Time machine question - multiple accounts

Hello,
I searched the recent posts but could not find anything specific to my problem so apologies if it has been covered or is obvious.
I have a MacBook which has two user accounts on it, I plugged in an external USB drive to act as the Time Machine backup disk. Whilst Time Machine seems to have created a backup successfully I am unconvinced that the whole computer (therefore both accounts` data) has been backed up to the Time Machine backup disk. When I enter the Time Machine gui the other files are not visible, is there a permissioning issue ? From memory, I think that the initial backup was done when the secondary user was logged in.
If it would help, I am happy to consolidate the two accounts together but I would have thought that Time Capsule could handle multiple users.
Has anyone come across this or have any idea of how to resolve this ?
Many thanks in advance

You can't easily combine user accounts, especially if both have data for the same app. See [Transferring files from one User Account to another|http://web.me.com/pondini/AppleTips/Transfer.html].
That won't confuse Time Machine. Any data you copy to a different user's home folder will be backed-up from the new home folder. The new user won't be able to see the previous backups of that data, of course, just new ones. So you can delete the originals from the old home folder, but don't delete the old user account until you're sure you don't need anything from the old backups.
Eventually, of course, Time Machine will delete all the old backups.

Similar Messages

Where to Post Time Machine Question?

My question title says it all. How do I find the area in which to post a Time Machine question? Or do I just do it here? Thanks.

There is no place to post a question on Time Machine

Time Machine questions: Handling backups for multiple Macs to one FW drive

I am reviewing the Time Machine thread and seeing a lot of helpful information, but I would like to ask something I haven't quite found yet.
We have 2 Leopard Macs, a MacBook Pro and an intel iMac... with plans to upgrade another MBP from Tiger to Leopard at some point.
In planning for Time Machine, we set up a 1 TB drive, attached it via FW 800 to the iMac, partitioned it GUID for Intel, and made 3 partitions, one for each planned Mac we want to back up to it.
I started Time Machine on the iMac first and the first backup of about 100 gb took maybe 4 hours.
Then we tried to start the Time Machine backup for the MBP over the network (wireless). It was understandably much slower and quit with some error last evening, so I took advantage of the pause to move the notebook to a wired ethernet connection. It got even slower so this morning I directly connected it FW 800, erased what had been backed up, and started over. So far, so good. 6GB out of 100 in 10 minutes or so. The idea being, if we can get the first backup completed faster over wired connection, maybe doing the incrementals over wireless network will be okay. Sounds like some folks are doing that successfully. I am hoping that works out.
Questions: Was it necessary to partition my 1TB drive into a partition for each Mac's Time Machine backup? I did make each partition bigger than the hard drive it is designated for.
To get the MBP to mount the external FW drive on its desktop, I had to disconnect the drive from the iMac. Is there any way I can connect the FW drive to both the MBP and the iMac (the drive has two FW 800 out connections, so it is physically possible)? I'm thinking (from reading posts of others with notebooks) that one strategy is to connect your notebook to your Time Machine drive at night and let it back up, but it'd be great if I could leave the iMac connected while doing so. Is there a way the volumes on the drive can mount on both desktops?
When I try wireless again, I'm seeing mixed posts regarding whether the MBP will need a password to log in to the remote volume each time, or only the first time when the Time Machine backup is established... if I could get clarification on that, it would be helpful.
Thanks!
thanks

What do you see on your notebook when you click on your TimeMachine icon in the Dock?
My notebook is mounting the backup drive on an hourly basis, running a backup, and looking like it is doing something... but when I then look at TimeMachine, I can't see the backups. (On my iMac with the drive directly attached, I see a progression of windows showing all the hourly backups the last 24 hours, etc.) I just called Apple to ask why this is so, and they told me they couldn't help me because wireless Time Machine backups aren't supported.
I know backups to a hard drive attached to an Airport Express Base Station are not supported. But when they say "You can designate just about any HFS+ formatted FireWire or USB drive connected to a Mac as a Time Machine backup drive. +Time Machine can also back up to another Mac running Leopard with Personal File Sharing, Leopard Server, or Xsan storage devices+"... well, how can you DO that?

Time Machine question.

Hello. Im not sure exactly where to post this, i couldnt find a Time Machine section. Ill make this as short as possible.
I have a 2011 mac mini with snow leopard 10.6.8 and my wife just bought quick books accounting software which requires 10.8 mountain lion, so i just bought it, although i havent installed it yet and here is why. I started another thread the other day about weather or not i HAD to update to Yosemite, all the reviews are making me nervous so im opting for Mountain Lion. So, in my thread a member asked me how i back up my mac mini, well i dont and never have. But i recently got a 1TB external hard drive which im going to return for a 2TB. This member was talking to me about mountain lion and suggested that i install it on my external hard drive so that i could keep my nicely working Snow Leopard as well as having Mountain Lion for my wifes quick book program. As we spoke, the member said he wasnt sure id be able to back up my mac mini with Time Machine onto the 1TB as well as install Mountain Lion onto it and i also plan on putting a few thousand pictures on it. Can someone tell me if this is possible? I know ZERO about time machine and backing up for that matter. Ive never done it. So another question, if i was to back up using Time Machine and a 2TB external hard drive, would that also back up all my photos in iphoto, my photoshop program and Toast editing? Would all of that be backed up? Am i making any sense? LOL.
Thanks.

zowenso wrote:
So, are you saying that I should have a totally different external hard drive to use for time machine back ups?
Would it be safe to store all my pictures and the installation Mountain lion back up on one external hard drive or am I going to have to get a separate one for each?
Also, what if I just did the standard update to mountain lion and didn't save it to an external hard drive? Could I then use one external hard drive for my pictures and the time machine back ups?
Yes. Use a different drive for your Time Machine back ups.
You could use a 2TB external USB drive, partition it into 2-1TB partitions, install OS X Mountain Lion on one and point your Time Machine back ups to the 2nd 1TB partition. I think you should be able to use this 1TB partition for both your Snow Leopard and Mountain Lion Time Machine back ups. Just point each to that 1TB partition. All of your data (photos, music, documents, Quickbooks data, etc.) would be backed up by Time Machine as it backs up the entire drive (OS/Apps/Data). So, if you use that 1TB partition for both back ups, both drives (SL on your Mac Mini and ML on the external 1TB partition) will be backed up.

Time Machine with multiple users on single computer

Hi All,
I have an iMac at home with multiple user log ons. I'm about to get the Time Capsule and start using Time Machine (currently I use backup).
When I switch on Time Machine, does it switch on for all users, or will each user need to turn on Time Machine?
If I have to switch on Time Machine for each user, will each user's time machine back up the entire computer (so I'll have two complete copies on my computer on the external drive)?
If this does occur, can I control what Time Machine backs up so TM only backs up user specific information?
Thanks in advance,
Chris

When you first backup it will backup your whole system (user directories, system directories, applications, etc) unless you specify folders to exclude. When a user account is added to the computer, their home folder will be added to the backup in a similar way to if you added a new application. It will back up the directory structure exactly as it is on your main hard drive. The backup will essentially keep a copy of the whole hard drive on the backup drive.
The Time Machine will either be on for the whole system, or off for the whole system. It is not on or off for a specific user account. Users (depending on if they've got admin privileges) may have control over turning time machine on or off, but this does not change who can access the backups. All users will be able to invoke Time Machine to get to their backed up files.
Time Machine does not make separate backups for individual users. Instead, it preserves the permissions for backed up files, so while every user can access the backups, they cant just browse other users' files on the backup. The same restrictions on the main drive are carried over to the backup. Still, a standard user who's lost a file will be able to go into Time Machine, access a backed up version of the file, and restore it. Unlike standard users who are restricted from seeing other users' files in the backups, Admins are also restricted but they can be authenticated to view other users' files if they want to.

Using external NAS drive for Time Machine and multiple Macs

I just installed an external NAS drive from OWC's sister company Newer Tech. It is 500g with ethernet and usb2.0 connections. It works very well with easy setup with Time Machine with no hassle.
However, in very fine print that I missed in the ad, it supports 20 computers but not for Mac only for PC. OWC customer service said I could return it but I'll keep it anyway since it works well but only for one computer at a time in read/write mode.
Anyone know of a way around this? Are there any drivers from other vendors that would allow this to be used with the multiple Macs on my home network?

Very doubtful, but even if there is a workaround, you do not want to take that kind of risk with your backups.
See the pink and yellow boxes in #2 of [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).

A Few Little Time Machine Questions

I just got a 1TB External Drive from Western Digital (My Book Studio Edition.) I just used Time Machine on my Mac Book Pro and now all my files are backed up. But I have a few questions:
1. Does this mean that I don't have to manually drop and drag files into the External Drive?
2. Does this mean I can delete files off of my computer and retrieve them later from my External Drive? (If this seems like a dumb question, it's rooted in my misunderstanding of Time Machine - I'm not sure if it temporarily backs things up, backs things up only when you command it to, or backs things up permanently.)
Thank you!

crimson_ghost,
Your questions appear to be answered, but I'll chime in too with some (perhaps) additional information...
Time Machine is mainly a backup and recovery tool. It makes a comprehensive backup of your entire installation, including all installed applications and all user data. The intention is that you will be able to completely recover from any potential disaster, such as a total failure of your internal hard drive.
Each backup that Time Machine makes is a complete "snapshot" of your installation at the time of the backup, complete with each and every file on your computer. Time Machine is able to make this "complete" backup each time it runs- without consuming much, if any, additional disk space on the backup drive- by using an advanced file system feature called "multi-linked files." In this scheme, the data for a given file is only copied once to the backup drive, but multiple "hard links" that point to that data can be created. In effect, it is like having multiple phone numbers, all of which ring to the same phone. Each backup will contain one of these "hard links" that points to the data associated with a given file that has not changed since the last backup. If the file is new or has changed, the new data is copied to the backup, and a new string of hard links will be created. Since each additional hard link consumes almost zero space, many, many backups can be made without using much disk space.
An additional benefit of this Time Machine scheme is that we are able to "go back in time" to retrieve a file that may have been deleted from the "source," and there is a truly innovative interface for doing so. Some of the OS X and iLife applications even have "Time Machine awareness" built in, and the interface can be accessed from within those apps. Pretty cool.
However, this does not mean that Time Machine can be used as an "archive" tool. It can not be used in this manner, and you should not depend on using it this way! Especially if Time Machine is used in its "default" mode, where backups are made every hour, part of its routine is to regularly "thin" the backups. This process involves the removal of old backups that do not conform to the "one backup a day for the past week," "one backup a week until disk is full" rule. At some point, Time Machine will also begin to "expire" the very oldest backups, then remove them to make room for new ones. If you attempt to use Time Machine for "archival" storage of files that have been removed from the source (your installation), you will ultimately lose them.
Now, given the way Time Machine works, it will eventually consume all- or close to all- of the disk space given to it. So it makes sense to limit what we allow it to use. How much is appropriate, and how do we limit what it can use? That's easy enough to answer...
Time Machine needs at least twice the amount of space necessary for the initial backup. I say "at least," because it will work best when given closer to 3 times the amount of space needed. If your installation of OS X, including all your user data and applications, amounts to 100 GBs for example, you'll need to give Time Machine at least 200 GBs, and my recommendation would be more like 300 GBs. If you do not give it at least this much space, your backups will eventually fail. Time Machine first makes a new backup when it runs, and then goes about checking to see what can be deleted from the older backups. Because of this, it must always have plenty of "headroom."
Giving Time Machine more than the stated "3X" figure, though, is wasteful of precious disk space that could be used in more beneficial ways. For instance, by using that disk space for "archival" purposes
In order to limit what we give to Time Machine, it is necessary to partition the external drive. Multiple logical volumes can be created, and we can size these volumes to meet the needs of Time Machine. For various reasons (I could explain, if needed), I always recommend that the first partition be used for Time machine backups. If you do not know how to use Disk Utility to partition your external drive, just ask.
Scott

Time machine questions. Please help

So, I'm getting rid of my laptop and switching.    I've had my time machine external HD plugged into my airport extreme doing backups.   Well, I just plugged it into the laptop directly and hit backup
So is it really just as simple as plugging the HD into the next computer and hitting "restore"    Is there any extra steps?   Will it come back just like this one is set up?
I'm nervous that I accidently deleted an older backup in time machine through the finder to make space for the new back up.   I hope that doesnt mess anything up.    This backup is only like 90 mb.    IS that cause it took previous ones so its only adding the new data since the last backup an hour ago?
I want to not include my movies that are in iTunes,    They eat up about 60 gb of space and my new computer HD will be smaller.   Is tehre a way to do that? I currently have the movies themselves copied onto the external.    But cant seem to get them out of my iTunes library.    Couple of questions regarding that..
    1. Is this a good idea
     2. Is that the best way to do it
     3, will doing that mess with my backup at all?
     4. How do I get them out of my itunes library to shrink the overall backup?
If my backup IS larger than my new HD, can I pick and choose what I want to put into it or not? Or will it give me message saying the backup is too large?
I know this was a lot of questions. But if anyone could please help I'd greatly appreciate it.
Thank you for reading.
----Confused and nervous

In order to do a TM restore, that means erasing the hard drive and restoring from a TM backup which will put everything back the way it was before, including the operating system. However, since you're getting another computer, don't go that route. I would only use that when restoring to the same computer.
You said you deleted backups via the Finder. Wrong move. You may have damaged your TM backup. Always better to delete from within TM.
If you're switching to a new computer and you don't need backups from different times, I would erase that external and create a new backup, or clone your hard drive using Super Duper or Carbon Copy cloner.
With the new computer, when you first log in, you will be asked if you want to migrate your data. This is the Setup Assistant. You should have your backup drive plugged in and imediately migrate your user account from the backup drive. You can also migrate applications (any apps installed by you), or just reinstall them after if you want a clean installation. You should have the option to unselect any data from your user folder that you don't want to migrate.

Crashed OS MacBook Lion Time Machine Question

I have an older back up of my MacBook in Time Machine on a external hardrive.
Is is possible to add to the backup in target mode? The computer will not boot right now, but I can get to the volumes via target. I can access the revovery HD when I hold down the option key starting up.
The MacBook has some sort of infixable sibling error, which is getting pregressivly worse. Additionally I've up graded to Lion since the Origional back up and partioned the drive, so it wouldn't really match the origional Time Machine back-up.

I really appreciate both your efforts but let me clarify a few things here before you continue posting incorrect information.
#1 - I have not done anything in the Finder that will hurt anything. Opening a folder in finder is like going to the terminal and running a "ls" command.
#2 - The reason for my original post is becaue this is def. a bug or undocumented feature. Time Machine backups should be backwards compatible.
There is no reason for me to open Time Machine and not be able to open an older backup done in Snow Leopard, UNLESS, it is an expected issue. If this is the expected behavior, the first time one connects the drive, the system should provide some type of warning.
Time Machine displays my older backup dates in Time Machine, but I can't select them to read, restore or anything. Then I went to the finder to open the connected USB drive to confirm if the files were there or not, as my hard drive space is still occupied.
You CAN manually copy files from a Time Machine backup drive. This causes NO ISSUES, unless you start messing with the files that Time Machine uses to organize the data being displayed on the app.
I am a systems engineer, web developer, and systems analyst. I work on multiple operating systems (Unix, Windows, Solaris, Linux all flavors, and Mac OS). I have been working with operating systems since the MS-DOS no-Windows era. There is a very slim chance that I will mess up any operating system, especially OS X.
So, let me re-phrase my question: Is OS X Lion Time Machine backwards compatible or can it not ready Snow Leopard Time Machine generated backup files?
Thank you for any well informed replies.

Restore from time machine questions

Since update from snow leopard to time machine mac mini runs very slow. Too much beach ball. I want to do a clean install of lion and restore from time machine and have multiple questions.
1. I'm not sure if my time capsule password is the same as my airport, and if it is not where can I find it
2. If I install the os can I just tell the time machine that I am migrating to a new machine and that would be the most simple and painless? And if I did would that just restore broken extensions?
3. Will my keychain be restored?
4.What do I restore? Documents? All my files? Macintosh HD? Applications? Documents?
5. I'm using parallels primarily to run the windows version of Quicken. Will time machine restore that or do need to reinstall parallels and windows etc?
6. If I restore Applications folder will programs work or do I need to reinstall the programs?
7. Do I install Ilife or Iwork? Mobile me? Widgets? Printers, keyboard, etc?

