I'm well aware of the widespread recommendation that any disk system that is holding a database should not be RAID-5 because of the poor write performance on RAID-5. You can look at BAARF's website to see the arguments over RAID-5 and the problems with it for databases.
I'm building an IDOL indexing server - our first - and I was wondering if people who have experience with IDOL know what the read/write balance is. RAID-5 is faster for read-heavy systems; RAID-10 for write-heavy systems (if more than about 5-10% of your disk accesses are writes, you're better off with RAID-10). I would expect that IDOL does enough writes to justify RAID-10, but I don't actually know and I was hoping someone else here does.
... so the question is: Is an IDOL indexing server likely to perform enough writes to justify RAID-10 over RAID-5?