12 Replies Latest reply: Feb 29, 2012 8:12 AM by Pondini
Thomas Schaller Level 1 Level 1 (105 points)

All of a sudden my Time Machine backups don't work anymore. After a bit of "Making backup disks available..." I get the error message:

Backup disk image "...." could not be accessed (error -1).

 

I use a Time Capsule as a backup. I have reset it - I have deleted my sparsebundle file. I have changed the names of the capsule and Time machine to something less than 27 characters.

Sometimes when I hit Enter Time Machine the system will work long until it astates: The backup disk is available. Do you still want to acvcess it. When hitting Yes, then sometimes I see my old backups and then the backup might work. But only that time. After that the same error messages as above comes again.

 

Any ideas?

I am running 10.6.8

Thanks!


Mac mini (Mid 2010), Mac OS X (10.6.8)
  • 1. Re: Backup disk image could not be accessed (error -1)
    Thomas Schaller Level 1 Level 1 (105 points)

    additional info after installing Time Machine Buddy - from that log:

    (it seems to me some sort of network error - my sparsebundle file sits on Toms Time Capsule (not Toms Time Capsule-1)

     

     

     

    Starting standard backup

    Network destination already mounted at: /Volumes/Toms Time Capsule-1

    QUICKCHECK ONLY; FILESYSTEM CLEAN

    Failed to mount disk image /Volumes/Toms Time Capsule-1/Intel Mac mini.sparsebundle (DIHLDiskImageAttach returned: 109)

    Mount failed... waiting 60 seconds and trying again.

    Ejected Time Machine network volume.

    Attempting to mount network destination using URL: afp://Thomas%20Schaller@Toms%20Time%20Capsule._afpovertcp._tcp.local/Toms%20Tim e%20Capsule

    Mounted network destination using URL: afp://Thomas%20Schaller@Toms%20Time%20Capsule._afpovertcp._tcp.local/Toms%20Tim e%20Capsule

    QUICKCHECK ONLY; FILESYSTEM CLEAN

    Mount failed... waiting 60 seconds and trying again.

    Failed to eject volume /Volumes/Toms Time Capsule-1 (FSVolumeRefNum: -107; status: -47; dissenting pid: 0)

    Network destination already mounted at: /Volumes/Toms Time Capsule-1

    QUICKCHECK ONLY; FILESYSTEM CLEAN

    Giving up after 3 retries.

    Backup failed with error: 21

  • 2. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)
  • 3. Re: Backup disk image could not be accessed (error -1)
    Thomas Schaller Level 1 Level 1 (105 points)

    I looked at your site for quite some time today. I  think I tried everything recommended under C17 - still no Go. Will try again.

    But why is it trying to mount Toms Time Capsule-1 and failing - couldn't that be the issue?

    Shouldn't it mopunt Toms Tims Capsule (with out the dash 1)?

    Thanks

  • 4. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)

    Thomas Schaller wrote:

    . . .

    But why is it trying to mount Toms Time Capsule-1 and failing - couldn't that be the issue?

    No, that's not a problem.  It will show the -1 until it's actually mounted, then the -1 will disappear.

     

    I doubt it will help, but you might try resetting the TC per http://support.apple.com/kb/ht3728

  • 5. Re: Backup disk image could not be accessed (error -1)
    Thomas Schaller Level 1 Level 1 (105 points)

    So I rbought my Time Capsule into the Apple store - sure enough, it mounted for the guy there and started to back up.

    Took it back home.

    Still no go with my MacMini - then I went to my daughter's iMac and started using Time Machine on hers with my Time Capsule (wireless) and sure enough, that started the backup as well.

     

    What gives?

     

    I also tried from my computer via Ethernet and wireless - both no go.

    I deleted everything from the Time Capsule.

    I trashed the preferences in Hard Drive-Library.

     

    I sounds like it is a software issue, doesn't it? How shall I proceed?

    Thanks

  • 6. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)

    It's a long shot, but perhaps your installation of OSX is damaged.

     

    You might want to install the "combo" update, per Installing the ''combo'' update and/or Reinstalling OSX.

