On Dec 15, 2008, at 5:58 PM, zapcat wrote: > I just got a couple of new external Drives, which come formatted > for PC. before I use them, I will reformat them for Mac of course, > but is the simple reformatting good enough, or do I need to write > Zeros to these discs first? No, you do not need to write zeros to the drive. Previously folks did this to map out bad blocks on the drive, but with modern drives you don't need to do this manually because it is accomplished automatically on the fly. However, you do need to do a bit more than simply reformat your new drive. In the Bombich Forums is an excellent post on how to properly prepare your external HD before you use it: http://forums.bombich.com/viewtopic.php?t=4084 ___________________________________________ Randy B. Singer Co-author of The Macintosh Bible (4th, 5th, and 6th editions) Macintosh OS X Routine Maintenance http://www.macattorney.com/ts.html ___________________________________________