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THE LIMAC FORUM/MAY 2009

General meeting time schedule:

Meetings are held at The New York Institute of

Technology, Building 300 (Anna Rubin Hall),

Old Westbury, Long Island.

Meetings start promptly at 7:00

p.m.

Bradley’s Q&A: 7:00 – 7:30 p.m.

MacBasics Q&A: 7:00 – 7:30 p.m.

More on iWork: working with and modifying templates

in Pages; a brief look at Numbers; creating a simple

presentation with Keynote.

Featured Presentation: 7:30 – 8:20

p.m.

followed by announcements and rafﬂe

drawings.

SIG Meetings: (Special Interest Groups)

DTP/Photoshop SIG 2009: 8:30 – 10:00

p.m.

The Mac Coloring Book: Create a line drawing from a

photo and color it again like a kids coloring book.

| In bad weather, call (516) 686-7789.

| The next LIMac board meeting will be at

the Plainedge Library, (516) 735-4133, on

Wednesday, February 18th, at 7:45

p.m.

President’s Message

Do you need to defragment your hard drive?

I heard the Mac operating system does this for

you. And if so, how can you do that?

■ Most people don’t need to. For those who need to know

more, I’ll elaborate: Say you create a new text document as you

start a term paper, and call that Chapter 1. Then you create and

save a second file, called Chapter 2. Later you do back to add

more text to Chapter 1. The new text has to be saved to disk

after the Chapter 2 data as Chapter 1 was constrained to a small

allocation block of disk space. (A allocation block is the smallest

portion of the disk a file can take up, even if not all of it is actu-

ally in use. You may see a 62 byte alias taking up 4 KB because

of the allocation block size.) So the Mac OS X keeps track

of these ‘extents’ for each little piece of your files, which can

get longer and longer as you edit random files. The problem

with a fragmented file is two-fold. If there is extensive direc-

tory damage, a fragmented file cannot be recovered as the Mac

cannot locate the various pieces (extents) of the file. Perhaps a

bigger problem for time sensitive audio and video editors is the

time it takes for the hard drive to seek the various parts as the

file is loaded into memory. Ever since Mac OS 10.2, the system

has had delayed allocation which combined a number of small

disk allocations into one larger allocation thus avoiding some

fragmentation. Also since Mac OS 10.3 (Panther) the system

has had hot file adaptive clustering which will defragment slow-

growing files. It will transparently defragment files smaller

than 20 MB and broken into eight or more pieces as the file is

opened. Many modern applications will rewrite your data files

as they are saved rather than appending new data which will

avoid fragmentation as well. Of course your hard drive is mostly

filled with static small files, perhaps parts of application pack-

ages. You could easily get these non-user files fragmented by

an updater program. Still the graphic, audio and video profes-

sionals who make large files can benefit from defragmenting

or optimizing their hard drive’s files and the free space around

them. Say you were running low on disk space on your startup

drive and Photoshop is reporting that the scratch disk is full, so

Bradley’s Tech Session

Bradley Dichter

Technical Advisor

bdichter@optonline.net

Bill Medlow

President

archbill@optonline.net

LIMac has a number of great presentations that

will be running through the summer months.

Just check out our web site calendar by looking under the Monthly

heading for the calendar http://www.limac.org/calendar.html.

Computer software only gets bigger, better, faster, more elegant

and consume more of your time and it changes every 16 months.

This is probably why so many mem-

bers still use AppleWorks. In the April

meeting, Tom Abruzzo showed

us how we could use the suite of

applications called iWork ’09. This is

composed of Pages ’09 (word pro-

cessing), Numbers ’09 (spreadsheet)

and Keynote ’09 (presentation). It

is much easier to use than Microsoft

Word and possibly more efficient for

just writing a letter. For getting the word out, do you really need

that 900 pound gorilla? It imports and exports all the big stuff. Try

it, you may like it.

Don’t miss these meetings! 0

DAN DANGLO

Bradley’s Tech Session continued on Page 3

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