Time Machine and drive permissions question

I'm using Time Machine on a MacBook with two admin accounts (let's call them admin1 and admin2). admin2 is the account used daily. admin1 is the account used very infrequently.
Things were set up with admin1. I noticed today when I was logged in as admin2 that TimeMachine reported that the last backup was more than 2 week ago (when things were set up), and that the last backup failed because the user didn't have privileges.
I did a Get Info on the drive, and it seemed to confirm that (admin 1 had read/write privileges, but admin 2 had only read access).
To get around the problem I logged in as admin1 and turned Time Machine off. I then logged in admin 2 and selected the disk from there, and turned Time Machine on.
My question is - is this normal behavior? Or if there's something wrong, how to fix it?
Thanks...

Scott Newman wrote:
After a few minutes, an external drive that is mounted on the desktop will spin down--like it should. But...each time a "Save" or "Save As..." dialog box is opened in any application, things will grind to halt for a few seconds while the external drive spins up--even though I will not be saving files to that drive. I've always hated that, which is one reason I've always done manual backups.
Does that happen with Time Machine (either with a drive physically or wirelessly connected via Export Extreme) and is there any way to avoid that?
It happens with TM. I am not sure of any convenient work-arounds. You can of course eject the drive and reattach it when you want to make a backup, but that's a bit inconvenient, IMO.
Is it possible to manually turn on and turn off Time Machine (and the external drive) so as to only do manual backups like I'm doing now? I don't really care about looking up a prior version of file that I've changed. I just want a reasonably current whole-disk backup.
Yes, TM has an on/off switch. Just turn it off until you want a backup. It will simply continue where it left off. It will not create a completely new backup.

Similar Messages

Time Machine and Disk Permissions + Compatibility with Snow Leopard

I have received warning from Disk Utility that I should repair permissions as several files show incorrect permissions and, more than that, my 750GB shows "769GB available".
My questions are:
1. If I use Command+R and rebuild the disk from a Time Machine backup, will permissions be reset or will the files just be copied as they are now?
2. Is there a way to verify the TM backups to check the files therein?
3. Suppose, just for the sake of an exercise, that I reload Snow Leopard; can I still use SL's Time Machine to read a Lion Time Machine backup?
Thanks in advance for any advice you can provide!
Fernando

Why are you repairing permissions? It's a waste of time unless you have a specific reason to do it, and the warnings don't mean anything.
To verify your Time Machine backup, proceed as below.
Launch the Terminal 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 Terminal in the page that opens.
Drag or copy — do not type — the following line into the Terminal window, then press return:
sudo tmutil compare
You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up.
The command will take at least a few minutes to run. Eventually some lines of output will appear below what you entered.
Each line that begins with a plus sign (“+”) represents a file that has been added to the source volume since the last snapshot was taken. These files have not been backed up yet.
Each line that begins with an exclamation point (“!”) represents a file that has changed on the source volume. These files have been backed up, but not in their present state.
Each line that begins with a minus sign (“-“) represents a file that has been removed from the source volume.
Files that you’ve excluded from backup, or that are excluded automatically, are ignored.
At the end of the output, you’ll get some lines like the following:
Added:
Removed:
Changed:
These lines show the total amount of data added, removed, or changed on the source(s) since the last snapshot.

Time Machine And Repair Permissions Error

Hi.
I have a new Intel Mac running Leopard. "Set up Assistant" worked like a charm and brought over all my preferences, iTunes, iPhoto etc. with out a hitch. Verified permissions and the disk and came up clean.
I bought a USB LaCie 500GB external hard drive and connected it up with the idea that I would eventually use it for Time Machine.
First thing after connecting up the new hard drive, Time Machine came up and asked if I wanted it to use the new drive as a Time Machine drive and I clicked on "cancel." Thanks to all of you I knew enough to need to GUID partition and re-format the hard drive, from the FAT 32 that it came with to Mac OS Extended (journaled) that Time Machine needs. After completing this, again, the dialog box popped up about activating Time Machine and I cancelled it again.
I have not, yet, activated Time Machine. But running permission verify and repair yielded this error message both times: Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
This is the same message seen on so many other people's machines and posted here when they run into problems with Time Machine. If I don't resolve this error, will I, too, have problems running Time Machine?
This is so weird. The only thing I did between the clean permissions verification and the one with the error was connect the USB LaCie hard drive and partition and and re-format it. Time Machine has not yet been activated on this machine.
What does this SUID warning mean? Is this something I need to worry about? Should I wait to start using Time Machine?
Or... is this not a problem but there are other things I need to do to insure a good running of Time Machine?
Thanks so much for any advice you can offer.-Charlotte

The SUID is nothing to worry about.
It is documented from Apple stating this.
Everyone of us has that error.
It has not bothered Time Machine from doing its thing.

Time Machine and File Vault question

I just completed a clean install of OS x mavericks and then used my time machine back up to restore the mac.
The whole process was confusing for many reasons and I just want to get some clarification/verification on my next actions.
When I enter time machine preferences and click select disk. It gives me two choices. One in the group Back Up Disks and One in available disks. The confusing I have is that it is the same external hd. So which should I pick if I want to keep my original time machine backups?
The other question I have is, this whole journey started with me wanting to turn on file vault. I am using a late 2012 Mac Mini updated to Mavericks came with Mountain Lion.
Should I be able to use both an encrypted time machine (external hd) and file vault?
Thanks for the help.

The difference is that do yo want to combine the backus you made before with the previous backups (group Back Up Disks) or start a whole new backup (available disks). Either option will retain the previous backups unless you overtly delete them. I would select that later to start a new set of backups.
See the following for using FileaFault with Time Machine
http://apple.stackexchange.com/questions/46833/with-file-vault-on-are-time-machi ne-backups-encrypted
http://kb.mit.edu/confluence/display/istcontrib/Enable+FileVault+(whole+disk+enc ryption)+on+Time+Machine+backup+drives+on+OS+X+10.9

Stolen Time Machine Backup drive - security questions

Hi,
I had my Time Machine Backup drive stolen out of my bag at the airport. My question is, is there any security on the drive? i know its not encrypted, but i'm wondering if someone can plug the drive into another computer and have full access to all of my files w/o any need for password etc?
thanks,
-g

Yes is the short answer.
If you were using File Vault, I think your backups would be encrypted too, but I don't use File Vault so I don't know for certain.
What I do is create a small encrypted disk image and store all of my sensitive information such as passwords, etc. on it. Your keychain on MacOS X is similarly encrypted, so those passwords are automatically safe. But any documents you had or e-mail messages, or address book info is all available.

Time Machine & Hard Drive Spinup Question

For years I've used a manual, whole-disk backup--usually once a week. I backup all personal files daily. I've used Dantz Retrospect, Synchronize X Pro and now I use MimMac. All have functioned well.
I'm considering switching to Time Machine for my backups; however, I was wondering if the following would occur should I use Time Machine with a physically or wirelessly connected USB or Firewire drive:
After a few minutes, an external drive that is mounted on the desktop will spin down--like it should. But...each time a "Save" or "Save As..." dialog box is opened in any application, things will grind to halt for a few seconds while the external drive spins up--even though I will not be saving files to that drive. I've always hated that, which is one reason I've always done manual backups.
Does that happen with Time Machine (either with a drive physically or wirelessly connected via Export Extreme) and is there any way to avoid that? I know that the external drive will spinup each hour when Time Machine does its backups, but it's all the other spinups that I want avoid.
Is it possible to manually turn on and turn off Time Machine (and the external drive) so as to only do manual backups like I'm doing now? I don't really care about looking up a prior version of file that I've changed. I just want a reasonably current whole-disk backup.

Scott Newman wrote:
After a few minutes, an external drive that is mounted on the desktop will spin down--like it should. But...each time a "Save" or "Save As..." dialog box is opened in any application, things will grind to halt for a few seconds while the external drive spins up--even though I will not be saving files to that drive. I've always hated that, which is one reason I've always done manual backups.
Does that happen with Time Machine (either with a drive physically or wirelessly connected via Export Extreme) and is there any way to avoid that?
It happens with TM. I am not sure of any convenient work-arounds. You can of course eject the drive and reattach it when you want to make a backup, but that's a bit inconvenient, IMO.
Is it possible to manually turn on and turn off Time Machine (and the external drive) so as to only do manual backups like I'm doing now? I don't really care about looking up a prior version of file that I've changed. I just want a reasonably current whole-disk backup.
Yes, TM has an on/off switch. Just turn it off until you want a backup. It will simply continue where it left off. It will not create a completely new backup.

