Time Machine reports issue backing up to Time Capsule

Ever since I have upgraded to 10.6.4, I have been unable to complete a Time Machine backup. My backup volume is contained on a 2TB Time Capsule. Paraphrasing the error message, "Time Machine reports that it is unable to backup due to a problem with the disk, this problem may be temporary, try again later."
Has anyone seen this? Any suggestions?

The exact error message reported:
The Backup was not performed because an error occurred while copying files to the backup disk.
The problem may be temporary. Try again later to back up. If the problem persists, use Disk Utility to repair your backup disk.
I used Disk Utility on the external disk, and also ended up just erasing the volume on this disk, and attempting a fresh backup. Still no go.
The Time Capsule is connected directly to the iMac via Ethernet.

Similar Messages

  • Time machine has stopped backing up to time capsule. message is that sparse bundle is in use

    Time machine suddenly stopped backing up to time capsule returning this message:
    The backup disk image “/Volumes/Data-1/xxnymacbooknamexx MacBook.sparsebundle” is already in use.

    Complex procedure that will almost always solve this bug:
    Pull the power cord from the back of the Time Capsule
    Count to ten
    Plug the power cord back into the back of the Time Capsule
    Wait a few minutes, then try a backup again.

  • Time Machine isn't backing up to Time Capsule

    My Time Machine isn't backing up to my Time capsule.
    I am using OS X 10.8.2 which I believe is the latest version.
    The problem I have is the following error message pops up on my Macbook pro screen :
    Time Machine couldn't complete the backup to "Alec McDermott's Time Capsule".
    The backup disk image "/Volumes/Alec McDermott's
    Time Capsu/Alec McDermott's MacBook
    Pro.sparsebundle" is already in use.
    Any assistance anyone can offer would be very much apprecated.
    Alec

    See here...
    The Backup disk image ... sparsebundle ... is already in use.
    From Pondini’s excellent Information Here...
    http://pondini.org/TM/Troubleshooting.htm

  • Time machine will not back up to time capsule

    Time machine will not back up to my Time Capsule on my MacPro running SnowLeopard. Error message says it cannot access the backup file. I have reset the TC, and erased the drive and I get the same error on initial backup. I can see the volume and drag files to it, so the disk appears OK. What's going on here?

    Depending on exactly what message you get, you might need #C17 in Time Machine - Troubleshooting
    If not, please post the message (a screenshot would be fine).

  • Time Machine won't back up onto Time Capsule

    I upgraded to Mountain Lion last week, and Time Machine won't back up to my Time Capsule. When it fails, I get the message:
    Time Machine couldn't complete the backup to "Tom's Time Capsule".
    The backup disk image "/Volumes/Data/TomsMac.sparsebundle" could not be created (error 60)
    I sometimes get the same message, but with "error 17"
    I also get the following error message popup (even though the disk is the one in my Time Capsule):
    The disk you inserted was not readable by this computer.
    The popup offers three choices: Initialize, Ignore, Eject.
    My local Apple Store Genius concluded that the problem must be with the Time Capsule, so I bought a new one. That didn't fix the problem.
    Time Machine Buddy messages:
    Starting manual backup
    Attempting to mount network destination URL: afp://Tom%[email protected]/Data
    Mounted network destination at mount point: /Volumes/Data using URL: afp://Tom%[email protected]/Data
    Creating disk image /Volumes/Data/TomsMac.sparsebundle
    Error 60 creating backup disk image
    Failed to create disk image /Volumes/Data/TomsMac.sparsebundle, status: 60
    Backup failed with error: 20
    Failed to eject volume /Volumes/Data (FSVolumeRefNum: -108; status: -47; dissenting pid: 0)
    I did Repair Disk Permissions and Verify Disk and everything's OK.
    I erased the Time Capsule using AirPort Utility and did a hard reset on the Time Capsule.
    I did a re-install of Mountain Lion and that didn't fix anything.
    My MacBook Pro is accessing the Time Capsule wirelessly, as it always has.
    Help!

