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 /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. Seek times: 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 Transfer rates: 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 @: http://bsdtalk.blogspot.com/ http://freebsdforall.blogspot.com/ _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
