Regarding the 12-drive bay we have, I'm seeing some puzzling performance. The drives are physically so in the bay:
e h k n f i l o g j m p I configured mirrors across e+f and g+h, and both synced at the same, quick/expected speed. These are my four sas drives. The rest are sata. If I configure a mirror with o+p, or m+n they both sync at between 50 and 80MB/s--very quick and within expectations. However, if I configure a mirror with drives i+j, it syncs at <25MB/s. If I configure a mirror with either i+p or j+p, it syncs at between 50 and 80MB/s--so it doesn't appear to be either drive i or drive j at fault, but their combination... This doesn't make sense to me, especially where they are all point-to-point devices. Is there some weird way that sas/sata addressing can affect this? /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
