On 02/01/2013 01:49 PM, Chris Murphy wrote: > > On Feb 1, 2013, at 11:19 AM, Phil Turmel <philip@xxxxxxxxxx> wrote: > >> On 02/01/2013 01:16 PM, Roman Mamedov wrote: >>> >>> --layout=preserve will make it an order of magnitude faster. Read "man mdadm" >>> for more details. (And "man md" to learn about things in general.) >> >> But will leave the array "unbalanced"--the 7th drive will never be used >> for reads in normal (non-degraded) operation--reducing read performance. > > Does this option mean, in effect, the 7th disk is just a parity disk? So, sorta like a hybrid RAID 5/RAID4. Yes, with just the Q left on the 7th disk. The remainder of the array is the normal raid5 stripe. See the manpage for the layout "left-symmetric-6". Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