Since update from snow leopard to time machine mac mini runs very slow. Too much beach ball. I want to do a clean install of lion and restore from time machine and have multiple questions.
1. I'm not sure if my time capsule password is the same as my airport, and if it is not where can I find it
2. If I install the os can I just tell the time machine that I am migrating to a new machine and that would be the most simple and painless? And if I did would that just restore broken extensions?
3. Will my keychain be restored?
4.What do I restore? Documents? All my files? Macintosh HD? Applications? Documents?
5. I'm using parallels primarily to run the windows version of Quicken. Will time machine restore that or do need to reinstall parallels and windows etc?
6. If I restore Applications folder will programs work or do I need to reinstall the programs?
7. Do I install Ilife or Iwork? Mobile me? Widgets? Printers, keyboard, etc?

Time Machine Questions

Hi,
I am still using Tiger and thought I would ask you guys who have already taken the plunge some questions I have on Time Machine.
Can Time Machine be used to achieve a full system backup? Can you restore your entire system using Time Machine?
Lastly, do you think Time Machine can be used as the only backup on my mac? I don't mind having multiple backup solutions, but would prefer keeping things simple! I currently use Super Duper to clone my hard drive and Backup 3 to backup my Home Folder! What do you guys suggest??
I look forward to your replies.
Regards,
Lucky Luxy

Can Time Machine be used to achieve a full system backup? Can you restore your entire system using Time Machine?
Yes you can use TM to make a 'complete' backup of your system. To do this DO NOT exclude the System folder from the backup.
A 'complete' system can be restored using the DVD Installer's Utilities->Restore from Time Machine backup
Lastly, do you think Time Machine can be used as the only backup on my mac? I don't mind
having multiple backup solutions, but would prefer keeping things simple! I currently use
Super Duper to clone my hard drive and Backup 3 to backup my Home Folder!
What do you guys suggest??
1) TM can be used exclusively for system backup. This is the simplest backup bundled feature available under Leopard. TM backups will also be capable to fully restore your system to any point in the past that you've backup. SD! cannot do this unless you keep many copies of the SD! clone around.
2) SuperDuper! is not yet compatible with Leopard so advise you do not employ it. When SD! is made compatible it will provide a faster way to get back into full operations after a boot HD failure that will Time Machine restore using the DVD Installer. If you lose the DVD Installer or don't have it on hand then SD! will rescue you.
3) Using Backup to backup your Home folder is OK to continue doing if you want a second backup of your Home folder along with the TM backups. You choice, but will consume more disk space.

Time Machine Questions, starting to plan for NAS

After a recent episode of serious data loss, I'm moving to a 2TB NAS solution for my 5-Mac home network. We are only using Time Machine on one system now.
My question is, does the destination disk for a Time Machine backup need to be exactly the same size as the home HD? That is, if you have a 300 GB directory to back up that lives on a 750 GB hard drive, does the TM destination need to be 750 GB exactly? Can it be larger? Can it be smaller (as long as there's enough space for the backup)?
Can multiple Macs using TM back up to a single large disk or disk array? That is, can each Mac on a network use TM to create separate backups on a single network drive?
Thanks.

several things.
1. TM backups to NAS drives are not officially supported. the only exception is a Time capsule. It also works with drives connected to an Airport Extreme base station. there are hacks for other NAS drives but you use them at your own risk.
http://www.macosxhints.com/article.php?story=20080420211034137&query=time%2Bmach ine%2BNAS
2. TM backups do not use compression. also, TM needs extra space to operate so the backup drive should be at least 20% bigger than the total amount of data you are backing up. otherwise the backup will fail. Further, because TM stores incremental backups you actually need a lot more free space than that. generally, the backup drive should be at least 2 times bigger than the total amount of data you are backing up. If you can't provide that, don't use TM, use some other backup tool.
3. Multiple MACs can use the same network drive for backups. each mac will create a separate sparse bundle. But you do need to make sure that you have plenty of free space on the drive to fit all those backups.

Time Machine showing multiple times in finder

One of my clients is having an issue where throughout the week the time machine volume will slowly keep adding multiple copys of itself to his finder sidebar. It seems like it is not unmounting after a backup and will clutter the finder sidebar. A reboot removes them but they always come back.

Are those backups on a network?
If so, yes, that does happen on occasion. Exactly why it happens isn't clear, but It may be that while the volume is mounted by Time Machine to do a backup, the user enters the "Star Wars" display to look at the same set of backups, and somehow with both accessing it at the same time, the last process to use it doesn't realize it needs to be unmounted.
It may also be that the backups aren't finished indexing when the backup completes, so doesn't unmount them.
You might want to try repairing them, per #A5 in Time Machine - Troubleshooting.

