On Fri, Jan 24, 2014 at 08:56:02AM -0600, Matt Garman wrote:

On Fri, Jan 24, 2014 at 6:04 AM,  [off-list ref] wrote:

quoted

The reading is not balanced because it does not make sense to do balanced
reads for sequential reading. In RAID-1 the disk sectors are consequitive.
So if you would read one sector from one disk, and the following sector from the other disk,
then the next read from disk 1 would need to skip a full resolvation of the disk,
which may cost something like 8 ms.  So better read contigously from the same disk, and hope
for some other IO request that can use disk 2.

Does that rationale hold for SSDs?

No, this is not relevant for SSDs as access time is almost zero.

best regards
keld