Need advice on new hard drive for Time Machine, and have Firewire questions

I have an Intel iMac 2.66GHz with 500GB internal drive. I am going to buy an OWC 1TB drive to use for Time Machine.
I also have an older 160GB external drive with Firewire 400. I'd like to continue using it for extra storage, and would like both the iMac's internal drive and the 160GB external drive to be backed up to the new drive.
OWC's 1TB drive is available with Firewire 400 & USB 2. For an additional $30, it will also have Firewire 800. If I get the Firewire 800 drive and daisy-chain the iMac > new 1TB drive > old 160GB drive, will the iMac to 1TB drive run at 800, or will the 160GB drive's limitation of Firewire 400 pull the speed of the whole connection down to 400? (If the latter is true, then it would be a waste of money to get Firewire 800.)
Also, will it make much difference whether I use Firewire 800 or 400 for a drive dedicated to Time Machine?
Finally, the 1TB drive with a 32MB cache costs $20 more than one with a 16MB cache. Is a 32MB cache worth the extra expense for using with Time Machine?
Thanks!
Message was edited by: Patrick Houlihan

Patrick Houlihan wrote:
If I get the Firewire 800 drive and daisy-chain the iMac > new 1TB drive > old 160GB drive, will the iMac to 1TB drive run at 800, or will the 160GB drive's limitation of Firewire 400 pull the speed of the whole connection down to 400? (If the latter is true, then it would be a waste of money to get Firewire 800.)
I believe it will operate the entire bus at the slowest speed, but can't say for sure.
Finally, the 1TB drive with a 32MB cache costs $20 more than one with a 16MB cache. Is a 32MB cache worth the extra expense for using with Time Machine?
I went with the cheaper, smaller cache OWC drives for my backups on the theory that if caches speed repeated access of the same data, and a backup is always a single-pass stream of non-repeating data, then with a backup the data that goes in the cache doesn't need to be fetched again and therefore the cache isn't much help for backups. I'd love to hear if that's true.
I didn't answer the one about FireWire 800 for Time Machine because my Time Machine backups are over the network to Time Capsule. However, having a faster Time Machine drive interface should be faster. FireWire 800 certainly speeds things up for non-Time Machine backup software like SuperDuper which I also use.