    Just to be sure, we're talking about a Time Capsule -- not an AirPort Extreme connected to an external hard drive. Right?
    If so, proceed as follows.
    Please read this whole message before doing anything.
    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
    The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
    Be sure your Mac is shut down.
    Press the power button.
    Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
    Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
    *Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, you can’t boot in safe mode.
    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
    The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
    Test while in safe mode. Same problem(s)?
    After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

  • Time Machine Won't Back Up to Time Capsule

    I have an iMac 11.2 which was working really well with Time Machine and a 500GB Time Capsule when I was using Moutain Lion.  I then Update my machine to Mavericks (10.9.1) and my problems started.  It wiped everything in my backup and tried to start a new one.  So far it has stalled either in the prep phase or has managed start but is extremely slow - it took over a week to back up 300GB, but could not complete the last 50GB because it kept getting a sparsefile error.  I have tried the following in isolation or in combination :-
    1/  Deleting the plist file
    2/  Running disk utility on the sparse file - no issues found
    3/  Backing up in safe mode
    4/  Deleting the hard drive content and starting again
    5/  Backing up through my LAN rather than WAN - can't even find the drive.
    I have thought about buying a new Time Capsule, but I cannot be sure the problem lies with my current one.  If anybody has any ideas they would be gratefully received.  If not then I can only hope Apple read this and they do something to restore my faith in their operating system.
    Many thanks

    Before you do anything else, if you now have no current backup, back up all data to a USB hard drive.
    If you have more than one user account, these instructions must be carried out as an administrator.
    Launch the Console application in any of the following ways:
    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
    ☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
    Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
    View ▹ Show Log List
    from the menu bar.
    Enter the word "Starting" (without the quotes) in the String Matching text field. You should now see log messages with the words "Starting * backup," where * represents any of the words "automatic," "manual," or "standard." Note the timestamp of the last such message that corresponds to an abnormal backup. Now
    CLEAR THE WORD "Starting" FROM THE TEXT FIELD
    so that all messages are showing, and scroll back in the log to the time you noted. Select the messages timestamped from then until the end of the backup, or the end of the log if that's not clear. Copy them to the Clipboard by pressing the key combination command-C. Paste (command-V) into a reply to this message.
    If all you see are messages that contain the word "Starting," you didn't clear the text field.
    If there are runs of repeated messages, post only one example of each. Don't post many repetitions of the same message.
    When posting a log extract, be selective. Don't post more than is requested.
    Please do not indiscriminately dump thousands of lines from the log into this discussion.
    Some personal information, such as the names of your files, may be included — anonymize before posting.

  • Time Machine "backup failed" Backing up to Time Capsule (first backup)

    I just received my iMac (24", 3.04 ghz, 4 gig ram) a few days ago...my firs Mac, after over 20 years with pc's. All working fairly well, as I try to learn the new format. Attempted my first backup last night using Time Machine, backing to Time Capsule. As I went to bed, it stated it was "preparing". This morning it stated "backup failed". "Time Capsule error". The networking aspects of Time Capsule are working without a problem. Unfortunately, the error message is vague and I'm definitely illiterate when it comes to much of the properties of a Mac. Any suggestions as to how I should proceed in investigating the problem? Thanks!!

    Well, I greatly appreciate the earlier advice. I have learned much in my reading. Of course, now with my "tinkering", I determined that the Time Capsule was not formatted to OS extended (journaled) as was my Macintosh harddrive. (Don't really understand why it would not come that way). I attempted to format using disk utility, now it doesn't show up in that application and under FINDER (shared devices), it is detailed as "sharepoint". I read elsewhere that it was recommended to use airport utility to reformat to OS Extended (journaled). Anyway, of course, now I've gone full circle and am comfused as to the proper way to have it formatted properly and recognized by disk utility. As such, currently I cannot use it for backup.
    Frequently, I'm my worsed enemy! Thanks again for the advice.

  • HT201250 my time machine has stopped backing up on time capsule. It is plugged into my network

    My time machine is set to back up my mac using time capsule.. It has stopped backing up. When I check the icon, says "skip this back up". Before that it said it could not back up. Not sure what changed.
    Said it has not backed up in a month. I cannot access anything to tell me what is going on. Please advise.

    says last back up was Dec 5. Ugh.

  • TS1550 Time Machine is not backing up to Time Capsule.

    I am getting this message: Time Machine could not complete backup. The backup disk image "/Volumes/D's Time Capsule/D's MacBook.sparsebundle" is already in use.

    Switch off in Time Machine. Then remove the TC from Time Machine and from your network. Erase TC with the Airport Confirugarion Utility program. Select "rewrite with zero's". Multi erasing (7x or 35x) only prevent abuse of your back-up data by others. Then reinstall the TC back again to your network and switch on Time Machine and install the erased TC in Time Machine. It should work. Beware, your back-up files will be lost.
    The problem is very likely a corrupt "xxx.inProgress"-file.

  • Time Machine can't back up to Time Capsule because disk is not found

    Hello all. I have been using TC as my router for a few years and backing up to it. I got a new router through my IP which I think might be faster so just want to use TC as backup. However, I'm not sure what I'm doing wrong. I connected the TC to the new router via Ethernet cable but the message says TM can't find it.  I guess I don't understand the logic of what is happening with TC and router.  Is there something special I should be doing. I have always had the TC configured as I was using it both ways. Should I be changing the configuration?
    Macbook Pro.  Running Mavericks. Thanks

    You must reset the TC to factory regardless.. in any new situation it will be lost.. it need to full factory reset and start over.
    A factory reset of the TC is the start.. it is required so you can find it again.
    Factory reset universal
    Power off the TC.. ie pull the power cord or power off at the wall.. wait 10sec.. hold in the reset button.. be gentle.. power on again still holding in reset.. and keep holding it in for another 10sec. You may need some help as it is hard to both hold in reset and apply power. It will show success by rapidly blinking the front led. Release the reset.. and wait a couple of min for the TC to reset and come back with factory settings. If the front LED doesn’t blink rapidly you missed it and simply try again. The reset is fairly fragile in these.. press it so you feel it just click and no more.. I have seen people bend the lever or even break it. I use a toothpick as tool.
    N.B. None of your files on the hard disk of the TC are deleted.. this simply clears out the router settings of the TC.
    Setup the TC again.
    ie Start from a factory reset. No files are lost on the hard disk doing this.
    Then redo the setup from the computer .
    1. Use very short names.. NOT APPLE RECOMMENDED names. No spaces and pure alphanumerics.
    eg TCgen5 and TCwifi for basestation and wireless respectively.
    Even better if the issue is more wireless use TC24ghz and TC5ghz with fixed channels as this also seems to help stop the nonsense. But this can be tried in the second round.
    2. Use all passwords that also comply but can be a bit longer. ie 8-20 characters mixed case and numbers.. no non-alphanumerics.
    3. Ensure the TC always takes the same IP address.. you will need to do this on the main router using dhcp reservation.. or a bit more complex setup using static IP in the TC. But this is important.. having IP drift all over the place when Yosemite cannot remember its own name for 5 min after a reboot makes for poor networking. If the TC is main router it will not be an issue.
    4. Check your share name on the computer is not changing.. make sure it also complies with the above.. short no spaces and pure alphanumeric.. but this change will mess up your TM backup.. so be prepared to do a new full backup. Sorry.. keep this one for second round if you want to avoid a new backup.
    5. Mount the TC disk in the computer manually.
    In Finder, Go, Connect to server from the top menu,
    Type in SMB://192.168.0.254 (or whatever the TC ip is which you have now made static. As a router by default it is 10.0.1.1 and I encourage people to stick with that unless you know what you are doing).
    You can use name.. SMB://TCgen5.local where you replace TCgen5 with your TC name.. local is the default domain of the TC and doesn't change.
    However names are not so easy as IP address.. nor as reliable. At least not in Yosemite they aren't. The domain can also be an issue if you are not plugged or wireless directly to the TC.
    6. Make sure IPv6 is set to link-local only in the computer. For example wireless open the network preferences, wireless and advanced / TCP/IP.. and fix the IPv6. to link-local only.
    Not all of that is necessary.. but at least the factory reset and new naming.. then reset the TM again and select the TC as the location for the backup.
    It will say it is going to start a new backup but it should discover the existing one and after a bit of verification continue from where it left off.

