Piergiorgio Sartor <piergiorgio.sartor@xxxxxxxx> writes: > As far as I know, but please correct me if > I'm wrong, a Linux md RAID-10 *near* layout, > with 2 devices, has identical data distribution > as a RAID-1 with 2 devices. > Meaning the 2 devices are a mirror. That's correct. > The difference, if I understood it correctly, > is that the RAID-10 has chunks, and hence stripes, > while the RAID-1 does not have stripes. > Furthermore, the read operation on RAID-10 are > interleaved, delivering (for SSDs) double > sequential read speed (for 2 devices), while > the RAID-1 can handle two independent (one per > device) read stream, each with single device > reading speed. No, since the layout is exactly the same as raid1, large sequential reads can not be sent to both drives at the same time. Now a two disk raid-10 in the offset or far layout however, does interleave the data across the drives so they can both be read at the same time to increase throughput.
