Comment by linsomniac

Back when the first Intel SSDs were coming out, I worked with an ISP that had an 8 drive 10K RAID-10 array for their mail server, but it kept teetering on the edge of not being able to handle the load (lots of small random IO).

As an experiment, I sent them a 600GB Intel SSD in laptop drive form factor. They took down the secondary node, installed the SSD, and brought it back up. We let DRBD sync the arrays, and then failed the primary node over to this SSD node. I added the SSD to the logical volume, then did a "pvmove" to move the blocks from the 8 drive array to the SSD, and over the next few hours the load steadily dropped down to nothing.

It was fun to replace 8x 3.5" 10K drives with something that fit comfortably in the palm of my hand.