Andres Salazar wrote:
Also.. this Hard disk is marked as 30Gb/sec (384 megabytes / sec) ..
Is it possible to saturate my HD IO and view the traffic /megabyte to
see what is the maximum i can achieve?
You can test the performance with "dd":
a) raw
write: dd if=/dev/zero of=/dev/rsd0z bs=1024k count=1000
read: dd if=/dev/rsd0z of=/dev/null bs=1024k count=1000
Be aware that the write command will of course overwrite the whole
partition/data (e.g. sd0z).
b) file system
Mount the filesystem using whatever options you want to include in the
test, eg. "mount -o noatime,softdep /dev/sd0z /mnt/test"
write: dd if=/dev/zero of=/mnt/test/empty.file bs=1024k count=1000
read: dd if=/mnt/test/empty.file of=/dev/null bs=1024k count=1000
You need/should run "sync" between any write and read test to complete
all writing operations.
Generally you might want to search the archives
(http://marc.info/?l=openbsd-misc), there have been a lot of postings
about any kind of performance issues.
kind regards,
Robert