Time Machine and File Permissions

'Twere I to rate this question's technicality on a scale of 1 through 10, it would rate 8. Just warning you. Unix people will be especially useful for this.
Okay, so, before the problems started, my hard drive had three partitions. One for OS X, one for file storage for Ubuntu Linux, and one called the "Swap" partition, which somehow relates to Ubuntu (the Ubuntu installer put it there, I've no idea what it's for). Here's a makeshift diagram of what my partition map used to be:
I ran out of space in my OS X partition. You see, I've recently had the fortune to obtain some rather fantastic software. The downside is that the software (and it's files) take up roughly 53GB. I won't trouble with you what it actually is (though it should have dawned on some people by now). Between OS X and Ubuntu Linux, OS X prevailed. As far as I'm concerned, Linux will have to wait 'till I have a larger hard drive.
So, I fired up Disk Utility, and tried to remove the two Linux partitions. It told me it was "Preparing to erase [insert Linux partition name]". It told me that for an hour. After one hour, I said screw it, I'll do this the "hard" way.
My initial plan was to back up my data, and completely reformat my drive, reinstall Leopard, and have it restore from my Time Machine backup. Now, my external drive is not big enough to hold a complete system-wide backup. I had to leave some stuff out. Here's the list of exclusions, taken directly from the back up logs:
Excluding System files: 16.3 GB (242143 items)
Excluding /Developer: 0 bytes (1 items)
Excluding /Users/Audacitor/Downloads: 7.9 GB (18 items)
Excluding /Applications/Creative Suite 3: 3.2 GB (13214 items)
Excluding /Applications/Disk Images/Macromedia: 240.5 MB (4 items)
Excluding /Applications/Utilities: 484.2 MB (111 items)
Excluding /Users/Audacitor/.Trash: 97.3 MB (2142 items)
Excluding /System: 108.2 MB (5874 items)
Excluding /Users/Audacitor/Library/Calendars/Calendar Cache: 144 KB (1 items)
Excluding /Users/Audacitor/Library/Safari/WebpageIcons.db: 52 KB (1 items)
Excluding /Users/Audacitor/Library/Mail/Envelope Index: 680 KB (1 items)
Excluding /Users/Audacitor/Library/Icons/WebpageIcons.db: 20 KB (1 items)
I am uncertain as to why it excluded those last four entries. I didn't ask them to be excluded, so I assumed that was something Time Machine does automatically.
The backup worked normally, or so it seemed. After about a half hour, it told me it was done. I hastily (read; stupidly) unplugged the drive and prepared to reformat my drive. So excited was I to reach my new software, that I made the utter and completely foolish move of not double checking that everything I needed was backed up. If I had, I might never have this problem, and even if this problem were destined to happen, I could have at least saved my Pictures folder (fortunately, most of it's contents are safely residing on my iPod).
So, I wiped my drive. Specifically, I booted into my Leopard Install DVD, and went for the Erase and Install option. The install commenced and finished without a hitch. I brought my "new" computer up, enjoyed the theatrics of the intro movie and started running through the setup. I came to the step where it asks if I want to transfer files from another Mac, from another volume on my Mac, from a Time Machine backup, or not at all. I of course clicked for a Time Machine back up. The first sign of trouble was that my backup didn't show up (despite having my external plugged in). I felt a pang of fear, but it didn't worry me too much, and I thought to myself that I'd just use Migration Assistant later on (the Leopard setup sequence specifically stated I could do this if I so wished).
So I went straight to my desktop and fired up Migration Assistant, and went through the steps till it asked me to select a Time Machine backup. But there were none to select from. I waited a full minute, my fear growing steadily to terror. Finally, I realized that my data was gone, and flipped out. My inner geek, which was screaming at me to calm down and look inside my external, was shackled and thrown into a tiny corner of my now completely panicked mind. This lasted for roughly two minutes. After regaining myself, and opened my external. It contained one folder named Backups.backupdb. I opened it, and inside I found Neomiranda (Neomiranda is the name I gave my computer). So far so good. Inside the folder of Neomiranda, I found 2008-02-20-060526.inProgress. Another 30 seconds of flipping out over the idea of .inProgress. After awhile, I had the sense to right click on it, and hit the "Show Package Contents" option.
Inside were three folders, with three corresponding log files. I quickly realized that each one was a backup. The first two were empty, which I anticipated. Those were my two attempts while figuring out what to exclude, so I could get a backup to fit on my external. The third contained another Neomiranda folder, which contained all my data. Everything except my Pictures folder was there.
So, I went back and forth, manually restoring my data. When I'd finished, I started up a few apps to check that everything worked. Not everything worked. Mail wouldn't even get a bounce from the dock, Firefox told me there was a copy of itself already running, and iTunes complained that I had either a locked disk or insufficient permissions. Acting on iTunes' advice, I set out comparing the permissions of various folders I'd copied to the permissions of their equivalents on another, fully functional, system. Everything checked out. Nothing was locked, and everything had the correct permissions. I fired up Disk Utility and had it a run a permissions repair. It spat out a great deal of stuff that it apparently found wrong, and apparently fixed, but ultimately, it had no effect.
I cannot find anything wrong with any permissions, but I've got a feeling that's where the problem is. Why? Because any time I want to do anything to a folder I've copied, or anything inside a folder I've copied, it wants my admin password. Despite no apparent differences in permissions between folders I don't need a password for and between folders I do need a password for, I need a password for folders I have copied from my backup.
I've not looked into file ownership, as I couldn't find a way to even find out who a file belongs to, much less actually change ownership to anything. If I end having to use chown at a bash, fine with me, but I'm not a Unix man. I'll still need help with it (though I do know how to use the man command).

