Re: IDE drive data transfer rates, kernel optimization?

Miquel van Smoorenburg (miquels@cistron.nl)
6 Aug 1998 13:19:43 GMT

In article <199808060643.IAA00557@cave.BitWizard.nl>,
Rogier Wolff <R.E.Wolff@BitWizard.nl> wrote:
>In practise, you get about 5 - 10 Mb per second out of one disk, and
>the next disk needs to be on a different controller to get any decent
>performance out of the two.
>
>My Quantum gets about 5.7Mb per second on the first 100Mb:
>
>time dd if=/dev/hda of=/dev/null bs=1024k count=100
>-> 17.95 seconds "elapsed time".

# time dd if=/dev/hda of=/dev/null bs=1024k count=100
-> 7.89 seconds "elapsed time".

That's 12 MB/sec ;) [Actually "hdparm -t /dev/hda" gives the same results
and is lots easier to use]

hda: Maxtor 90840D6, 8010MB w/256kB Cache, CHS=1021/255/63, UDMA

Not bad huh?

Mike.

-- 
 Miquel van Smoorenburg | Our vision is to speed up time,
    miquels@cistron.nl  |   eventually eliminating it.     <*>


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.altern.org/andrebalsa/doc/lkml-faq.html