Can't reformat hard drive for time machine

winterdude010

macrumors regular
Original poster
Feb 24, 2006
194
1
New York
Hi,

Just got done installing Leopard, and when it recognized that the external hard drive was is MS-DOS format, it started to reformat it. However, a few seconds after the reformatting begins, and error message pops up saying that the formatting system failed. Why won't it reformat?

My external drive is a:

Western Digital My Book Essentials 750GB External Hard Drive
 

mkrishnan

Moderator emeritus
Jan 9, 2004
29,777
12
Grand Rapids, MI, USA
The problem is that the disk has the wrong partition scheme to host a Mac partition. For this reason, you can't reformat it directly. You must first re-partition it.

Don't use the Time Machine prompt to reformat it. Open Disk Utility, go to the partition tab, and set it up as a single MacOS Extended / Journaled (HFS+) partition using the GUID scheme (you may have to click on the options button). Then let it partition the drive. After that, it should work fine.
 

winterdude010

macrumors regular
Original poster
Feb 24, 2006
194
1
New York
OK. Solved the problem. I partitioned the drive as free space, and then partitioned it as MacOS Extended/ Journaled and it worked.
 

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