Lion won't install can't select hard drive that is used for time machine backups

I installed Lion, agreed to the eula but both drives are greyed out. My Macintosh HD - ( this dirve is used for time machine backups) and my external drive (this drive does not use the GUID Partition Table scheme...). Though I don't use time machine, I tried turning it on and selecting the external drive with no luck. I'm stuck - any ideas?

"Backups.backupdb" if the file in Time Machine. As the discussion says, you have to find that file and trash it. Try spotlight to locate it. If that does not work, down load OmniDiskSweeper from the Internet (free) and go through an organized search to find "Backups.backupdb". If that takes too long or is too tedious, then if you have everything backed up, erase the HDD and start from square one.
Ciao.

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I want to know about time machine if i can use the hard drive that i use for time machine back up as a normal hard drive too or if it's only for time machine

I want to know about time machine if i can use the hard drive that i use for time machine back up as a normal hard drive too or if it's only for time machine
and if it yes i want to know if i have 1TB hard disk to use the 500gb for time machine and the other 500gb for normal use

thank you very much because i am considering to buy the porsche design hard disk 1TB and i want to have it for normal use and for time machine is a pitty to give 1TB for back up only again thanks and i know seperate the back and the working jobs are better but the i have to have 2 hardisks and i want only 1

HT4718 I have an external hard drive that I used as Time Machine Backup. I have not used it for a while and now, when I plug it in computer says: This disc is not readable. I want to recover the backups and not erase and reformat the disc. Thank you in

I have an external hard drive that I have used as Time Machine backup, but not for a while. Now when I plug it in, computer says this disc is not readable.
I want to keep the backups on it and not erase and start over.
Thank you in advance.
Gregor

It sounds like something went wrong with the drive. Did you drop it? How long has it been sitting around unused?

On imac 10.6.8 using current version of Aperture. How can I access the Aperture Library on my external hard drive that I use with time machine for backup? I can only access the application but not the library..

On imac 10.6.8 using current version of Aperture. How can I access the Aperture Library on my external hard drive that I use with time machine for backup? I can only access the application but not the library..

Go into Time Machine (the program not the bundle on the extrnal disk) and using Time Machine's browser go to the Folder where the library lives. You could look in the library bundle in Time Machine but that won't really tell you much,
If you want to make sure it truely has backed up your library you will need to restore it and open the restored library with Aperture.
If all this still has you confused you need to read up on Time Machine in order to get a feel for how it works, for what it is doing and for how to restore files from it.

Can you unplug the external hard drive you are using for time machine

can you unplug the external hard drive you are using for time machine and then plug it back in and it work normals because i have a mac book and don't want to always be carrieing the external hard drive every where i go so can you ?

Yes, that will work fine. It will back up normally once you plug it in again. I do this with my MacBook.

Can I encrypt a USB hard drive that's not for time machine?

can I encrypt a USB hard drive that's not for time machine?

Yes, if it has the GUID Partition Map Scheme, but only by erasing it and choosing a new format.
See #2 in Using Disk Utility.

"Mac OS X cannot be installed on 'Macintosh HD'. This disk is used for Time Machine backups."

I am trying to upgrade our MacBook to Snow Leopard, but when prompted to select which hard drive to install on and "Macintosh HD" is selected, the following message generates: "Mac OS X cannot be instaled on 'Macintosh HD'. This disk is used for Time Machine backups."
I disabled Time Machine switched it "off," put it in the trash can, then "Secure Emptied" the trash can. I also rebooted. Then I connected an external hard drive thinking that might help, but for some reason I still cannot proceed with the Snow Leopard upgrade because "the disk is used for Time Machine backups."
WHAT is the DEAL!?

It doesn't sound like an upgrade would work very well anyway. Make sure you have a good backup and repartition the startup volume. Then install Snow Leopard onto the hard drive and migrate your old users and applications.

Lion Install does not work, says "This disk is used for Time Machine backups"

I'm having trouble installing Lion onto my macbook pro intel core 2 duo.
I am backing up my computer with an external drive using TimeMachine, but i've disconnected it. Also i'm running SL 10.6.8
I have a windows 7 partition that was created with boot camp.
I've tried to make sure everything is all ready for lion but when I go to install lion it says "This disk is used for Time Machine backups" and the hard drive is grayed out.
Same problem as this guy: https://discussions.apple.com/thread/3190321?start=0&tstart=0
I'm hearing that a file called "Backups.backupdb" is on the top level of the hard drive, but I see no such file. I've looked at the invisible files and I cant find it.
I've also created a bootable flash copy of the lion install but that does not work It gives me the same message "This disk is used for time Machine backups".

"Backups.backupdb" if the file in Time Machine. As the discussion says, you have to find that file and trash it. Try spotlight to locate it. If that does not work, down load OmniDiskSweeper from the Internet (free) and go through an organized search to find "Backups.backupdb". If that takes too long or is too tedious, then if you have everything backed up, erase the HDD and start from square one.
Ciao.

