[plug] dd speed estimates and /dev/hdx grepping

[Derek Fountain]

On Wednesday 22 October 2003 19:03, Ryan wrote:
> Hi pluggers,
>
> Does anyone have *any* idea how long a dd might take in the following
> situation assuming everything is hunky-dory?
>
> Celeron 300 - 128MB RAM, two identical 40GB 7200RPM drives, booted with
> Debian 3.0 CD, dropped to console and:
>
> dd if=/dev/hdd of=/dev/hda

I recently copied a 120GB disk in a very similar manner, including forgetting 
to specifiy a block size. At the default of 512 bytes, each sector takes a 
number of reads and writes to complete. Not terribly efficient. Mine were on 
the same IDE channel which made things a lot worse for me.

It took, IIRC, about 17 hours on an Athlon XP1700 with a gig of RAM and much 
more modern disks than you're using.

-- 
> eatapple
core dump

_______________________________________________
plug mailing list
plug at plug.linux.org.au
http://mail.plug.linux.org.au/cgi-bin/mailman/listinfo/plug