We have 2 Dell boxes with the Perc H700 Raid Controller. One box has 6 x 600G disks configured as a single Raid 10 volume The other box has 12 x 600G disks configured as a single Raid 10 volume
I did a simple dd test by writing a file 2 x size of RAM ..I also avoided linux OS caching effects by writing another file the size of RAM before reading the original file I wrote.
I got similar write speeds in both boxes (about 350 -400MB/s)
I got a read speed of 590MB/s on the 6 disk box and 723 MB/sec on the 12 disk box.
I was curious if the doubling of disks should result in an approximate doubling of read speeds.