Macbook Pro -yosemite install stalls at disc select with ''This disc is used for Time Machine Backups' - help !

Having downloaded Yosemite it installed fine on my iMac but on my Macbook Pro installation has frozen at the Disc Selection stage (where you want it to install) with the message 'This disc is used for Time Machine Backups'.
I cant find a way past this to complete the installation.
Any ideas anyone ?
Many thanks.

Time machine needs its own partition to operate. So you are not going install a OSx Lion on that volume.
If there is enough room you may be able to partition the drive on the fly with DiskUtility
Are you saying you clean installed Lion and you are trying to move your user Data over with TM via the migration Assistant? Please explain.

When ever the power goes out or I restart my iMac the external hard drive that is used by Time Machine for backups is dismounted ?

When ever the power goes out or I restart my iMac the external hard drive that is used for backups by Time Machine is dismounted and all backups are gone. I can reselect it and it will start working again, but I am worried if the iMac hard drive should fail will I be left without a backup ?

fzgy wrote:
"Mac OS X can't repair the disk. You can still open or copy files on the disk, but you can't save changes to files on the disk. Back up the disk and reformat it as soon as you can."
It's possible a heavy-duty 3rd-party disk repair app can fix it, but they're expensive (DiskWarrior is about $100), and there's no guarantee it can do it.
Am prompted to reformat but I don't have a good understanding of what this means and how to do it.
That will erase it. See Time Machine - Frequently Asked Question #5.
It sounds very much like the disk is beginning to fail, although it's possible there's a bad port, cable, connection or power supply (if it has its own).
I'd suggest getting a new one, and using it for your Time Machine backups; once you have a good backup there, reformat the old one (and select Security Options to write zeros to the whole drive -- if that fails, you know the drive is toast). Use it for secondary backups, per FAQ #27. If it has failed, get a second new one for secondary backups.

My external hard drive has been used for Time Machine, now it doesn't work on my TV?

I bought a new external HD 3TB, I used it as a back for Time machine and also wanted to use it for watching my movies etc on my TV. The TV won't recognise any video's on the HD. Is there some reason this would happen due to using it for Time Machine?

If you are talking about a drive that you connect directly to your TV, typically they will recognize only drives formatted in some specific way & only certain kinds of movie files. You can check your TV users manual or its manufacturer's web site for information about this, but in general they will not recognize drives using the format Time Machine requires.

My mac mini quit recognizing the external hard drive i am using for time machine.

I have an IOMEGA external hard drive hooked up to my mini for Time Machine. It was working for about 4 months then quit. The PC will not recognize the hard drive and I have switched usb cables and tried different ports to no avail. Any help would be gladly appreciated!!

Yes, that will work fine. It will back up normally once you plug it in again. I do this with my MacBook.

How big an external hard drive do I need for Time Machine backups?

I run a 2 Ghz iMac with 1Gb memory, currently using around 108 GB of the 150 GB available memory.
Hpw larghe an external hard drive do I need to run Time Machione efficiently? 500GB? 320? 520?

Not answered - don't know why!

Can i partition an external drive that im using for time machine? its not an actual apple TM....

I'd like to partition my drive to make a separate place just for itunes music , is this possible? if so, how ?
thanks!

tamckellar wrote:
im just trying to make a separate area on the ex drive that i use for tm, to store just my itunes library .
Not a good idea...If that drive fails (and they All do at some point in time) you will lose both your TM and iTunes Backups.
Invest in another EHD for iTunes.
Moving iTunes > http://support.apple.com/kb/HT1751
Also...
Have a look at these 2 Videos...
http://macmost.com/moving-your-itunes-library.html
http://macmost.com/moving-your-itunes-media-to-an-external-drive.html

HT4848 Is it possible to partition an external hard drive that is already being used for Time Machine backups without it being erased?

I'm want to use my current external hard drive, which I use for Time Machine Backup, as a recovery disk for Mac OS X Mountain Lion 10.8.2. From what I have read, the recovery disk assistant will erase all data on the external drive unless it is partitioned. Can I partition my current backup drive without erasing it, even though it is already being used for Time Machine?

It's very simple to test. Turn off your computer. Have your time machine backup plugged in. Hold option and turn it on, keeping option held. Do you see your time machine drive? If so, select it and press enter. You'll end up in recovery. If it works, there you go. Then just click the apple and restart to get back to your regular desktop. Then you'll know for when you're ready to do the deed.
Edit...
I'm not sure if time machine will think it's an entirely different computer, though, when a hard drive changed, making an actual restore not doable. Either way, you could still reinstall mt lion fresh and then just migrate after, skipping the need for SL.

Lion won't install can't select hard drive that is used for time machine backups

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