so when I issue the commands

atactl /dev/wd0c readaheadenable
atactl /dev/wd0c writecacheenable

these features should now be turned on. does it show up in identify if
turned off ???

- james

On Tue, 2002-04-02 at 08:55, Alexander Yurchenko wrote:
> 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)

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