On 7/23/06, Nikolas Britton <[EMAIL PROTECTED]> wrote:
On 7/22/06, Richard Collyer <[EMAIL PROTECTED]> wrote:
> Completely ignore me. Write caching wasnt turned on.
Even with write caching off you should be able to hit 50MB/s... did I
missing something? Try running 'diskinfo -t /dev/diskname'. For
refrence here are the numbers from my single 400GB Seagate ST3400832AS
drive, if you can't bet it then something is wrong with your setup:
> diskinfo -t /dev/ad4
512 # sectorsize
400088457216 # mediasize in bytes (373G)
781422768 # mediasize in sectors
775221 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
Full stroke: 250 iter in 5.844998 sec = 23.380 msec
Half stroke: 250 iter in 4.558075 sec = 18.232 msec
Quarter stroke: 500 iter in 7.147166 sec = 14.294 msec
Short forward: 400 iter in 2.253667 sec = 5.634 msec
Short backward: 400 iter in 2.013481 sec = 5.034 msec
Seq outer: 2048 iter in 0.332809 sec = 0.163 msec
Seq inner: 2048 iter in 0.349674 sec = 0.171 msec
outside: 102400 kbytes in 1.503943 sec = 68088 kbytes/sec
middle: 102400 kbytes in 1.688924 sec = 60630 kbytes/sec
inside: 102400 kbytes in 3.021035 sec = 33896 kbytes/sec
To test write speed use dd: 'dd if=/dev/zero of=testfile bs=4m'
^C128+0 records in
127+0 records out
532676608 bytes transferred in 10.840476 secs (49137752 bytes/sec) 46.87MB/s.
BSD Podcasts @:
firstname.lastname@example.org mailing list
To unsubscribe, send any mail to "[EMAIL PROTECTED]"