  • Time Machine reported 'volume is read only' & rolled back to old state

    I've been in love with Time Machine ever since Leopard arrived. This has all come crashing down over the last few days...
    Firstly I got a new 1tb drive, so I mirrored my old TM drive (using SuperDuper), and all seemed to be fine – backups were chugging along for a week or so as normal on the new, bigger drive.
    A few days ago I got a time machine error stating that "The backup volume is read only". I thought this was strange as the drive was working without issue for a week. I checked permissions, format, etc and all were set correctly. I restarted and Time Machine kicked back in and all seemed to work fine other the fact that there seemed to be no backups created for 6 hours before I got the error message. Then I made a scary realisation, somehow the files on my computer had been restored to a state from 6 hours prior, all the work I'd done for the morning was gone.
    I put this down to a one off glitch (stupid, stupid, stupid). I've today got the same "backup volume is read only" message again, and this time around my files have been restored to a state from 3 days ago. Fortunately this time around Time Machine has a backup of the important stuff a few hours ago.
    I am now very worried about using the same disk with Time Machine. I also have no idea if Time Machine is the culprit (but logic tells me with the rolling back of files it must be). What should I do? How can I figure out what is going on?

    This may fix the "read only" problem:
    What to do if Time Machine reports you don't have permission
    This was posted in the Apple Discussions by V.K. I have only modified it slightly to be more generic.
    The problem seems to be that 10.5.6 changes permissions on a file so that even the root user doesn't have write peivileges. I have no idea why they did this. The workaround suggested in [an]other post will probably work, too, but i did something less drastic. Instead of deleting the file I changed permissions on it, and it worked just fine. An added benefit is that the permission change seems to stick, so you don't have to delete the file every time you change a drive.
    [Open the Terminal application in your Utilities folder. At the prompt [enter] the following command:
    sudo chmod 644 /volumes/"TM drive name"/.xxxxxxxxxxxx
    The name of the file .xxxxxxxxxxxx is based on the MAC address of your computer and will be different for every computer. Put the name of the TM drive in the above and keep the quotes.
    You'll have to enter your admin password (which you won't see) which is normal.
    This was edited by Kappy just for cleanup.
    Enable Finder to Show Invisible Files and Folders
    Open the Terminal application in your Utilities folder. At the prompt enter or paste the following command line then press RETURN.
    defaults write com.apple.finder AppleShowAllFiles TRUE
    To turn off the display of invisible files and folders enter or paste the following command line and press RETURN.
    defaults write com.apple.finder AppleShowAllFiles FALSE
    Alternatively you can use one of the numerous third-party utilities such as TinkerTool or ShowHideInvisibleFiles - VersionTracker or MacUpdate.

  • HT201250 My Time Machine is not backing up and gives me this error report, 'The backup disk image "/Volumes/Data/Valarie'siMac.sparsbundle" is already in use.  Time machine could not complete backup.    Can anyone help me?

    My Time Machine is not backing up and gives me this error report:
    The backup disk image "/Volumes/Data/Valarie'siMac.sparsbundle" is already in use
    Time Machine could not complete backup
    Can anyone help me?

    Look at the discussion on the following forum:
    https://discussions.apple.com/thread/3882138?start=0&tstart=0
    The responses given there may help.

  • TS3243 The light on my Time Machine disk is on all the time. The back ups still occur OK and without any issues but I need to 'turn off' the light. Any ideas?

    The light on my external Time Machine drive is on all the time. Up until about six onths ago it only came on when it was backing up. The drive is working perfectly and backing up regularly, but the light is driving me mad. I have tried to find an option to put it out but so far have not managed to do it. The drive is a Seagate 1TB Freeagent and has 913 GB free so cannot be anywhere near full. Can anyone offer any advice or guidance to turn the light off?

    I suggest that you contact Seagate technical support.
    Ciao.

