Time machine cannot access the sparsebundle (error 112)

[noilly]

I am having a problem with my time machine backup, i.e. no backup occurs.

MY NAS details are:

Model: ReadyNAS NV+ [X-RAID]
Firmware: RAIDiator 4.1.10-T3 [1.00a043]
Memory: 256 MB [2.5-3-3-7]
IPv4 address:: 192.168.1.101

When I use Time Machine on my Macbook Pro (running OS X 10.8.1) I am able to select my NAS as a backup disk. It requests my username and password which I provide and it seems to connect successfully. However, it can never 'locate' the backup location.

Time Machine will sit there for a couple of minutes saying "Looking for backup disk..." and will then give the error "The backup disk image "/Volumes/ReadyNAS/Petra.sparsebundle" could not be accessed (error 112)."

An example from my log:

19/09/12 2:16:11.204 AM com.apple.backupd[4341]: Attempting to mount network destination URL: afp://ReadyNAS@pandora.local/ReadyNAS
19/09/12 2:16:16.000 AM kernel[0]: ASP_TCP CheckReqQueueSize: increasing req queue from 32 to 128 entries. so 0xffffff802a267ba0
19/09/12 2:16:17.503 AM com.apple.backupd[4341]: Mounted network destination at mount point: /Volumes/ReadyNAS using URL: afp://ReadyNAS@pandora.local/ReadyNAS
19/09/12 2:16:17.000 AM kernel[0]: ASP_TCP asp_tcp_usr_control: invalid kernelUseCount 0
19/09/12 2:16:17.000 AM kernel[0]: AFP_VFS afpfs_mount: /Volumes/ReadyNAS, pid 4428
19/09/12 2:16:17.000 AM kernel[0]: AFP_VFS afpfs_mount : succeeded on volume 0xffffff81a4ab6008 /Volumes/ReadyNAS (error = 0, retval = 0)
19/09/12 2:16:41.000 AM kernel[0]: hfs_mounthfsplus: BTOpenPath returned (5) getting catalog BT
19/09/12 2:16:41.000 AM kernel[0]: hfs_mounthfsplus: encountered errorr (5)
19/09/12 2:16:41.000 AM kernel[0]: hfs_mountfs: encountered failure 5
19/09/12 2:16:41.000 AM kernel[0]: hfs_mount: hfs_mountfs returned 5
19/09/12 2:16:42.637 AM com.apple.backupd[4341]: Failed to mount disk image: Error Domain=com.apple.backupd.ErrorDomain Code=21 "The operation couldn’t be completed. (com.apple.backupd.ErrorDomain error 21.)" UserInfo=0xXXXXXXXXXXXX {MessageParameters=(
"/Volumes/ReadyNAS/Petra.sparsebundle",
112
)}
19/09/12 2:16:42.879 AM com.apple.backupd[4341]: Ejected Time Machine network volume.

The backup used to work, and then all of a sudden stopped working. It may have been around the time I installed Mountain Lion.

Any help would be greatly appreciated! I have looked everywhere but can't seem to find a solution. This has been going on for almost a month now!

Thanks!

[mdgm-ntgr]

Can you check under Services > Discovery Services that the AFP service is advertised over Bonjour? Have you tried toggling this option off then on again?

[noilly]

AFP was advertised over Bonjour. I toggled this option on and off again and toggled the whole Bonjour service off and on again, but with no luck.

[noilly]

I enabled SSH on the NAS and noticed that 'ReadyNAS' is not a sub-directory under '/'. I created the directory but this didn't solve the issue, so I removed it.

[mdgm-ntgr]

ReadyNAS is a name of a user not an ordinary share.

Can you do?

# ls -la /c/.timemachine

[noilly]

pandora:/# ls -la /c/.timemachine
total 128
drwxr-xr-x    8 ReadyNAS root        16384 Sep 19 11:12 .
drwxrwxrwx   11 root     root        16384 Sep 17 20:36 ..
drwxr-xr-x    2 root     root        16384 Sep 19 11:08 .AppleDB
drwxr-xr-x    2 root     nogroup     16384 Jul  5 23:21 .AppleDesktop
drwxr-xr-x    2 ReadyNAS nogroup     16384 Jul  5 23:22 .AppleDouble
-rw-r--r--    1 ReadyNAS root            0 Jan  8  2011 .com.apple.timemachine.supported
drwxr-xr-x    3 root     nogroup     16384 Jul  5 23:21 Network Trash Folder
drwx--S---    4 ReadyNAS nogroup     16384 Sep 19 11:12 Petra.sparsebundle
drwxr-xr-x    3 root     nogroup     16384 Jul  5 23:21 Temporary Items

[mdgm-ntgr]

Interesting. Can you post output of the following?:

# df -h
# du -csh /c/.timemachine
# repquota -as | grep limits\|User\|ReadyNAS

[noilly]

pandora:/# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hdc1             1.9G  507M  1.4G  26% /
tmpfs                  16k     0   16k   0% /USB
/dev/c/c              5.4T  2.6T  2.8T  47% /c

pandora:/# du -csh /c/.timemachine                                                                                                                                                                       
228G	/c/.timemachine
228G	total

pandora:/# repquota -as | grep limits\|User\|ReadyNAS
                        Block limits                File limits
User            used    soft    hard  grace    used  soft  hard  grace
ReadyNAS  --    228G    500G    500G          58153     0     0  

[mdgm-ntgr]

Issue sounds similar to https://discussions.apple.com/thread/4151006?start=0&tstart=0

[noilly]

I've tried the solutions that I could find on the Apple website: resetting the Time Machine preferences file and connecting via the IP. Nothing has worked!

[noilly]

I deleted the existing backup and everything started working again.

[mdgm-ntgr]

Good. Was the old backup from a prior version of Mac OS X e.g. Lion?

[noilly]

It was from Lion.