     

    If that doesn't do it, you could install a fresh version of OSX (that won't disturb anything else), per the same article.

  • 7. Re: Backup disk image could not be accessed (error -1)
    Thomas Schaller Level 1 Level 1 (105 points)

    Didn't have time yet to reinstall OSX.

    But another thing I've noticed is that the Time Capsule is now spinning up every 2 minutes and immediately spinning down again (after 5 seconds).

    Currently one iMac is working with Time Machine wirelessly and my MacMini is connected via Ethernet, but Time Machine is not set up as it doesn't work.

    Could that spinning up and down help explain my problem with the Mac Mini or is that something normal in the Time Capsule's operation.

    I remember clearly when only my Mini was connected via Ethernet and the backups were working that the Time Capsule only spun up when the hourly backup was due - now it spins every 2 minutes.....

     

    Thanks

  • 8. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)

    It really sounds like the sparse bundle disk image containing those backups is corrupted.

     

    Earlier you said, "So I brought my Time Capsule into the Apple store - sure enough, it mounted for the guy there and started to back up." 

     

    I didn't notice at the time, but you didn't say whether you also took your Mac.  If the TC mounted when connected to a different Mac, that would mean the TC itself is probably ok, and Time Machine on that computer was able to create a new sparse bundle for that Mac and start backing-up to it.  It would have ignored the sparse bundle for your Mac.

     

    One of the things in #C17 is to repair the backups.  Are you sure you did that, and that it said the backups "appear to be ok"?  If not, try that one again.

     

    The repeated spinning-up may be the Mac trying to mount the sparse bundle.  Does this happen while Time Machine is OFF?

  • 9. Re: Backup disk image could not be accessed (error -1)
    Thomas Schaller Level 1 Level 1 (105 points)

    I did not bring my Mac.

    There is also no sparse bundle image from my machine on the TC - I erased it - I did everything, starting from scrtach - anything I could think of.

    Currently Time Machine on my machine is off, no sparse bundle on the TC - flying without a backup net at the moment.

    The spinning up and down happens even though my Time Machine is off - Time machine from another computer is on and working fine (and that one has its sparse bundle on it of course)

    But the spinning happens even when no backup process is going on for that machine (every 2 minutes). Could that be a normal process when wireless clients are set up?

     

    Weird.

    And thanks for you trying to help!!!!

  • 10. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)

    Thomas Schaller wrote:

    . . . flying without a backup net at the moment.

    Eek!  That's scary!   Keeping "secondary" backups is always prudent, especially if your primaries are on a network, and even more so if there's the slightest problem.   See Time Machine - Frequently Asked Question for some suggestions.

     

    But the spinning happens even when no backup process is going on for that machine (every 2 minutes). Could that be a normal process when wireless clients are set up?

    Possibly, if the sparse bundle for that Mac is mounted, or the other Mac is trying to do something with the TC's disk.  Power the other Mac down (or take it out of range) and see what happens.

     

    If it continues, then something on your Mac is trying to access it.  Power it down or take it out of range and see if it stops.

  • 11. Re: Backup disk image could not be accessed (error -1)
    P. Zazz. Level 1 Level 1 (0 points)

    Hi Thomas,

     

    I have this same **** issue. It used to work fine. But when I moved house, I changed my modem and internet provider, and also updated to OS10.7. I had to start my back up again and lose the old back ups.

    Currently, when I reset things and delete the "sparsebundle" back up file, then set off the back up, it'll do the long initial back up fine, then I'll restart the computer the next day and this same error appears "Time Machine could not complete the backup. The backup disk image “/Volumes/[MY TIME MACHINE NAME]/[MY MAC NAME].sparsebundle” could not be accessed (error -1)."

    During the attempt of the back up, in the Time Machine system preferences the progress bar says "Looking for

    back up disk...", even thought I can see the TC mounted on my desktop.

    I am also trying, with difficulty, to set it up via ethernet rather than wifi, to speed it up. For the non-geek, this is not an easy task. Not sure if this is adding to the issue.

     

    My TC hard drive is spinning every few minutes too, like yours is.

     

    There was an Airport software and firmware update, which I did early on, so these are up to date now. So not sure if it's an added problem.

