xfsdump: too many -f arguments: maximum is 1 when running in miniroot

[Ryan Taylor <rptaylor@uvic.ca>]

Hello,

I have a CentOS6 system with kernel 2.6.32-696.23.1.el6.x86_64 and xfsdump-3.0.4-4.el6_6.1.x86_64
(the latest available versions).

When I try to xfsdump I get this error:

$ sudo xfsdump -d 2000 -l 0 -p 30 -L Dump -f /mnt/data2/l0/file0 -f /mnt/data2/l0/file1 /mnt/data1
xfsdump: too many -f arguments: maximum is 1 when running in miniroot
xfsdump: usage: xfsdump [ -a (dump DMF dualstate files as offline) ]
                        [ -b <blocksize> ]
                        [ -c <media change alert program>  ]
                        [ -d <dump media file size>  ]
                        [ -e (allow files to be excluded) ]
                        [ -f <destination> ... ]
                        [ -h (help) ]
                        [ -l <level> ]
                        [ -m (force usage of minimal rmt) ]
                        [ -o (overwrite tape) ]
                        [ -p <seconds between progress reports> ]
                        [ -q <use QIC tape settings> ]
                        [ -s <subtree> ... ]
                        [ -t <file> (use file mtime for dump time ]
                        [ -v <verbosity {silent, verbose, trace}> ]
                        [ -z <maximum file size> ]
                        [ -A (don't dump extended file attributes) ]
                        [ -B <base dump session id> ]
                        [ -E (pre-erase media) ]
                        [ -F (don't prompt) ]
                        [ -I (display dump inventory) ]
                        [ -J (inhibit inventory update) ]
                        [ -L <session label> ]
                        [ -M <media label> ... ]
                        [ -O <options file> ]
                        [ -R (resume) ]
                        [ -T (don't timeout dialogs) ]
                        [ -Y <I/O buffer ring length> ]
                        [ - (stdout) ]
                        [ <source (mntpnt|device)> ]
xfsdump: Dump Status: ERROR

(I need to produce multiple dump files in order to migrate some data under space constraints.
I was planning to produce the dump files on an ext4 filesystem (since you can shrink that), and
restore 1 dump file at a time. After restoring each dump file, I can delete it, shrink the ext4
filesystem to reclaim space, and expand the destination XFS filesystem.)

Why does it think I am running in miniroot? How can this error be avoided?

Thanks,
-rt

-- 
Ryan Taylor
Research Computing Specialist
Research Computing Services, University Systems, University of Victoria