On Thu, Dec 25, 2008 at 06:46:37PM -0500, Justin Piszcz wrote: > On Fri, 26 Dec 2008, Michal Soltys wrote: > >> I am not worried about the filesystem as the defaults usually get it right > >> but with parted, this is the first time I had to use it for home use and > >> with RAID-6 I am noticing slower performance with 15 disks (1 is a spare) > >> in RAID-6 (albeit slower 7200 ones, RE3s) than I was getting with 10 > >> raptor150s in RAID-6 (but I had used fdisk there). > >> > >> Justin. > >> > > > > For best effect - partition should start at 1920th sector (stripe width > > boundary), and su/sw should be appropriately set - su=64k,sw=13 in your > > case. Parted shows the values normally - from the beginning of the volume, 0 > > based. > > > > > > ps. > > > > I dropped some of CCs. > > Thanks. It looks like you made why big partition. Why bother with partitioning at all? If you just use the whole device, you _will_ be aligned properly if you tell mkfs.xfs about the stripe unit/width. Josef 'Jeff' Sipek. -- All science is either physics or stamp collecting. - Ernest Rutherford -- 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
