On another note, I've ran diskinfo test and these are the results, much better but still the RAID-5 slower than a single drive:
impala# diskinfo -t aacd1 aacd1 512 # sectorsize 146781044736 # mediasize in bytes (137G) 286681728 # mediasize in sectors 17845 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 3.291258 sec = 13.165 msec Half stroke: 250 iter in 2.362839 sec = 9.451 msec Quarter stroke: 500 iter in 3.908358 sec = 7.817 msec Short forward: 400 iter in 2.478195 sec = 6.195 msec Short backward: 400 iter in 2.459182 sec = 6.148 msec Seq outer: 2048 iter in 0.661217 sec = 0.323 msec Seq inner: 2048 iter in 0.637923 sec = 0.311 msec Transfer rates: outside: 102400 kbytes in 1.659174 sec = 61717 kbytes/sec middle: 102400 kbytes in 1.763043 sec = 58081 kbytes/sec inside: 102400 kbytes in 2.867523 sec = 35710 kbytes/sec impala# diskinfo -t aacd0 aacd0 512 # sectorsize 293561434112 # mediasize in bytes (273G) 573362176 # mediasize in sectors 35690 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 2.966840 sec = 11.867 msec Half stroke: 250 iter in 2.270758 sec = 9.083 msec Quarter stroke: 500 iter in 4.493850 sec = 8.988 msec Short forward: 400 iter in 2.681128 sec = 6.703 msec Short backward: 400 iter in 1.520458 sec = 3.801 msec Seq outer: 2048 iter in 0.631963 sec = 0.309 msec Seq inner: 2048 iter in 0.625584 sec = 0.305 msec Transfer rates: outside: 102400 kbytes in 2.139737 sec = 47856 kbytes/sec middle: 102400 kbytes in 3.080063 sec = 33246 kbytes/sec inside: 102400 kbytes in 4.358889 sec = 23492 kbytes/sec > > Hello, > > I've just ran Bonnie on a FreeBSD 5.4 machine with Adaptec > 2230SLP RAID-5 SCSI Card and Seagate 146GB 10K RPM U320 drives. > > The results were very surprising. The RAID-5 is EXTREMELY > slow, and I can't figure out why! > > The RAID controller has two volumes: RAID-5 and a lone drive. > > This is Bonnie results from the lone drive on the Adaptec card: > > impala# ./Bonnie -d /tmp > File '/tmp/Bonnie.30883', size: 104857600 Writing with > putc()...done Rewriting...done Writing intelligently...done > Reading with getc()...done Reading intelligently...done > Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done... > -------Sequential Output-------- ---Sequential > Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- > --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU > K/sec %CPU /sec %CPU > 100 27168 28.2 31668 13.9 36530 10.8 83540 92.1 > 495217 98.5 26086.8 182.8 > > Here are the results doing the same test on the RAID-5: > > impala# ./Bonnie -d /usr > File '/usr/Bonnie.30972', size: 104857600 Writing with > putc()...done Rewriting...done Writing intelligently...done > Reading with getc()...done Reading intelligently...done > Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done... > -------Sequential Output-------- ---Sequential > Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- > --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU > K/sec %CPU /sec %CPU > 100 7478 7.7 10727 4.3 7250 3.2 101910 99.6 > 1464070 99.2 24067.2 180.6 _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"