Folks,
We've starting (probably with VxFS 5.0) seeing that newly created Veritas file
systems (eg. just ran "mkfs -F vxfs /dev/vx/rdsk/rootdg/junk2") have a "flag"
bit set:
# vxassist make junk 1g
# mkfs -F vxfs /dev/vx/rdsk/rootdg/junk
version 7 layout
2097152 sectors, 1048576 blocks of size 1024, log size 16384 blocks
largefiles supported
# mount -F vxfs /dev/vx/dsk/rootdg/junk /junk
# echo "8192B.p S" | fsdb -F vxfs /dev/vx/rdsk/rootdg/junk | grep flags
flags 4000 mod 0 clean 3c
Previously we would find our file systems with no flag bits set. It must not
be a terribly important flag since it doesn't trigger a normal fsck to clear it:
# umount /junk
# fsck -F vxfs /dev/vx/dsk/rootdg/junk
file system is clean - log replay is not required
# echo "8192B.p S" | fsdb -F vxfs /dev/vx/rdsk/rootdg/junk | grep fl>
flags 4000 mod 0 clean 5a
That said, if you pass the "-o full" option it does clear it:
# fsck -F vxfs -o full /dev/vx/dsk/rootdg/junk
log replay in progress
pass0 - checking structural files
pass1 - checking inode sanity and blocks
pass2 - checking directory linkage
pass3 - checking reference counts
pass4 - checking resource maps
OK to clear log? (ynq)y
flush fileset headers? (ynq)y
set state to CLEAN? (ynq)y
# mount -F vxfs /dev/vx/dsk/rootdg/junk /junk
# echo "8192B.p S" | fsdb -F vxfs /dev/vx/rdsk/rootdg/junk | grep fl>
flags 0 mod 0 clean 3c
So...does anyone know what flag 4000 means? That would be the 14th bit (0100
0000 0000 0000). I've looked through the #include files in both the VRTSvxfs
and VRTSfssdk packages but haven't found a definition of this flag...
And before anyone asks...We have a scanner that picks up file system with
non-zero flags because we had a situation once where a running file system had
been marked for a fullfsck because of an underlying I/O problem (which wasn't
detected till the system rebooted and all the file systems get full fscked).
It's probably nothing...maybe we just watch our systems too closely :)
Cheers,
- Mike.Myers <at> nwdc.net
_______________________________________________
Veritas-vx maillist - Veritas-vx@mailman.eng.auburn.edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx
