
Re: Disk defragger besides Norton?
Peter R. Fletcher wrote:
> On Sun, 24 Oct 2004 09:25:30 -0400, Bob Willard
> <BobwBSGS@TrashThis.comcast.net> wrote:
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> On what basis do you say that "defragging has little value on most
> PCs"? My experience it that it depends on how much free space you have
> on the disk partition, but that disk fragmentation can make a
> significant difference to Windows performance. On my own system, where
> none of the partitions approach half full, the boot partition gets
> very fragmented, but I would have to admit that this doesn't seem to
> slow things down perceptibly. On my wife's system, which has the same
> motherboard, an only slightly slower processor, and a comparable hard
> disk, but where, for "historical" reasons, the boot partition only has
> 15-20% free space, there is an easily perceptible slowdown
> (particularly of program loading) when this partition needs
> defragmenting, and a comparable speedup when this has been done. Both
> systems have their swap files on separate dedicated partitions, so
> this isn't a swap file fragmentation problem.
>
> Please respond to the Newsgroup, so that others may benefit from the exchange.
> Peter R. Fletcher
On the half-dozen NT/W2K/XP PCs I've had, I've never noticed any difference
in performance resulting from running defrag. On the half-dozen W9x/W3.x
PCs I've had, I kinda think I sometimes noticed a difference, but it was
marginal at most. Some of those PCs - esp. the W3.x and early W9x ones -
included parts, boot and non-boot, that were >75% full {since I did guess
wrong about part. growth, and did not juggle the parts or the files until
defrag would no longer run}; still, defrag made little or no difference.
By contrast, my experience with RCs (you know, Real Computers ;-) running
real OSs) showed some substantial-to-enormous gains from defragging. There
were many reports from VMS users on the value of defragging -- even from
the early years of VMS when its filesystem did not support on-line defragging
and so required shutting down the system for a backup/restore cycle to
accomplish a defrag. I did a survey a few times of the dozen or more VMS
RCs on which I had accounts, and found that the HDs averaged, IIRC, ~85% full.
--
Cheers, Bob