Re: Drive access very slow

From: Sandgroper (steveray_at_KNICKERSiinet.net.au)
Date: 05/22/04

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    Date: Sat, 22 May 2004 20:00:39 +0800

    "Michael Gass" <mgass@localhost.localdomain> wrote in message
    news:slrncamstn.44r.mgass@localhost.localdomain...
    > Installed Red Hat 9 on a Pentium III (733 Mhz) with 256 ram.
    > Dual boot set up with Windows 98 on hda1. The linux boot up is
    > very slow - around 20 mins. (Windows 98 boots up and runs normally).
    > Once linux is up it is very slow - just bringing up vi takes
    > around 40 seconds - even at the console and without X running.
    >
    > I think that hdparm might indicate the problem. As you can
    > see below, the timing buffered disk reads are ridiculous.
    > The below readings were done at the console without X.
    >
    > hdparm -tT /dev/hda
    >
    > /dev/hda:
    > Timing buffer-cache reads: 128 MB in 0.87 seconds =147.13 MB/sec
    > Timing buffered disk reads: 64 MB in 134.43 seconds =487.51 kB/sec
    >
    > I ran the above multiple times and all were about the same.
    >
    > Ran smartctl and the disk seems OK.
    >
    > I am at a loss as to what to do. Could it be that my IDE controller
    > (listed below) is not configured correctly with the kernel or
    > drive?
    >
    > Here is more info.
    >
    > IDE interface: Intel Corp. 82801BA IDE U100 (rev 01)
    > (prog-if 80 [Master])
    > Subsystem: Intel Corp.: Unknown device 2411
    > Flags: bus master, medium devsel, latency 0
    > I/O ports at 2460 [size=16]
    >
    > hdparm
    >
    > /dev/hda:
    > multcount = 16 (on)
    > IO_support = 0 (default 16-bit)
    > unmaskirq = 0 (off)
    > using_dma = 1 (on)
    > keepsettings = 0 (off)
    > readonly = 0 (off)
    > readahead = 8 (on)
    > geometry = 1292/240/63, sectors = 19541088, start = 0

    Here is a web page that shows you how to uncripple RH 9 disk reads ,
    apparently RH switched of the DMA settings to be compatible with older
    hardware.

    http://linux.derkeiler.com/Newsgroups/linux.redhat/2003-12/0688.html 

    --
Sandgroper
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