Murat Yildizoglu wrote:
>
> Hi,
>
> I have been able to accelerate a little bit my Mandrake 8 and hence Win4lin by
> passing to 32 bits access to mys IDE hard disk.
>
> In fact, I have observed that MDK 8 uses by default the 16 bits access. To
> check yours, query your hard disk using the following command:
>
> hdparm -c /dev/hda (for the first ide disk).
>
> If it indicates that the 16 bits mode is on, you can change it to 32 bits mode
> using the following command:
>
> hdparm -c 3 /dev/hda
>
> This has considerably accelerated my disk access. The switch -c 3 is the most
> compatible one, you can also check the switch -c 2 instead (it seems to only
> work for some ide controllers).
Hmmmmmm.....
Sounds good, but:
>From the hdparm man page:
-c Query/enable (E)IDE 32-bit I/O support. A numeric
parameter can be used to enable/disable
32-bit I/O
support: Currently supported values include
0 to
disable 32-bit I/O support, 1 to enable 32-bit
data
transfers, and 3 to enable 32-bit data
transfers
with a special sync sequence required by
many
chipsets. The value 3 works with nearly all
32-bit
IDE chipsets, but incurs slightly more
overhead.
Note that "32-bit" refers to data transfers
across
a PCI or VLB bus to the interface card
only; all
(E)IDE drives still have only a 16-bit
connection
over the ribbon cable from the interface card.
Note especially that last sentence. Most of us are using an
EIDE interface built into the motherboard, so I don't see
how this would have any effect. I haven't tried it; maybe
I'm wrong? The thing to do would be to run a benchmark
utility before and after.
-Bill-
-----------------------------------------------------------------------
Bill Gurley, Supervisor of Technical Services
Department of Chemistry, University of Tennessee
Knoxville, TN 37996-1600
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