  • Time machine not completely backing up certain folders

    Has anyone run into a problem with their Time Machine continually neglecting to backup one or two of their folders?  I know some people have problems with TM not backing up items on their desktop, but my desktop data is fine.  There are just two folders (as far as I know) that TM refuses to back up (unless there are new items, then it will backup only those items).  One is my 'documents' folder.  And another folder I created called 'OS media'.
    About my setup:
    I recently set up Time Machine with my Macbook Pro (running Mavericks).  TM is backing up the internal SSD along with an external hard drive that is always attached via USB.  The drive they are being backed up onto is a Western Digital My Book Live via wifi--which I know is not advised as it is not officially approved by Apple, but I'm hoping that's not the cause of this particular problem.  Because otherwise the MBL has been working pretty well.
    More details:
    Both of the problem folders happen to be from the external hard drive (not internal SSD), and in the first tier of folders.  But the other folders on that tier (about five other folders) are fully entact in TM, so I don't think it's an issue with the external HD.  And the missing files are not a certain file type, they are all the sub-folders and files under the problem folders.
    I went into the Western Digital (Time Machine) drive itself via Finder and verified that the files are indeed missing, so it wasn't a lag issue.  And I have nothing excluded from backups in TM preferences.
    I noticed that within those two problem folders, if any file was modified or created within that folder since my initial TM full backup (about two weeks ago), even if it was just a modified .ds_store file, TM would begin to include that file in the backup.  This make me guess the problem was something that happened during the initial TM backup.  The folders were somehow missed, and subsequent TM incremental backups aren't able to detect that it's missing.  So unless anyone has any other suggestions, I'm just going to try to redo a full backup.  I'm reluctant though, because it's going to take about two days to complete, and I really have no idea if it's even going to help.
    And I don't know if this is related, but when I'm in Time Machine and I do a search for any of my files, I always get zero results.
    Important sidenote:
    While browsing my folders in Time Machine (Star Wars view), I found that clicking on an alias to a folder would open up that folder, but it didn't show the contents of the folder as they were in that particular backup version; instead, it showed the contents of that folder as they appeared in my computer currently.  In other words, it appeared that I was looking at an old backup version of the folder, but it was actually the present time folder.  This could easily mislead someone into thinking that their current data is backed up, when it is not.

    oregonjoe wrote:
    Am I to understand people should not post questions that involve any 3rd party products that are not officially supported by Apple?
    No, but you must understand that Time Machine does not support the configuration you are using.
    The exhaustive list of devices supported by Time Machine amounts to the following:
    AirPort Time Capsule's built-in hard disk (any model)
    External USB hard disk drive connected to a Time Capsule (any model)
    External USB hard disk drive connected to an AirPort Extreme (current model only)
    A hard disk drive directly connected either to the source Mac, or a Mac on your local network.
    That is all.
    Use whatever backup device you want, but you should be aware that this site is full of reports of misery from hapless individuals who had been using third party NAS devices for Time Machine backups, only to find that they were incomplete, corrupted, or useless in the dire circumstances in which they were required. Apple won't care if you lose your data while using a Time Machine configuration specifically excluded from their technical support documents.

  • Time Machine no longer backing up files.

