testing disk "speed" with hdparm -t

[Kevin J. Cummings]

Joachim Backes wrote:

> Testing the speed of /dev/sdb with "hdparm -t /dev/sdb" shows constantly 
> 56 MB/s:

> But testing /dev/sda with "hdparm -t /dev/sda" shows extremly variable 
> values:

> Does somebody have an explanation for this?

Is /dev/sda your "system" disk?  Was your system active during this 
test?  Was anything else writing to /dev/sda at the time of your test????

> Any help is welcome.
> 
> Regards
> 
> Joachim Backes <joachim.backes at rhrk.uni-kl.de>
> 
> http://www.rhrk.uni-kl.de/~backes
> 


-- 
Kevin J. Cummings
kjchome at rcn.com
cummings at kjchome.homeip.net
cummings at kjc386.framingham.ma.us
Registered Linux User #1232 (http://counter.li.org)