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Short: V1.3, Amiga Magneto-Optical Drive FAQ
Author: mark_k@iname.com
Uploader: mark_k@iname.com
Type: docs/help
Amiga Magneto-Optical (MO) Drive FAQ 1.3 (25-Mar-99)
Copyright © 1998-1999 by Mark Knibbs
Changes since version 1.2
-------------------------
1.3 25-Mar-99, fourth public release
· Added patch information for HDToolBox versions 2.2, 2.22 and 40.3.
· Added to the List of Amiga MO Users section.
· Updated Olympus information and URL. Olympus now make their own 640MB
external 3½" drive.
· Added Free Mac SCSI Software, Low-Level Formatting, Notes on This
AmigaGuide Document, Pictures of MO Drives and Disks and Setting the Device
Type sections.
· Added pointer to the MO Disk Icons package.
· Highlighted all URLs and email addresses.
· Mention that ShapeShifter's SCSI support is buggy.
· Added questions about "MO-MIGA" software and PCMCIA MO drives to the
Information Wanted section.
· Changed format of Version History section.
· Added "NEW" next to new section names on front page.
· Split What are Magneto-Optical Drives? section into two parts.
· Added URLs for Fujitsu MCB3064/MCC3064 SCSI and ATAPI Product Manuals to For
Programmers section.
· Updated media costs table; I found a source of cheap direct overwrite MO
disks.
· Added prime factorisations for numbers of sectors per disk to Mounting and
Using the Drive and Disks section.
· Added to the List of Amiga MO Users section.
· Added SFS mount files, and reorganised mount files in DOSDrivers drawer
into subdirectories.
· Added FFS & SFS mount files for 600MB 5¼" disks.
· Replaced instances of 3.5" with 3½" and 5.25" with 5¼".
· Mention that an HTML version of the MO FAQ is on my web page.
· Various other changes.
Here are some extracts from the FAQ.
Introduction
------------
The Amiga Magneto-Optical Drive FAQ contains information about using magneto-
optical (MO) disk drives with the Amiga. It is freely distributable.
I hope the availability of this document will encourage more Amiga users to
consider optical storage, instead of fragile magnetic media like Zip, Jaz and
SyQuest.
What are Magneto-Optical Disk Drives?
-------------------------------------
Magneto-optical ("MO") disk drives are versatile removable storage devices,
which use very robust and inexpensive media. You can use an MO disk just like a
large floppy disk, or like a hard disk.
Sony's increasing popular "MiniDisc" system uses a type of magneto-optical
disk.
Magneto-Optical storage has many advantages over other types of removable media:
· Media life is at least 30 years, which greatly exceeds the life of magnetic
media like floppy disks, Zip and Jaz disks. Some manufacturers quote media
life of 50 or even 100 years. Data can be rewritten at least a million
times, and read at least 10 million times; some manufacturers quote figures
ten times this. This figure also exceeds that for magnetic media.
· There is no physical contact between disk surface and drive head, so there
is no possibility of data loss through a head crash.
· MO drives are backwardly compatible, which means that if you upgrade your
drive in the future, you will be able to read and write all your existing
disks on the new drive.
· MO disks are not susceptible to magnetic fields.
· If, for example, you spill a cup of coffee on an MO disk, you can clean the
disk surface and continue to use the disk. Cleaning kits are available for
both MO drives and disks. Disk cleaning kits are very cheap.
· MO disks are simple in construction, unlike some other kinds of removable
media which may contain moving parts. This is another reason why MO offers
greater reliability than magnetic media.
· MO disks are available in several different capacities, which vary in
price. Cost per megabyte is lower than all other kinds of random access
removable media.
· Unlike Zip, Jaz, SyQuest etc., MO drives and disks are not proprietary, and
they are made by many companies. The disks are covered by various
international standards. So you will not be stuck if your drive
manufacturer goes bust, as happened recently to SyQuest.
· Compared to other forms of optical storage, there are no restrictions on
writing and rewriting data to MO disks, unlike CD-R or CD-RW. Also unlike
CD-R & CD-RW, since the disk itself is protected by a plastic casing, there
is no danger of data corruption due to the disk getting scratched.
· MO drives normally automatically verify written data to guarantee data
integrity. There is no such verification with CD-R and CD-RW, so to be
assured that the data has been written properly when using these, you would
need to manually compare all copied files.