     

    The green light is on. But with the new Airport software this is elusive. If there is a problem with the TC and it shows an orange light, the new software displays this too, but gives you information about it (internet connection, DNS servers, etc). If you go and set options to ignore these it turns the light green. It shows a green light that means the TC is correctly doing what you have set,... but this may not be the right settings for it to actually work... IF YOU GET ME?! Hence the green light may not actually mean it's running properly.

     

    I have a second TC which I do NOT use for TM back ups, it is connected via Wifi, not probs there.

     

    In addition to all this... the way Time Machine does it's thing is different to how it used to be. Not sure if this changed with the new OS and is normal, or if it is actually the problem...

    Now, when a back up is attempted, a new volume appears on my desktop called "Time Machine Backups". As the back up starts, for some reason a finder window of this volume opens up. The volume has a white external drive icon, but is secondary to the blue wifi drive icon of the TC, and in this volume is a folder called "Backups.backupdb", and in this are dated backups within their original folder structure (ie not the sparsebundle thing as seen on the TC volume). This new volume's size is 2.84TB, how is this possible? My internal drive space is 2TB total, and the TC is 1TB!

     

    So my questions to the Time Machine society are:

    * Is this new volume normal? Is this something related to the problem?

    * I have Wifi turned off in the Airport settings as an attempt to connect it via ethernet (only). I've noticed the TC icon has the Wifi symbol on it, even though I think it's only connected via ethernet. Could this set up I am trying be confusing the TM software? And if so, how do I set this up properly, coz I'm just guessing.

     

    Please note: I've only come accross this forum and not tried anything people have suggested, just sharing the love. Thomas... you are not alone!

     

    My next attempt as a test might be to revert to the proper Wifi set up and go through the 12 day initial back up process.

     

    Fkn grrrrr.

  • 12. Re: Backup disk image could not be accessed (error -1)
    Pondini Level 8 Level 8 (38,720 points)

    P. Zazz. wrote:

     

    Hi Thomas,

    . . .

    then I'll restart the computer the next day and this same error appears "Time Machine could not complete the backup. The backup disk image “/Volumes/[MY TIME MACHINE NAME]/[MY MAC NAME].sparsebundle” could not be accessed (error -1)."

    See #C17 in Time Machine - Troubleshooting.

     

    If you have an iMac, and haven't installed the Wi-Fi Update v1.0, do so.   If your Mac is losing contact after sleep, that will most likely fix it.

     

     

     

    Now, when a back up is attempted, a new volume appears on my desktop called "Time Machine Backups".

    That's not new; that's the .dmg (disk image) inside the sparse bundle, and network TM backups have always worked that way.  But you may not have seen it before, if you didn't have your Finder preferences set to show it on your desktop and/or Finder sidebar.  It's mounted automatically by Time Machine during a backup, then dismounted.

     

    As the back up starts, for some reason a finder window of this volume opens up.

    That's not normal, however.  Mounting a disk image shouldn't open a Finder window.  I don't recall seeing that posted anywhere, so don't know what might be causing it.

     

    This new volume's size is 2.84TB, how is this possible?

    That may actually be the maximum size, which should be the size of the volume it's on.  If it seems to be the actual size, it may be corrupted; if so, you may want to repair it, per #A5 in Time Machine - Troubleshooting.

     

    I have Wifi turned off in the Airport settings as an attempt to connect it via ethernet (only). I've noticed the TC icon has the Wifi symbol on it, even though I think it's only connected via ethernet.

    It's the same -- there is no Ethernet symbol.  Here's a partitiion on a USB drive connected to my Airport Extreme.  It's the same whether connected via Ethernet or WIFI:

     

    Screen Shot 2012-02-29 at 11.06.53AM.png

     

    My next attempt as a test might be to revert to the proper Wifi set up and go through the 12 day initial back up process.

    There's no reason to do that; Apple recommends doing the first backup via Ethernet if at all possible.

     

    You might want to review the Time Machine Tutorial, and perhaps browse Time Machine - Frequently Asked Questions and/or Using Time Machine with a Time Capsule.