> Leythos wrote:
>> In article <(E-Mail Removed)>,
>> (E-Mail Removed) says...
>>
>>>Will deleting all the "junk" from one's HD make the computer run
>>>faster? If so, how?
>>
>>
>> File fragmentation is always a concern once the level of fragmentation
>> starts impacting performance. You see this on systems with marginal space
>> remaining for files.
>>
>> In some instances you see a marked difference in performance as the
>> read-write heads don't have to MOVE to another sector across the disk,
>> they can just keep moving in a sequential manner. On fragmented disks,
>> any file that is fragmented requires the heads to move to another place,
>> which requires a read/write delay, before data movement can resume.
>>
>> On a drive with 50% free space, fragmentation, in most cases, means
>> little and there should be enough space that the drive has very little
>> fragmentation, but, keep in mind that a drive will fill sequentially,
>> meaning that of you have a 100MB file, and the next space free is only
>> 50MB, it will break the file into two (or more) parts - it does not look
>> for an open 100MB space.
>>
>> In the early days I owned a 386/16 and a single drive, I had to sort a
>> 30MB file and it was taking forever, I estimated 28 days to complete the
>> sort. Understanding the mechanics of the head having to read, then move
>> across the drive to an open space, write, then return and repeat, I
>> bought another hard drive for the system. When I ran the sort this time I
>> told the application to read from drive 1 and write output to drive 2, it
>> was done in 13 hours. This has little to do with fragmentation, but it's
>> a good example of how head movement can cause delays.
>>
>> The same is true with the registry, the less you have to search the
>> faster a registry call will be.
>>
>
"Raymond J. Johnson Jr." <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Your allusion to a dinosaur machine and hard drive is the source of the
> current fallacious beliefs about compulsive defgragging. Modern drives are
> much smaller physically and much, much faster, making the need for
> defragging much less significant. Add NTFS to the mix and regular
> defragging is unnecessary. In fact, the argument could be made that the
> significant activity of defragging actually shortens the life of the
> drive. Perhaps not by much, depending on how often one defrags, but in
> most cases there's no real payback unless there's a specific performance
> issue.
Raymond Johnson, as usual, brings a practical and sensible approach to this
issue as he has previously done with respect to the multi-partitioning craze
that seems to be so prevalent these days.
With respect to the supposed value of defragmenting hard disks in today's
personal computer environment, you may be interested in a report in the
February, 2004 issue of PC World magazine, in which they reported their
evaluation of defragmenters. Here's the pertinent excerpt from their
article...
"When the PC World Test Center set out to determine the effectiveness of the
defrag utilities in our set of suites, plus that of Diskeeper 8 from
Executive Software, our analysts found no evidence that defragmentation
enhanced performance. On a desktop system from the PC World office with a
heavily used, never-defragmented hard drive, the lab conducted speed tests
using a range of applications before and after defragmenting the drive with
each utility. In the end, the Test Center saw no significant performance
improvement after defragmenting with any program. This result flies in the
face of the perceived wisdom that fragmentation hinders performance, though
much older PCs (with slower and smaller hard drives) and heavily used
servers may benefit more from defragging."
I might add that about three years ago, some colleagues and myself performed
rather extensive tests of a number of third-party defragmenters as well as
the built-in defragmenters in Windows 98 and Windows Me, and to some extent,
in Windows 95. Our objective was to determine which one(s) were most
effective in defragmenting a hard disk in terms of enhancing speed
performance. To our surprise (at least for most of us!) we came to the
conclusion that *none* of the defragmenters resulted in any performance
enhancement. We measured some of the common tasks undertaken by the computer
user, e.g., bootup time, accessing programs, search & replace functions,
manipulating digital images, and the like. The conclusion we drew was
identical to that of PC World, i.e., there was no meaningful performance
enhancement resulting from the use of defragmenters. At the time we
concluded these tests Windows XP was just coming online so we didn't conduct
any extensive tests on that OS, but from some cursory tests we ran using
XP's built-in defragmenting utility, our previous conclusions concerning the
ineffectiveness of the defragmentation process remained unchanged.
Art