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From: Alexander Yurchenko (grangert.mipt.ru)
Date: Tue Apr 02 2002 - 10:55:12 CST

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    On Tue, Apr 02, 2002 at 08:32:21AM -0800, James A. Peltier wrote:
    > I've tried to enable the read ahead cache and write cache on my drive
    > according to the atactl man page.
    >
    > here is the output
    >
    > joshua# atactl /dev/wd0c identify
    > Model: WDC AC28400R, Rev: 15.01J55, Serial #: WD-WM6280343898
    > Device type: ATA, fixed
    > Device capabilities:
    > ATA standby timer values
    > IORDY operation
    > IORDY disabling
    > Device supports following standards:
    > ATA-1 ATA-2 ATA-3 ATA-4
    > Device supports the following command sets:
    > READ BUFFER command
    > WRITE BUFFER command
    > read look-ahead
    > write cache
    > Power Management feature set
    > SMART feature set
    > joshua#
    >
    > does it mean that the read look-ahead and write cache are enabled?? if

    No, it means that they're _supported_. All that _enabled_ for your drive
    atactl(8) lists after the string
    `Device has enabled the following command sets/features:'

    > so than why does it not say read look-ahead feature set and write cache
    > feature set?

    There's no term `read look-ahead feature set', it's a command set.

    >
    > TIA
    >
    > - James 

    -- 
   Alexander Yurchenko (aka grange)