We're currently running Postgres 7.4.1 on FreeBSD 5.2, a Dual Xeon 2.4, 2GB
ECC, 3Ware Serial ATA RAID 5 w/ 4 disks (SLOW!!).
Cheap solution while you look for another server :
Try to use something other than RAID5.
You have 4 disks, so you could use a striping+mirroring RAID which would boost performance.
You can switch with a minimum downtime (copy files to other HDD, change RAID parameters, copy again...) maybe 1 hour ?
If your hardware supports it of course.
And tell us how it works !
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