Don't - HP 9130K Service Manual

General Information 1-7
Maintain Proper Temperature and Environment
The proper operating range for the 9130K is 10 C (50 0 F) to 44 C (111 0 F)
and 20% to 80% relative humidity. While temperature is usually easy to
control, it may be necessary to make special provisions to keep the humid-
ity in the proper range. Although the disc will continue to operate outside
the normal recommended humidity range, it will wear out more quickly
and will produce a higher error rate.
Avoid Magnetic Fields
Since the data is stored as a pattern of magnetic fields on the disc, it can
easily be erased by an external magnetic field. Avoid placing a disc near
power transformers, magnets or large disc memories. Additionally, while
HP goes to great lengths to confine the magnetic fields produced by CRT
deflection shields, CRT's with magnetic deflection systems have been
known to destroy data on discs, and it is a good idea to avoid placing discs
on top of CRT's.
Remove Disc from Drive when Not in Use
Remove the disc completely from the drive when access is not needed for
an extended period of time.
Use a Felt Tip Pen to Label Discs
Use a soft felt tip pen to label the disc, and be careful to write only in the
label area provided. Avoid the exposed media while labeling the disc. If
possible, write on the large labels BEFORE applying them to the disc
jacket.
Replace Discs Frequently
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Although discs are designed to provide several million revolutions of useful life (approx-
imately 2 to 4 months of use), they will eventually wear out. The life of a disc is VERY
dependent upon how carefully it is handled and how much it is used. If there are ever visible
signs of abrasions on the disc, do an immediate backup and discard the worn disc.
DON'T
Do Not Touch the Exposed Surface of the Disc
The thickness of a fingerprint is enough to lift the head off the disc and
cause errors (See Figure 1-2). The oils in a fingerprint will also collect dust
which can cause a disc to wear out sooner than it normally would. Be
especially careful when handling the disc as it is very easy to grasp the disc
with a thumb directly over the exposed media.