Particularly now that we have 6 GBps SATA and cheap(ish) 512 GB SSD drives, the I/O differential can be enormous.
I thought about putting four 512 GB SSDs drives in a Raid 10, which would give me striping performance levels without losing the mirror, but that seemed like a bit too much overkill. These servers have 4 front drive bays, only 2 are filled with the SSD mirror, so we could decide to drop in 2 more drives and rebuild the array if we need even more I/O perf.
I thought about putting four 512 GB SSDs drives in a Raid 10, which would give me striping performance levels without losing the mirror, but that seemed like a bit too much overkill. These servers have 4 front drive bays, only 2 are filled with the SSD mirror, so we could decide to drop in 2 more drives and rebuild the array if we need even more I/O perf.