Horrible I/O performance on our servers

[Zucarita9000]

RAID 10 has been working very well so far. I'm thinking about upgrading our oldest server (JBOD) to RAID 10, since I have 4 250GB drives not being used.

 

[RebateMonger]

The last time I used RAID 5 was in 2005. I've had to recover WAY too many RAID 5 servers.

I tell clients that if they want reliability, use RAID 1.
If they want reliability plus extra speed, use RAID 10.