Sorry wanted to send to performance not current :)
Steve
----- Original Message -----
I've just finished putting together a new server box spec: Dual AMD 244, 2GB ram, 5 * Seagate SATA 400GB on a Highpoint 1820a RAID 5 array. The machine is currently running 5.4-STABLE ( from the weekend ) After install I did some basic tests and the disk is return very poor performance low in fact than a single disk on a bog standard ATA 100 controller:
5.4-STABLE Highpoint 1820a RAID 5 ( 5 disk ) dd if=/dev/da0 of=/dev/null bs=64k count=10000 10000+0 records in 10000+0 records out 655360000 bytes transferred in 13.348032 secs (49097875 bytes/sec)
5.3-RELEASE Highpoint 454 RAID 5 ( 4 disk ) dd if=/dev/da0 of=/dev/null bs=64k count=10000 10000+0 records in 10000+0 records out 655360000 bytes transferred in 20.410034 secs (32109697 bytes/sec)
5.2.1-RELEASE Intel ICH3 UDMA100 ( 1 disk ) dd if=/dev/ad0 of=/dev/null bs=64k count=10000 10000+0 records in 10000+0 records out 655360000 bytes transferred in 11.142405 secs (58816745 bytes/sec)
Obviously something is seriously a miss here somewhere as both the RAID 5 arrays a producing less throughput than a single disk.
Where do I start looking?
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