Poor Raid5 Performance with RocketRaid 1640
Posted on 2007-10-16
Background information: I have a small file server setup, which includes a Pentium4 3.0GHz, and 3 Seagate 500GB SATAII Hard drives (yes, the jumpers are set to limit to 1.5 instead of 3gb), and 1 RocketRaid Internal HBA. The Raid card is a RocketRaid 1640, which does Raid5, however the performance of it is poor. My understanding is that the parity calculation is not done on this card, but instead is offloaded to the CPU. Essentially, since the parity is offloaded, I am only getting 15MB/sec write speed.
My question is, does anyone have any experience with this particular model, or any other Highpoint cards? I'm looking for a new controller (preferably PCI-Express x1 or PCI), which will give me a significant gain in read/write speeds.
Thanks in advance!