· Magneto-optical technology is well-proven. I believe the first 128MB 3½" MO
drives were available in 1992. 640MB drives have been available since 1996.
Originally MO was largely restricted to professional use due to high drive
cost, but over the past couple of years this situation has changed.
· MO disks are convenient, compact and easy to use. 3½" MO disks are the same
size as two floppy disks stacked on top of each other. They have a
write-protect tab which works just like a floppy disk's.
============================= Archive contents =============================
Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
628 273 56.5% 25-Mar-99 18:34:38 Amiga MO FAQ.info
100134 34586 65.4% 25-Mar-99 17:06:00 +Amiga_MO_FAQ.guide
287 200 30.3% 25-Mar-99 17:59:04 +Amiga_MO_FAQ.guide.info
5426 2447 54.9% 25-Mar-99 17:08:22 +Amiga_MO_FAQ.readme
276 188 31.8% 25-Mar-99 17:59:08 +Amiga_MO_FAQ.readme.info
628 269 57.1% 21-Mar-99 18:46:28 +DOSDrivers.info
628 268 57.3% 18-Feb-99 17:45:32 +BSD.info
981 560 42.9% 21-Mar-99 18:38:40 +BSD230
529 305 42.3% 18-Feb-99 17:44:36 +BSD230.info
983 559 43.1% 21-Mar-99 18:38:54 +BSD540
529 304 42.5% 18-Feb-99 17:44:36 +BSD540.info
628 273 56.5% 21-Mar-99 18:47:26 +FFS.info
806 456 43.4% 21-Mar-99 18:33:08 +MO128
529 303 42.7% 21-Mar-99 18:47:26 +MO128.info
806 457 43.3% 21-Mar-99 18:33:26 +MO230
529 303 42.7% 21-Mar-99 18:47:26 +MO230.info
808 458 43.3% 21-Mar-99 18:33:50 +MO540
529 306 42.1% 21-Mar-99 18:47:26 +MO540.info
829 472 43.0% 21-Mar-99 18:36:50 +MO600
529 305 42.3% 21-Mar-99 18:47:26 +MO600.info
829 468 43.5% 21-Mar-99 18:32:04 +MO640
529 305 42.3% 21-Mar-99 18:47:26 +MO640.info
628 271 56.8% 21-Mar-99 18:49:02 +Mac.info
780 432 44.6% 21-Mar-99 18:41:32 +MAC230
529 299 43.4% 21-Mar-99 18:49:02 +MAC230.info
782 433 44.6% 21-Mar-99 18:41:58 +MAC540
529 305 42.3% 21-Mar-99 18:49:02 +MAC540.info
798 446 44.1% 21-Mar-99 18:42:10 +MAC640
529 304 42.5% 21-Mar-99 18:49:02 +MAC640.info
1354 741 45.2% 28-Nov-98 23:03:12 +MAC640A
529 304 42.5% 21-Mar-99 18:49:02 +MAC640A.info
628 265 57.8% 18-Feb-99 17:45:20 +PC.info
1576 760 51.7% 28-Nov-98 23:05:02 +MOC
529 306 42.1% 18-Feb-99 17:44:02 +MOC.info
991 550 44.5% 21-Mar-99 18:39:22 +PC128
529 302 42.9% 18-Feb-99 17:44:02 +PC128.info
977 544 44.3% 21-Mar-99 18:39:38 +PC230
529 302 42.9% 18-Feb-99 17:44:02 +PC230.info
979 542 44.6% 21-Mar-99 18:40:06 +PC540
529 307 41.9% 18-Feb-99 17:44:02 +PC540.info
814 454 44.2% 21-Mar-99 18:42:40 +SF128
529 301 43.1% 18-Feb-99 17:44:02 +SF128.info
814 454 44.2% 21-Mar-99 18:42:44 +SF230
529 303 42.7% 18-Feb-99 17:44:02 +SF230.info
816 456 44.1% 21-Mar-99 18:42:50 +SF540
529 303 42.7% 18-Feb-99 17:44:02 +SF540.info
817 455 44.3% 21-Mar-99 18:42:56 +SF640
529 305 42.3% 18-Feb-99 17:44:02 +SF640.info
628 267 5