Hello XFS team,
I'm working on ReaR project (https://github.com/rear/rear) which aims for
bare-metal disaster recovery.
Lately Iʼve run across behavior of mkfs.xfs which I donʼt really know if
is correct or not.
The thing is that when I try to create XFS file system with xfsprogs-4.5.0
following commands runs just fine:
mkfs.xfs -f -i size=512 -d agcount=4 -s size=512 -i attr=2 -i
projid32bit=1 -m crc=1 -m finobt=1 -b size=4096 -i maxpct=25 -d sunit=0 -d
swidth=0 -l version=2 -l sunit=0 -l lazy-count=1 -n size=4096 -n version=2
-r extsize=4096 <destination>
when I try same command with xfsprogs-4.10.0, I get following error:
Illegal value 0 for -l sunit option. value is too small
In ReaR we are trying to backup whole OS and recreate it closest to
original as possible, so I was collecting data obtained from xfs_info and
used them during recovery phase. This approach would unfortunately not
work any more, since I can't use (at least) log sections "sunit=0 blks"
and pass it back to mkfs.xfs ...
Is there some (correct) way how I could save options that were used during
XFS file system creation and use them later, during recovery phase?
Thx in advance for your inputs!
Best regards
Vlado
