Buffalo Linkstation Pro LS-320GL: xfs_info /mnt/sda2

$ xfs_info /mnt/sda2

meta-data=/dev/sda2              isize=256    agcount=4, agsize=31126 blks
         =                       sectsz=512   attr=0
data     =                       bsize=4096   blocks=124503, imaxpct=25
         =                       sunit=0      swidth=0 blks, unwritten=1
naming   =version 2              bsize=4096  
log      =internal               bsize=4096   blocks=8192, version=1
         =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=65536  blocks=0, rtextents=0

$ xfs_repair -n /dev/sda2

- creating 2 worker thread(s)
Phase 1 - find and verify superblock...
        - reporting progress in intervals of 15 minutes
Phase 2 - using internal log
        - scan filesystem freespace and inode maps...
        - 00:38:12: scanning filesystem freespace - 4 of 4 allocation groups done
        - found root inode chunk
Phase 3 - for each AG...
        - scan (but don't clear) agi unlinked lists...
        - 00:38:12: scanning agi unlinked lists - 4 of 4 allocation groups done
        - process known inodes and perform inode discovery...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - 00:38:30: process known inodes and inode discovery - 29568 of 29568 inodes done
        - process newly discovered inodes...
        - 00:38:30: process newly discovered inodes - 4 of 4 allocation groups done
Phase 4 - check for duplicate blocks...
        - setting up duplicate extent list...
        - 00:38:30: setting up duplicate extent list - 4 of 4 allocation groups done
        - check for inodes claiming duplicate blocks...
        - agno = 0
        - agno = 1
        - agno = 2
        - agno = 3
        - 00:38:30: check for inodes claiming duplicate blocks - 29568 of 29568 inodes done
No modify flag set, skipping phase 5
Phase 6 - check inode connectivity...
        - traversing filesystem starting at / ... 
        - 00:38:47: traversing filesystem - 4 of 4 allocation groups done
        - traversal finished ... 
        - traversing all unattached subtrees ... 
        - traversals finished ... 
        - moving disconnected inodes to lost+found ... 
Phase 7 - verify link counts...
        - 00:38:57: verify link counts - 29568 of 29568 inodes done
No modify flag set, skipping filesystem flush and exiting.