Higher ATA-Mode -> lower speed
Gregory Bond
gnb at itga.com.au
Thu Jan 20 15:37:03 PST 2005
martin hudec wrote:
> amber# dd if=/dev/zero of=/usr/testfile bs=64k count=2000
> 131072000 bytes transferred in 2.546718 secs (51467023 bytes/sec)
>
>
These are not very usefull tests of raw disk bandwith because they use
the filesystem (and are hence subject to the vagiaries of block
allocation, etc) and are not likely to be very repeatable or
comparable. Nore are the big enough or long enough to reduce the
variance of the result or cover one-off spikes (e.g. what if it is
running just when a cron job happens to kick off?)
More information about the freebsd-stable
mailing list