seen here:

    ide: i82371 PIIX (Triton) on PCI bus 0 function 57
    ide0: BM-DMA at 0xffa0-0xffa7
    ide1: BM-DMA at 0xffa8-0xffaf
    hda: QUANTUM BIGFOOT_CY4320A, 4134MB w/67kB Cache, CHS=527/255/63, DMA
    hdc: Conner Peripherals 170MB - CP30174E, 161MB w/32kB Cache,

    /proc/pci shows the IDE bus on this board as:

    Bus 0, device 7, function 1:
    IDE interface: Intel 82371SB PIIX3 IDE (rev 0).
    Medium devsel. Fast back-to-back capable. Master Capable.
    I/O at 0xffa0.

    The QUANTUM drive will support UDMA but not with my motherboard..
    I do however get 6meg or there abouts out of it..
    (which is pretty good for a Quantum Bigfoot)

    the BIOS is set for PIO mode 4, BusMastering enabled, 32bit access and
    Large block transfer.

    [22:06:12] root:~# hdparm -Tt /dev/hda

    Timing buffer-cache reads: 128 MB in 3.48 seconds =36.78 MB/sec
    Timing buffered disk reads: 64 MB in 9.31 seconds = 6.87 MB/se

    and this is on a P166 with 64meg EDO ram..
    so if you have a faster machine, with a newer motherboard and are getting
    less that that really, your drive is either slow, or the IDE controller on
    it is a little old..

    Regards, Jim.

    __ name: james woodward (jim)
    / . _ _ email:,
    (_/ / / \/ ) www:,
    | The e-mail address of this message is copyright. If you use them for |
    | inappropriate spamming, you agree to pay $5,000 to James Woodward for |
    | every act of misuse and unauthorized reproduction without permission. |

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:45    [W:0.020 / U:34.348 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site