even after successfull defragfs AIX gives up...
fs has 290MB used and 1300MB free of total 1600MB
# df -vg /repo
Filesystem GB blocks Used Free %Used Iused Ifree %Iused Mounted on
/dev/mksysblv 1600.00 289.47 1310.53 19% 155 305407221 1% /repo
# chfs -a size=400M /repo
chfs: There is not enough free space to shrink the file system.
# chfs -a size=500M /repo
chfs: There is not enough free space to shrink the file system.
# chfs -a size=600M /repo
chfs: There is not enough free space to shrink the file system.
# chfs -a size=700M /repo
chfs: There is not enough free space to shrink the file system.
# chfs -a size=800M /repo
chfs: There is not enough free space to shrink the file system.
# chfs -a size=900M /repo
chfs: There is not enough free space to shrink the file system.
The must be a bug in AIX LVM?
