|Dec 6, 2008, 05:48 PM||#1|
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,
|Dec 6, 2008, 08:23 PM||#2|
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):
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