On 9/23/14 9:11 PM, Helmut Tessarek wrote: > On 23.09.14 22:07 , Eric Sandeen wrote: >> but! your raid doesn't have a 64k stripe, so that doesn't apply. > > Yep, that's true, but see below. > >> no geometry because md0 raid1 doesn't export any stripe geometry. > > [root@atvie01s ~]# cat /proc/mdstat > Personalities : [raid1] > md0 : active raid1 sdb1[0] sdd1[1] > 3906784064 blocks super 1.2 [2/2] [UU] > bitmap: 0/30 pages [0KB], 65536KB chunk > > So for some reason it shows a 64k chunk size even for RAID1. > > That was what got me confused. Hm, 65536KB sounds like 64MB... Anyway, mkfs.xfs picks up the queue's minimum IO size for sunit, and optimal io size for swidth. So: blkid # blockdev --getiomin --getioopt /dev/md0 (which here returns: 512 0 here) will show you what your raid's queue is actually reporting, and what mkfs.xfs will pick up. -Eric _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
