Re: DD command
On Fri, Dec 19, 2008 at 08:52:00 -0500, Douglas A. Tutty (dtutty@vianet.ca) wrote:
> On Fri, Dec 19, 2008 at 02:36:45PM +0800, rjubio wrote:
> > How long does a dd command take for an 80 GB IDE hd?
>
> You could use hdparm testing to get the unbuffered speed and then do the
> math.
Thank you for mentioning this Douglas. Another thing learned today!
On a very average PC (1.8 GHz Athlon) I am getting very repeatable
results such as:
# hdparm -t /dev/hda
/dev/hda:
Timing buffered disk reads: 186 MB in 3.03 seconds = 61.49 MB/sec
...and even on a painfully slow Linksys NSLU2 "slug" (which has its
hard drive connected via a USB2 to IDE interface:
# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 32 MB in 3.09 seconds = 10.36 MB/sec
I know from previous timing tests with the Slug that this figure looks
about right.
--
Bob Cox. Stoke Gifford, near Bristol, UK.
Please reply to the list only. Do NOT send copies directly to me.
Debian on the NSLU2: http://bobcox.com/slug/
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