At 21:25 +0000 7/30/01, Robert S. Atkinson wrote:
>on 7/31/01 12:34 AM, Tom Bridgeland at [EMAIL PROTECTED] wrote:
><snipped>
>> On the other hand, turning it off defragments the HD, so it
>> needs to be done once in a while to keep things smooth.
> This is the first time I ever heard of this. It really defrags the HD?
>Is this documented somewhere?
Turning it off (or even just restarting) will defrag your _memory_,
not your hard drive. Defragging a hard drive is a long and arduous
task, and couldn't be done when the drive is off. FWIW, with HFS+ and
the advent of massively really huge hard drives, defragging is
largely irrelevant unless you're in the habit of keeping your drive
near capacity or you're doing digital video. Drives don't usually
start getting fragmentation until they're rather full, and larger
drives take longer to fill, so they tend to be fragmented less. For
example, the 10GB drive in my iMac hasn't been defragged since I
bought it (Dec 1999), but it's never had more than about 6GB of data
on it. The drive is only about 1% fragged. OTOH, my PowerBook also
has a 10GB drive but I've only had it about 6 months. It routinely
runs with only a gig or so free, and fragmentation is somewhere
around 10% (that's fairly really horrible bad).
YMMV.
Jeremy
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