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!
Similar Messages
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What size external hard drive do i need for Time Machine
What size external hard drive should I get to be my Time Machine backup? My iMac is 1TB. (also, I have MBP that is 250gb and will need one for it as well)
Thank you.It is better to buy an external drive that has 3 times the storage capacity
as of the computer's internal HD.
Best. -
I have two external hard drives. One is my Time Machine backup drive. The other I use for external storage of files (documents, photos, movies, etc). Can I set Time Machine to backup BOTH my Mac hard drive and my other external hard drive?
Yes you can make multiple backups on one hard drive, for example if you’ve 1TB hard drive installed in your PC and you’ve two Mac Machines with 500GB drive each then you just make two backup images with size of 500GB each.
http://www.halfspot.com/use-your-pc-hard-drive-for-time-machine-backup/ -
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.
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I have an IMac with an external hard drive set up as a Time Machine for automatic backups. I want to add a second external hard drive and load my Aperture Photo Library on to it so that the library can be shared by both me and my wife. Is there a way to automatically backup the photo library that will be on the second hard drive to the Time Machine hard drive?
Open System Preference > Time Machine
Click Options....
Ckick on external disk in list and hit the - button below the list to remove from the Exclusion list
Allan -
Can I switch external hard drives and still access old Time Machine backups?
I have a Mac Book Pro linked to 2 1TB external hard drives, one used as my Time Machine Back up, the other used as a manual ad hoc back up and to store even older files.
The TM back up drive is now full. If I just unplug it/switch it off and plug in and set up a new 2TB hard drive as my TM back up, will I still be able to access the back ups on the original TM drive if necessary, through TM?
Wil it be a start over situation with the new drive, performing a complete back up to begin with?
Or would you advise me to transfer the old back folder to the new drive, given that it will be larger?Hi den.thed,
Thank you for this - I think the easy option by far appears to be to leave existing backups on disk 1, and plug in disk 2 and start over. -
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. -
Adding external hard drive to airport extreme for time machine error
Hello,
I recently bought an airport extreme that I wanted to combine with an external hard drive in order to do wireless time machine backups. I hooked this up and the hard drive shows up in the devices menu.
However, when time machine starts to backup, I get the following error:
"The backup disk image “/Volumes/Blackmer External MyBook/Benjamin Crispell Blackmer’s MacBook Pro.sparsebundle” could not be created (error 1)."
When my computer is connected directly to the hard drive, it works fine.
Any ideas on how to fix this?
Thank you.It is important to understand that Apple does not support Time Machine backups to a drive at the USB port of the AirPort Extreme. So, that may be an issue here.
Despite this, users try it anyway. Some appear to be successful for a time, some partially successful, some can't get it to work at all.
Even if it does appear to work initially, corruption issues may occur down the line without warning. Having tried this myself as a test a few times, I can attest to that.
If you want to try this anyway, the two important things to check are.....
The drive must be formatted in Mac OS Extended (Journaled). Other formats will not work
You almost always need to use a powered USB hub...even if the hard drive has its own power supply....because the USB port is under powered on the AirPort Extreme
You might also want to consider a secondary backup plan to protect your important files -
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.
GregorIt sounds like something went wrong with the drive. Did you drop it? How long has it been sitting around unused?
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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.
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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.
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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. -
I am trying to get space on an external hard drive which has some old time machine back up files that I do not need but can not eliminate, even by going into the time machine, clicking on the backup file to be eliminated and using the drop down menu with the gear box symbol to eliminate
I cannot find this 300GB "Backup" in the Finder, only in the Storage info when I check "About This Mac".
You are probably using Time Machine to backup your MacBook Pro, right? Then the additional 300 GB could be local Time Machine snapshots. Time Machine will write the hourly backups to the free space on your hard disk, if the backup drive is temporarily not connected. You do not see these local backups in the Finder, and MacOS will delete them, when you make a regular backup to Time Machine, or when you need the space for other data.
See Pondini's page for more explanation: What are Local Snapshots? http://pondini.org/TM/FAQ.html
I have restarted my computer, but the information remains the same. How do I reclaim the use of the 300GB? Why is it showing up as "Backups" when it used to indicate "Photos"? Are my photos safe on the external drive?
You have tested the library on the external drive, and so your photos are save there.
The local TimeMachine snapshot probably now contains a backup of the moved library. Try, if connecting your Time Machine drive will reduce the size of your local Time Machine snapshots. -
Why is my external hard drive showing up twice on Time Machine?
This is the first time I am using Time Machine because somebody recently gave me an external hard drive.
The external hard drive is appearing twice on Time Machine preferences. One of them is currently backing up and the other one says "Waiting to back up" but I don't want it to back up twice on the same disk.
Here's a screenshot:
Does anyone know why it is doing this?Triple-click anywhere in the line below to select it:
tmutil destinationinfo
Copy the selected text to the Clipboard (command-C).
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 icon grid.
Paste into the Terminal window (command-V).
Post any lines of output that appear below what you entered — the text, please, not a screenshot. -
Hard drive packed up, but had Time Machine backup. I installed new ssd and upgraded to Mountain Lion, but I can't find iPhoto library and photos or iTunes songs? Is there an answer to this? A backup run did not install either photos or songs. Graham
Thanks so much but none of that helped. It was driving me crazy because it would back up another external drive. I just changed the name of the drive from iPhoto/iTunes Library to Media Libraries and IT WORKED!! I guess for some reason it didn't like the drive being called iPhoto or iTunes ???? I don't understand but I have tried so many solutions and exchanging things out but the name change did it????!!!
Thank you for your help and replying to this. Guess I made my own issue!
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