question on xfs_repair

[<roberto@xxxxxxxx>]

Hi,
I'm running slackware 8.1 with XFS 1.2.0 +acl+quota on kernel 2.4.19 + lvm
1.0.7.

I've a question on xfs_repair.

If I've ran xfs_check on my /var F.S. and I've got no warning messages,
but if I run xfs_repair on the same F.S. I see a strange output (for me):

Phase 1 - find and verify superblock...
Phase 2 - using internal log
        - zero log...
RET 1447051264 writing 512bytes at blkno=1447051264(2826272), 0x813b9d8
RET 1447051776 writing 512bytes at blkno=1447051776(2826273), 0x813b9d8
        - scan filesystem freespace and inode maps...
        - found root inode chunk
Phase 3 - for each AG...
        - scan and clear agi unlinked lists...
        - process known inodes and perform inode discovery...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - agno = 4
        - agno = 5
        - agno = 6
        - agno = 7
        - process newly discovered inodes...
Phase 4 - check for duplicate blocks...
        - setting up duplicate extent list...
        - clear lost+found (if it exists) ...
        - clearing existing "lost+found" inode
RET 13000704 writing 16384bytes at blkno=13000704(25392), 0x8154928
        - marking entry "lost+found" to be deleted
RET 12996608 writing 4096bytes at blkno=12996608(25384), 0x8153900
RET 32768 writing 16384bytes at blkno=32768(64), 0x814c6a0
        - check for inodes claiming duplicate blocks...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - agno = 4
        - agno = 5
        - agno = 6
        - agno = 7
Phase 5 - rebuild AG headers and trees...
RET 13889536 writing 4096bytes at blkno=13889536(27128), 0x80e52c8
RET 13914112 writing 4096bytes at blkno=13914112(27176), 0x80e52c8
RET 512 writing 512bytes at blkno=512(1), 0x80e52c8
....
(the output continue an is quite long)

I run the command several time but the output produced is still strange
for me. (I'll wait for a clean xfs_repair as for xfs_check)

Can anyone explain the meaning of it? and is my file system clean or not?
(I've red the man xfs_repair but it does not explain the "RET ..." strings)

Thanks in advance,
Roberto