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 Notice the 7MB write speed compared to 30MB. The read speeds are still very slow considering these are SCSI drives (I've done another test on S-ATA drive and it had the same Read speed, but much slower write). I believe the drives are working fine, I don't suspect problems with them. However, smartmontools doesn't support Adaptec RAID. Anything suggested to imrpove the RAID-5 performance ? It is surprising both tests were ran against the same card. Thanks, Tamouh Hakmi _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"