Go Back   MacRumors Forums > Apple Systems and Services > Mac Basics and Help

Reply
 
Thread Tools Search this Thread Display Modes
Old Dec 6, 2008, 05:48 PM   #1
bonnsotto
macrumors newbie
 
Join Date: Dec 2008
New to Mac: need help with time machine and external HD.

Hi everyone. Just bought my first iMac. The HD is only 320Gig so my wife and I bought an external Western Digital 1 terabyte HD. I want to use this as my backup using time machine. It is a brand new drive with no files in it and only has utilities that came with the HD. The time machine is asking me to format the drive and erase all its contents. This drive is just going to stay with the Mac (we have a PC as well). Will formating this drive affect it at all? After formating and we store files in the drive (pictures, movies, etc), will time machine continue to erase the contents when backing up?

Thanks in advance,
Bonn
bonnsotto is offline   0 Reply With Quote
Old Dec 6, 2008, 08:23 PM   #2
sickmacdoc
macrumors 68020
 
sickmacdoc's Avatar
 
Join Date: Jun 2008
Location: New Hampshire
No, it will only be formatted one time- and that is only needed because virtually all external drives come pre-formatted for use with PCs (either a NTFS or FAT32 format). Time Machine requires a drive formatted in a Mac format (specifically Mac OS Extended), hence the request to format before starting a Time Machine backup.

After formatting, the drive will be able to be used for anything you would like to store on it with your Mac. Time Machine keeps its backup files in a separate folder on the drive so as long as you don't try to store anything within that folder you will be fine.

Do keep in mind that the files you store on the drive alongside Time Machine will not be backed up however since TM obviously does not back up the drive its backups are on. If you would like those files backed up, you need to prepare your new drive by making two partitions on it with Disk Utility prior to use-- one for the Time Machine backup files and another for your file storage. Time Machine can then be instructed to include the second partition in its backups.

If you need some assistance with partitioning, the following is copied from the Disk Utility's Help menu entry (my additions are in red):
Quote:
To partition a nonstartup disk:

If youíre partitioning an external hard disk, make sure itís connected to your computer.

In Disk Utility, select the disk in the list (on the left) that you want to partition.

Click Partition (in your case choose "2 partitions").

Choose the number of partitions from the Volume Scheme pop-up menu.

Click each partition and type a name for it, choose a format (choose Mac OS Extended (journaled)), and type a size. You can also drag the divider between the partitions to change their sizes. If a partitionís name has an asterisk beside it, itís shown larger than its actual size so its large enough to display its name legibly.

If youíll be using the drive on a Windows computer, click Options, and choose the Master Boot Record partition scheme (also known as fdisk). (Actually, do that anyway and choose "GUID" to change to an Apple partition map since your disk came formatted for Windows)

Click Apply.
If you have other questions ask away- somebody will be happy to answer!
sickmacdoc is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Systems and Services > Mac Basics and Help

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Mac (Time Machine) and PC compatible External Hard Drive - Is it Possible? Hustler1337 Mac Peripherals 2 Sep 1, 2013 01:33 PM
Mac HD - External HD - Time Machine (?) SuperNova4239 Mac Basics and Help 5 Aug 27, 2013 07:00 PM
Can't use Time Machine with external HDD on a networked Mac? NMF Mac OS X Server, Xserve, and Networking 21 Jun 26, 2013 06:44 PM
Backing up an external drive and mac on two separate drives with Time Machine Martin00 Mac Peripherals 4 Mar 22, 2013 11:47 AM
How do you format an external HDD for Mac, Time Machine & PC? Minxy Mac Basics and Help 3 Dec 11, 2012 02:54 PM

Forum Jump

All times are GMT -5. The time now is 05:03 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC