Stephan, > Options are: left-asymmetric, left-symmetric, right-asymmetric, > right-symmetric, la, ra, ls, rs. > The default is left-symmetric. > > What is the difference between this ? Please see 'http://www.accs.com/p_and_p/RAID/LinuxRAID.html'. This short web page provides examples of what the different parity algorithms do to the segment layout on the disks. It's easier to read than the code. > and why do i want to use anything else than the default ? There exist situations where production applications would be run against the array. If speed is CRITICAL, you might want to benchmark the parity algorithms. The non-default parity algorithms are more likely to generate a speedup when the I/O is random. I hope this helps. Peter Ashford - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
