Carlos, didn't you plan to look into this issue? Goswin, how do you determin that mkfs is still doing unaligned I/O when forcing the large sevtor size? Once we set the sector size XFS can't do I/O smaller than it. On Tue, Feb 28, 2012 at 08:49:14AM +0100, Goswin von Brederlow wrote: > Package: xfsprogs > Version: 3.1.7 > Severity: important > File: /sbin/mkfs.xfs > > Hi, > > since I recently bought a harddisk with 4K sector size I've been > checking for correct alignment and blocksizes in various things. One > of them being xfs. > > When I partition the disk in parted it shows correctly to have a > logical blocksize of 512 byte and physical blocksize of 4096 byte. > But mkfs.xfs does not detect that the physical blocksize is 4096 byte > and creates a filesystem with: > > meta-data=/dev/sde1 isize=256 agcount=32, agsize=22892696 blks > = sectsz=512 attr=2 > data = bsize=4096 blocks=732566272, imaxpct=5 > = sunit=0 swidth=0 blks > naming =version 2 bsize=4096 ascii-ci=0 > log =internal bsize=4096 blocks=357698, version=2 > = sectsz=512 sunit=0 blks, lazy-count=1 > realtime =none extsz=4096 blocks=0, rtextents=0 > > > This often results in access to the disk that is not aligned to the > blocksize with the resulting degradation in performance. > > Further, manually selecting the right sector size of 4096 still causes > lots of unaligned access while formating and while mounting the > filesystem. It does seem to fix the problem for actual use though. > > MfG > Goswin > > -- System Information: > Debian Release: wheezy/sid > APT prefers unstable > APT policy: (500, 'unstable') > Architecture: amd64 (x86_64) > > Kernel: Linux 3.1.0-1-amd64 (SMP w/4 CPU cores) > Locale: LANG=C, LC_CTYPE=de_DE (charmap=ISO-8859-1) > Shell: /bin/sh linked to /bin/dash > > Versions of packages xfsprogs depends on: > ii libblkid1 2.20.1-1 > ii libc6 2.13-21 > ii libreadline5 5.2-11 > ii libuuid1 2.19.1-5 > > xfsprogs recommends no packages. > > Versions of packages xfsprogs suggests: > pn acl 2.2.51-4 > pn attr 1:2.4.46-3 > pn quota <none> > pn xfsdump <none> > > -- no debconf information > > > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs ---end quoted text--- _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
