Apple II - Page 69

Coring for 3.5-inch disks
The most imporUnt rule in caring for l.5-inch disks is never to
open the shuner and touch the disk beneath it Also, keep lhese
rules in mind;
• Keep disks away from trnIgnets or devices conuining ITI2gnets, like
telephones, television .sets, unshielded monitors. copy sunds
with ITI2gnelic paper holders, batteries, and large mOlors.
• Keep disks away from moisture.
• Keep disks away from direct sunlight and extremes of heat and
cold; On a hot day. the heat that builds up in car (tunks, on
dashboards, and in glove compartments can ruin a disk
• Don't
usc an enser on a label. Eraser particles can datrnlge the
disk if they get under the shutler
•
To keep dust and olher foreign trnItler aW2Y from the disk Itself, do
nOl slide the shutter open.
-> Dusl and Ihe 35-fn£h d!sk. Dust is nOI a danger to the 35-inch
disk itself Hov.'Cver. inuodudng dust into the disk drive could
cause problems. Although the plastic envelopes thai come with
3.5-inch
disks affor-d some pror.eclion against dust, they tend to
be more trouble than they're worth.
How 3.5-inch disks work
When you put a disk inlo the drive, the drive slides the shutler open.
exposing the disk itself to the read-write bead, and then spins the
disk inside its jacket As the disk spins, this head either reads data
from the disk Of writes new (\au on the disk.
When you save your work on a disk, the read-write head records
your work on the disk as magnctic patterns, When you load
information into
the computcr's memory, the read-write hcad
copies thesc patterns from the disk. This is much likc the activity of
thc record and play heads on a cassettc recorder. 'llte disk records
and plays data patterns; the casselte records and plays sound
patterns, Chaptcr 4, ··l1te Inside Story: covers the relationship
betwCCn the computcr and the disk in morc detail.
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