Same problem and for months now. I haven't been able to find a solution, but I suspect that's because I don't know exactly what's wrong.

Has anyone restored from Time Machine and Application permissions okay?

Greetings Apple Discussions:
Has anyone restored their system from Time Machine yet and had a successful restore of their application permissions from Time Machine?
I just wanted to get confirmation.

I've done several. In fact I did many during beta testing and I've done at least one after installing 10.5 and 10.5.1. Each one done under 10.5 and 10.5.1 were successful without any noticeable issues with permissions.

Time Machine and Drive connected to Airport Extreme?

Hi All,
Any one knows if there i a way to have a drive connected to the USB port of an Airport Extreme mount on its own once I'm logged in ? a script of something to that effect.
TIA
Oscar A.

Thanks for the reply... but I don't think that is happening with mine... but I'll be keeping an eye on it. .. it sounds like we have the same set up... USB drive connected to the Airport Extreme.. If that's the case. .. that'll be cool.... but one question.. do you have to be logged in. or does it do it even if not logged in?
Thanks again...
Oscar A.
Message was edited by: OzZkar65

Hallo ,why is it that when I delete a photo ,which is backed up by time machine and western digital external hard drive , that I am able to restore the photo okay but not the titles and descriptions . I have a Macbook 4.1, mac osx 10.5.8 . Iphoto 7.1.5 ,

QUESTION.
Hallo , my question is ;whenever I delete a photo and restore it through Time machine and Western digital external hard drive , I am able to restore the photo but not the titles and descriptions . Western Digital inform me that it isn't their external hard drive problem and suggest that it is an Apple software problem ?
I am using a Macbook 4.1 , with Mac OSX 10.5.8 . I photo 7.1.5 , last modifie4d 01/05/2010 -universal . Should I be upgrading Iphoto ?
I hope that someone is able to help in this matter , as i have to restore 12000 photos !
Thanking you in anticipation.
Alan from Wigton

Hallo Kieth ,
I am not quite ready to restore the full iphoto library , as I have days of work re - imputting titles,descriptions and enhancement . I hope that your suggestion works , as I use my Macbook basically to work with digital photography. Through time , I will need to delete my library to recover more disc space and I would hate to have to spend more time re - imputting titles and descriptions all over again .
Thanks for your interest and advice.
regards - Alan

I built a website, using iWeb. I backed up daily with Time Machine and OS 10.6. My HD crashed. I replaced the HD and installed 10.5. But now I can't restore iWeb and my domain file. How do I restore my site files on the new drive?

I obviously dont know how to use this forum...my question to the community seems to be the truncated phrase in the title block above..you can scroll thru it to see my whole question....basiclly,.my question is: How do I restore my iWeb domain files which are kept in user>library>applicationssupport>iWeb>domain in my Time Machine date listings...to a newly installed disc. I had a disk crash, removed the failed drive and installed another. I then installed OS 10.5 (I didn't have a copy of my 10.6). Now I'm having difficulty figuring out how to get the iWeb files from the Time Machine external drive used with the 10.6 to the new drive running 10.5...any help muich appreciated....!!
bob in St. Peters Nova Scotia...

Go to to your Users/Home/Library/Application Support/iWeb folder in the Finder and then enter Time Machine. Go back to the last backup that has the domain file, select it and use the Restore button.
OT

Issues with Time Machine File Restore Permissions and Interface

Hi All,I bought a Time Capsule in January 2010, and i've had backups since then.
Time Machine's interface has pretty much always been laggy as ****, but I've always put that down to using it over wifi, perhaps that was a wrong assumption.
Anyway, I went to open a folder in a virtual machine which resides in my mac's documents folder, and it wasn't there. Sure enough this folder wasn't in my documents folder, so I thought i'd restore it from time machine. Time machine shows every segment as a pink fully coloured one (signalling theres a backup there) for a few secs, before most of them turn into a pale pink. Looking into the issue further, it seems as though I don't have permission to access the documents folder on a lot of backups, by looking at the users/brett/ folders on them (which i do have access to), right clicking on the restricted folder shows that everyone has no access, and it's fetching the other user. Trying to add myself to it doesn't work.
I have gone through two MBPs with the same backup set, and a number of hard drives (the latest being a SSD I put in yesterday, and the migration assistant restore from time machine worked without skipping a beat - never had a problem doing full restores or migrations, just using the interface)
Obviously the easiest thing to do would be to start afresh, but I'd rather not as I'd lose 2 years worth of backups, and who's to say this wouldn't just happen again in the future? Could this be why the interface is so slow too?
Thanks guys