    so basically my question is... what do i do? is there a way to recover files? do i need to wipe out all data on my TC?
    this is the story....
    -TC was good for 2 months.
    ...Recently....
    -I tell TC to backup.
    -It takes FOREVER to "preparing backup..."
    -then a window pops up that says,
    "*Time Machine Error*
    The backup disk image could not be mounted"
    -When i go to Time Capsule in Finder, it doesnt say "My Backup's" anymore theres something that looks like it replaced that, which says "MyMacbook32r_2rf.Sparcebundle"
    -Also, when trying to access old files via Time Machine... nothing happens.
    -Another window just popped up that said,
    "The Storage Location for Time Machine Backups Can't be Found"
    Recent things that happened that could have caused this...
    i tried downloading a movie in my TC but it was way too slow downloading so i just cancelled.
    i downloaded another movie to my TC, Pineapple Express, and that worked.. but i couldnt seem to find it in the TC. i always had to open QT and go to recently played and use it from there. sketchy.
    I tried using that Disk Utility thing...
    2008-11-05 10:42:43 -0500: Disk Utility started.
    2008-11-05 10:46:15 -0500: Verify and Repair volume “Backup of Bradley Stewart’s MacBook”
    Starting repair tool: 2008-11-05 10:46:15 -0500
    2008-11-05 10:46:16 -0500: Checking Journaled HFS Plus volume.
    2008-11-05 10:46:16 -0500: Detected a case-sensitive catalog.
    2008-11-05 10:46:17 -0500: Checking Extents Overflow file.
    2008-11-05 10:46:17 -0500: Checking Catalog file.
    2008-11-05 11:50:11 -0500: Invalid sibling link
    2008-11-05 11:50:11 -0500: Volume check failed.
    2008-11-05 11:50:11 -0500: Error: Filesystem verify or repair failed.2008-11-05 11:50:11 -0500:
    2008-11-05 11:50:11 -0500: Disk Utility stopped repairing “Backup of Bradley Stewart’s MacBook” because the following error was encountered:
    Filesystem verify or repair failed.
    2008-11-05 11:50:11 -0500:
    2008-11-05 12:34:43 -0500: Verifying volume “Backup of Bradley Stewart’s MacBook”
    Starting verification tool: 2008-11-05 12:34:43 -0500
    2008-11-05 12:34:43 -0500: Checking Journaled HFS Plus volume.
    2008-11-05 12:34:43 -0500: Detected a case-sensitive catalog.
    2008-11-05 12:34:44 -0500: Checking Extents Overflow file.
    2008-11-05 12:34:44 -0500: Checking Catalog file.
    2008-11-05 12:56:47 -0500: Invalid sibling link
    2008-11-05 12:56:47 -0500: Volume check failed.
    2008-11-05 12:56:47 -0500: Error: Filesystem verify or repair failed.2008-11-05 12:56:47 -0500:
    2008-11-05 12:56:47 -0500: Disk Utility stopped verifying “Backup of Bradley Stewart’s MacBook” because the following error was encountered:
    Filesystem verify or repair failed.
    2008-11-05 12:56:47 -0500:

    These suggestions have worked for others...
    *_"The Backup Disk Image Could Not Be Mounted"_*
    First, it is important to distinguish this error message from another, similar Time Machine error that states “The backup volume could not be mounted”. This is important as the causes and cures for these two errors can be very different.
    Consider each topic below separately. When one option does not resolve your issue, then move on the next one.
    *Unmount the Backup Disk Image* (TC)
    If, for some reason, you have manually mounted the Time Machine backup disk image (sparsebundle), or Time Machine failed to eject it after the previous backup, subsequent backups may fail. (Console - “Failed to mount disk image”… “Backup failed with error: 21”)
    Eject the backup disk image (white drive icon) by either clicking the little Eject icon to the right of the disk image in the Finders’ Sidebar, or Ctrl-Click the drive icon on the desktop and select “Eject” from the contextual menu. Now try backing up again or launching Time Machine to view previous backups.
    *“Disconnect All Users…”:* #
    If your Time Machine backup drive (“Backup of Users Computer”) is mounted on your desktop or in the Sidebar of the Finder window. then Time Machine may think the drive is already in use. Alternatively, if the Time Capsule hard disk has been recently accessed by a Windows machine, it may not have fully relinquished control. Do the following:
    Open Airport Utility and select the Time Capsule on the left.
    Click “Manual Setup”.
    Select “Disks” at top of window.
    Click “Disconnect All Users…” at bottom of window.
    Close the Airport Utility.
    Now try Backing up again.
    One poster reported: “I got it resolved. Apparently it had to do with one of the files being open on the disk from the drive. I had browsed the disk with one of my windows boxes here and it must have left one of the folders "open". Anyway, I rebooted the TC and we are good to go now.”
    *Proper Computer Name* #
    Make sure your computer has a proper name. Go to System Preferences --> Sharing. Time Machine needs to differentiate your computer from others on your network (i.e. "Bills MacBook" or "Office iMac"). If the "Computer Name" field is blank, create a name. Realize that if this step is necessary, you will likely have to start the Time Machine backup process over again and do another full initial backup.
    According to this article, [http://support.apple.com/kb/TS1760], Time Machine may experience problems if your computer name includes certain characters. Make sure the computer name only includes ASCII characters from the following set.
    (0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ)
    Once a change in the computer name occurs, you should stop and restart Sharing on the affected computer. Uncheck and then recheck Sharing in the Services list on the left.
    Also, try removing the apostrophe from the disk images name (sparsebundle).
    Let us know if any of the suggestions above helped to resolve your issue.
    Cheers!

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