112 Macintosh
User's
Handbook
The
malfunctioning
of
a disk is usually not a physical
issue. The Mac's disks are very sturdy and remain useful for a
long time. The Mac might, however, damage the software on
the disk through its normal disk operations. When this occurs,
the Mac will most likely refuse the disk and display a system
error
message. When the message appears, the best option
is
to
punch out the disk as described on page 300
of
chapter
9,
Troubleshooting and Operating Hints. Reinsert the startup
disk and select Restart from the error message box. The Mac
should restart normally.
If
you try
to
restart the Mac with the bad disk, the error
will probably recur.
If
the disk was
not
a startup disk, the Mac
will refuse it. Inserting a system disk
at
this point might result
in a
lockup situation.
That
is, the Mac will do nothing and will
not
return the disk. To cause the disk
to
eject, you can punch it
out,
or
you can
turn
off the Mac.
Then
turn
the
Mac
back
on
and press the mouse button. After a
few
seconds, the disk
should eject.
If
the
data
disk software
is
damaged, the error will recur if
the operator tries to reuse the disk. The procedure for accessing
data
on
such a disk
is
outlined
on
pages 298-301
of
chapter
9.
We
feel that the best method
is
to
insert the disk and press and
hold the Command and
Option keys. This command forces the
Mac
to
read the disk.
USING THE OPTIONAL SECOND DISK DRIVE
The optional second disk drive can make data handling
much easier. Normal operations with a second drive available
might proceed as follows. Turn on the Mac and insert the
operational disk into the main disk drive. Then insert the
applications disk into the optional disk drive and copy the
applications, which are appropriate
to
the day's work, to the
operational disk. Then eject the applications disk, insert the
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