studentguy wrote:
Time Machine's interface has pretty much always been laggy as ****, but I've always put that down to using it over wifi, perhaps that was a wrong assumption.
Yes, there is a lot going on to "populate" the display -- it can be sluggish even to a FireWire 800 drive.
Looking into the issue further, it seems as though I don't have permission to access the documents folder on a lot of backups, by looking at the users/brett/ folders on them (which i do have access to), right clicking on the restricted folder shows that everyone has no access, and it's fetching the other user. Trying to add myself to it doesn't work.
I don't do Windoze, so am not familiar with the structure of the VM files, or how the permissions on them work. Many folks exclude them from Time Machine, and back them up separately.
I have gone through two MBPs with the same backup set, and a number of hard drives (the latest being a SSD I put in yesterday, and the migration assistant restore from time machine worked without skipping a beat
Yes, because it simply copies whatever permissions are there. It doesn't need to (and shouldn't) check whether the logged-on user has permission to anything.
Could this be why the interface is so slow too?
It could be a contributor.
Can you set the permissions on the VM files on your Mac so everyone has read rights? That should at least allow you to restore their backups.

External drive for Time Machine and Firewire Hub

Just got a new iMac. My old iMac G5 was running 10.4.11 so no Time Machine. On the new iMac I am running 10.5.6 I find I have questions about how to go about making best use of this new facility available to me. Since my new iMac has only one firewire port (FW 800) I also need an additional port here.
My thoughts are to use an external drive connected with FW 800 as a Time Machine backup and use the (usually) extra FW 800 port to extend the FW 800 and I find I can get a dual interface drive with both FW 800 and FW 400, so I could use the FW 400 for FW 400 devices like other FW 400 drives and my video camera.
Currently I use SuperDuper to make clone backups of my HD on a weekly basis (I use 2 drives for this on a rotating basis). I plan to continue that in addition to the facility offered by Time Machine (on a separate drive).
My questions are...
Is it a good idea to use the extra FW 800 or 400 port on an external to connect other drives to use for clone BUs?
If that is a good idea...
What brand and size of drive to use for the Time Machine BU (FW 400/800 sharing)
A. Maxtor?
(I have several OneTouch II and OneTouch III that I use for clones, I have been using them for a few years without problem. I seem to remember reading about some problems with Maxtor, have I just been lucky?)
B. Newertech MiniStack v3 from OWC MacSales?
C. OWC Mercury Elite-AL Pro™?
If the OWC Mercury Eltite is a good choice...
Is a 750 GB large enough?
Is it worth it to get the 1TB Enterprise 7200RPM?
Any other suggestions?
Andy

i needed 3 drives in total so went with my 2nd choice of buying external enclosures and then hard drives,
at the end it cost me much much less so i endded up buy another as a spare,
so currently using 4 NexStart combo enclosure each one fitted with a 500gb hard drive,
i got one connected to my G5 and 3 connected by FW400 to my imac through a daisy chain,
for time machines it doesnt matter about speed so you dont need to use up the FW800 Port,
FW400 will be fine,
before this i had a USB2 WD Book and was using that with time machine and never had a problem through USB,
i always connect to a port i hardly use as i wont ever need to keep taking it off if i had to connect my camera to it for example....

HT203177 I had to get a new hard drive in my 27 in IMac. I used time machine to get everything back on my computer. I just turn on time machine and its says it's preparing over 800,000 items to back-up, it never back-up, it stop and starts the process ove

I had to get a new hard drive in my 27 in IMac. I used time machine to get everything back on my computer. I just turn on time machine and its says it's preparing over 800,000 items to back-up, it never back-up, it stop and starts the process over again.

Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then repair the backup/TM drive.

Time Machine and drive permissions question

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