I don't know what your budget is, but there are now 10k RPM SATA 150 drives on the market. Their price/performance is impressive. You may want to consider going with a bunch of these instead of SCSI disks (more spindles vs. faster spindles). 3ware makes a hardware raid card that can drive up to 12 SATA disks. I have been told by a few people who have used it that the linux driver is very solid.


Jeff Bohmer wrote:

Just one more piece of advice, you might want to look into a good battery
backed cache hardware RAID controller. They work quite well for heavily
updated databases. The more drives you throw at the RAID array the faster
it will be.

I've seen this list often recommended such a setup. We'll probably get battery-backed write cache and start out with a 4 disk RAID 10 array. Then add more disks and change RAID 5 if more read performance is needed.

- Jeff

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