http://oss.sgi.com/bugzilla/show_bug.cgi?id=793
Summary: mkfs: can't specify agcount with su,sw
Product: Linux XFS
Version: Current
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: xfsprogs
AssignedTo: xfs-master@xxxxxxxxxxx
ReportedBy: peter@xxxxxxxxx
xfsprogs 2.9.8-1 on AMD64 Ubuntu.
sudo /sbin/mkfs.xfs -N -f -L home -i attr=2,maxpct=16 -l lazy-count=1,su=64k
/dev/sdb2 -d su=64k,sw=6,agcount=8
Allocation group size (71635446) is not a multiple of the stripe unit (16)
sunit=16 and swidth=96 are equivalent to su=64k,sw=6, but obviously mkfs code
doesn't do everything the same when it has to convert from su,sw. In fact, it
reduces su from 16 to 2 blocks!
sudo /sbin/mkfs.xfs -N -f -L home -i attr=2 -l lazy-count=1,su=64k /dev/sdb2 -d
sunit=16,swidth=96,agcount=8
meta-data=/dev/sdb2 isize=256 agcount=8, agsize=71635446 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=573083565, imaxpct=5
= sunit=2 swidth=12 blks
naming =version 2 bsize=4096
log =internal log bsize=4096 blocks=32768, version=2
= sectsz=512 sunit=16 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
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