続BUFFALO LinkStationでTime Machineができない！

system.logを確認したら以下のようなエラー。

Dec 12 01:38:01 2 /System/Library/CoreServices/backupd[430]: Backup requested by user
Dec 12 01:38:01 2 /System/Library/CoreServices/backupd[430]: Starting standard backup
Dec 12 01:38:01 2 /System/Library/CoreServices/backupd[430]: Network mountpoint /Volumes/backup not owned by backupd... remounting
Dec 12 01:38:01 2 kernel[0]: AFP_VFS afpfs_mount: /Volumes/backup-1, pid 431
Dec 12 01:38:01 2 /System/Library/CoreServices/backupd[430]: Network volume mounted at: /Volumes/backup-1
Dec 12 01:38:01 2 /System/Library/CoreServices/backupd[430]: Creating disk image /Volumes/backup-1/yutacar-mb_000000000000.sparsebundle
Dec 12 01:38:10 2 NasNavigator2[474]: execute:  start
Dec 12 01:38:10 2 NasNavigator2[474]: execute:  start
Dec 12 01:38:15 2 kernel[0]: hfs: Initializing the journal (joffset 0xe53000 sz 0x2800000)...
Dec 12 01:38:20 2 NasNavigator2[474]: OK. Complete to scan drives.
Dec 12 01:38:20 2 NasNavigator2[474]: execute:  end
Dec 12 01:38:20 2 NasNavigator2[474]: execute:  start
Dec 12 01:38:20 2 NasNavigator2[474]: execute:  end
Dec 12 01:38:20 2 NasNavigator2[474]: execute:  end
Dec 12 01:38:30 2 com.apple.KernelEventAgent[36]: KernelEventAgent: sysctl_queryfs: No such file or directory
Dec 12 01:38:32 2 /System/Library/CoreServices/backupd[430]: Error 45 creating backup disk image
Dec 12 01:38:32 2 /System/Library/CoreServices/backupd[430]: Failed to create disk image 
Dec 12 01:38:37 2 /System/Library/CoreServices/backupd[430]: Backup failed with error: 20
Dec 12 01:38:37 2 kernel[0]: AFP_VFS afpfs_unmount: /Volumes/backup-1, flags 0, pid 483
Dec 12 01:38:37 2 /System/Library/CoreServices/backupd[430]: Ejected Time Machine network volume.

ぐぐっても有効な情報がないです。
なにが原因だろ？
謎だ。
引き続き色々やってみたいと思います。