Info-Mac 3/Info_Mac_1994-01.iso/Disk/SCSIMaster/A WARNING!!!

Text File | 1993-11-15 | 6KB | 103 lines

PLEASE READ THIS BEFORE INSTALLING SCSIMASTER™.  YOU MAY BE VERY
SORRY IF YOU DON'T.  EVERYONE SHOULD READ ALL OF THIS DOCUMENT!

SCSIMaster™ 1.1 is NOT compatible with the Mac Plus or any earlier
Macintosh models.  DO NOT INSTALL SCSIMaster 1.1 on any Mac Plus.
You will not be able to boot the Mac Plus if you do so.  The Mac
Plus will CRASH at boot time - even if you try to boot it from
a floppy.


BEFORE INSTALLING SCSIMaster™ ON ANY MACINTOSH.

Please make sure that you have a floppy disk from which you can
successfully boot your computer BEFORE you install SCSIMaster™.
It could save you much GRIEF.
Make sure you TEST the boot floppy by booting from it as well,
just to make sure that it works.  Copy SCSIMaster™ onto this
floppy so that it will be easy to remove SCSIMaster™ from your
hard drive if there are any problems.  Make sure that you have at
least one copy of SCSIMaster on a floppy drive.  Do NOT keep only
one copy stored on your hard drive.  If you do this and you have
a problem booting your Macintosh you will not be able to remove
SCSIMaster™ from your computer because the only copy you
have is on the hard drive.

SCSIMaster™ has been tested on the following Macintosh models:  Mac
Plus, Mac SE, Mac II, Mac LC II, Mac SI.  It works on all of those
models EXCEPT the Mac Plus.  SCSIMaster has not been tested on any
other Macintosh models.  It should work on Macintosh models newer
than the Mac Plus that have Motorola 68000 - 68030 microprocessors.
SCSIMaster™ has never been tested on Macintosh models with the
Motorola 68040 microprocessor (Quadras and Centris).  It is possible
there may be problems running SCSIMaster™ on those machines.  It has
not been tested on the Mac IIFX which has 2 different SCSI buses.
If you want to use SCSIMaster™ on one of the models that has not
been tested, then please read about what must be done to remove
SCSIMaster™ from your Macintosh in case of boot problems BEFORE
installing it on your computer.  If you own a model that has not
been tested and you do not know how to open your Mac and disconnect
the SCSI signal cable from the internal SCSI disk drive, then you
should NOT use SCSIMaster™.  Also, if you successfully install and
use SCSIMaster™ on an untested model please make sure to register
and tell us which model Mac you use SCSIMaster™ on.  If you have
problems on any untested model please let us know that as well.

YOU HAVE BEEN WARNED!


WHAT TO DO IF YOU CAN'T BOOT YOUR MAC AFTER INSTALLING SCSIMaster™.

Now, if you ignored the warning about installing SCSIMaster on a
Mac Plus, or if you have a newer model Macintosh and you still
have problems trying to boot your machine after installing
SCSIMaster then here is an explanation of what you must do to
remove SCSIMaster from your machine.

If your machine crashes at boot time then booting from a floppy
with the hard drive connected to the Mac SCSI bus will not be
successful.  The Mac will crash regardless of the fact that you
are trying to boot it from a floppy drive.  The problem is that
the Mac always reads SCSI drivers off of the SCSI drive and calls
them to install themselves before it reads the system information
off the floppy you are trying to boot from.  The Mac Plus has
several bugs in the SCSI Manager in its ROM which is what is used
during boot - before any patches (fixes) can be read off of the
boot disk drive.  Because of these bugs, the Mac Pluses will
crash when loading SCSIMaster™ 1.1 off of the disk drive regardless
of whether there is a floppy in the floppy drive or not.  Crashing
during the booting process may also happen on other untested models
of the Macintosh especially the 68040 machines.

The solution is to disconnect the Mac from any SCSI disk drive that
has SCSIMaster™ installed on it.  Disconnecting all SCSI devices
will ensure that you can boot your Mac from the floppy drive.
After your Mac has booted, you must reconnect the SCSI
drive cable to your Mac SCSI bus while the Mac is still running.
Then make sure that the SCSI drive is powered up and running.
Then you can run SCSIMaster™ from the floppy and remove it from your
hard drive.  This is the only way that SCSIMaster™ can be removed
from a computer that crashes at boot time after installation.
Of course you can also reformat your hard drive instead, but that
is not likely to be a very popular prospect.  Note that if you
install SCSIMaster™ on an internal SCSI drive, it still must be
disconnected from the Mac's SCSI bus.  This means that if you
install SCSIMaster™ on your Mac's internal hard drive and it crashes
at boot time after installation then you must remove the cover
of your Macintosh and unplug the SCSI drive control cable so that
the Mac can be booted successfully from its floppy drive.  The
SCSI drive power cable does not need to be disconnected from the
internal drive, just the SCSI signal cable.  The power connecter
has 2 or probably 4 colored wires running to it.  The signal
cable is a wide, thin ribbon cable with 50 wires in it.  Disconnect
only the signal cable.  After booting from the floppy, make sure
to reconnect the signal cable before running the SCSIMaster™
installer/remover program.

Note that SCSIMaster™ can be easily removed at any time from any
Mac that does not crash at boot time.  Simply run the SCSIMaster™
install program and click on the REMOVE button.  The only time
that the SCSI bus must be disconnected from the Mac in order to
remove SCSIMaster™ is when the Mac crashes at boot time.