Time machine questions... how to use with an external drive etc.

Hi,
I am about to start using Time Machine. I have a few questions:
1. Can Time machine be used to restore data and applications / application settings?
2. I have a CalDigit VR eSATA drive which is 1TB RAID 1 which I was going to use as the Time Machine target drive.
Does Time machine store all of its data files in one main folder with many sub folders?
If my TM backup data takes up 600GB on the drive can I safely store other data on the 400GB or is it best to partition the drive HFS+ Journaled 600/400 and leave TM to its own dedicated partition?
3. Does TM keep adding data until it runs out of disk space and only then delete older BUs?
4. Is TM a good backup software for total recovery or is something like SuperDuper better? I would almost never use TM to recover a file that was deleted... but I am looking for a way to protect against data lost in the case of HD failure.

If you haven't found this yet, take a look here: http://www.apple.com/findouthow/mac/#tutorial=leopardtimemachine
That should give you a rough idea of the "look and feel."
1. Can Time machine be used to restore data and applications / application settings?
Yes, unless you tell it not to, it saves everything (except some system caches, temp files, etc.). If your HD fails, you can recover your entire system to a new/repaired HD via your Leopard install disc (it has the restore utility) and your TM backups. OS, apps (Apple and 3rd-party), preferences, settings, data, the whole system.
Does Time machine store all of its data files in one main folder with many sub folders?
As you may be able to see in the video, the small Finder window is very much like the main one; you can see your data in the same way. TM presents a "picture" that appears to be a full, separate backup of the way your Mac looked at any time. Of course, that's an illusion. It only actually copies files/folders that have been added or changed since the last backup.
You can't tell which items are "real" and which are the "multi-links" representing a file that didn't change on that particular backup.
For more info on the internals: http://www.appleinsider.com/articles/07/10/12/roadto_mac_os_x_leopard_timemachine.html
3. Does TM keep adding data until it runs out of disk space and only then delete older BUs?
Sort of. After an initial Full backup, it does incrementals (hourly, if you let it). Then it converts the first of the day to a daily backup, which it keeps for a month, and deletes the other hourlies after they're 24 hours old.
After a month, it converts one per week into a weekly backup and deletes the dailies.
It keeps the weeklies until it runs out of room, then begins deleting the oldest. But because of the "multi-links," it doesn't delete it's copy of anything that's still on your internal HD. So it manages it's space and deletions automatically and intelligently.
4. Is TM a good backup software for total recovery or is something like SuperDuper better?
They both have their advantages and disadvantages. Many of us use a clone plus TM. The clone advantage is, of course, being bootable. TM isn't. TM's advantages are the very fast incremental backups (it doesn't have to examine every file and folder to see what's changed): the ability to restore old items; and the ability to restore your entire system to a previous state, even if that's a prior version of Leopard!

Using Time Machine on multiple devices w/ Time Capsule on an exisitng Airpo

I recently moved home and my house already has an Airport Extreme network. When living alone, I used my TimeCapsule.
I have an iMac and a MacBook Pro that I had setup on Time Machine to back up wirelessly to Time Capsule.
How can I do this with the already existing Airport Network? Because I can't connect the Time Capsule to the actual modem from the cable company. I don't want to pay to get a second modem and I don't want a second network in my house.
*I just want the Time Capsule setup to wirelessly use Time Machine for both of my devices.*
Is this possible?
I looked in all the forum pages and could not find an answer.
Thank you,
Naitasia

I assume that you can "see" your Time Capsule if you open AirPort Utility and click Manual Setup, correct?
All you need to do is:
Connect an ethernet cable from one of the LAN <-> ports on the AirPort Extreme to the WAN (circle of dots) icon on the Time Capsule
Open AirPort Utility - click Manual Setup
Click the Wireless tab below the row of icons
Wireless Mode = None
Click the Internet icon
Connect Using = Ethernet
Connection Sharing = Off (Bridge Mode)
Update and the TC will restart in about 30 seconds and you have a green light.
On each of your Macs:
Open System Preferences (gear icon on the dock)
Open Time Machine
Click Select Disk
Click your TC to highlight it
Click Use for Backups
That will get backups going again. Post if you have any questions.

Time machine question - multiple accounts

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