At 3:23 AM -0800 12/16/08, Randy B. Singer wrote: >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 I have to disagree here. The day 10.4 came out I bought a new HD for my system disk, it had a defective spot on it. If I'd zeroed out the drive I'd have found the bad spot prior to using it for two months. Once I filled up the drive to the point that I hit the bad spot the system freaked. That is the main time I've lost data due to a HD failure in over 20 years. I view zeroing the drive out as a good test of the HD. It doesn't hurt anything, the downside is that it does take a long time with the big drives we have now. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |