2 2 1 7 A V MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 2360| | |
Capacity form/unform 1700/ 2044 MB Heads 15| | |
Seek time / track 10.0/ 1.5 ms Sector/track | | |
Controller SCSI2 SI/FAST/AV Precompensation
Cache/Buffer 512 KB WRITE/PARITY Landing Zone
Data transfer rate 4.000 MB/S int Bytes/Sector 512
10.000 MB/S ext SYNC
Recording method RLL operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 50 | -40 65
Power: sleep W Humidity % 10 90 | 10 95
standby W Altitude km -0.061 3.048| -0.305 15.240
idle W Shock g 5 | 60
seek 12.2 W Rotation RPM 5400
read/write W Acoustic dBA 37
spin-up W ECC Bit 64
MTBF h 300000
Warranty Month
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
**********************************************************************
MICROPL. 2200AV SERIES DISK DRIVE INFORMATION 110499 REV. A
+---------------------------------------------------------+
| Single-Ended RN1+|XX
| ++J7 ++|||XX
| ++LED Connector J2||||XX
++ ++W4 ++++|XX
++ ++LED Option W2++|XX J1
|++ID2 W1|||XX
|+|ID1 SCSI ID ID0+-+ ++|XX
|++ID0 ID1| | W3++|XX
| ID2| | ++|XX
| PTY| | RN2+|XX
| WP | | ++ |||XX
| SP0| | |RESERVED |||XX
| SP1+-+ ++ ++| 1
| +W10 |
| ++ |
| +-------+ +W11 |XX J3
| +++++++++ ++ |XX Power
+---------------------------------------------------------+ 1
**********************************************************************
J U M P E R S
**********************************************************************
MICROPL. 2200AV SERIES DISK DRIVE INFORMATION 110499 REV A
Jumper Setting
==============
NOTE: There are two identiacal groups of address jumpers on the
Device Electronics Board; one group is near the LED, and the other
group is in line with SP0, SP1 WP, and PTY. USE EITHER GROUP FOR
ADDRESS SELECTION BUT - NOT - USE BOTH AT THE SAME TIME.
SCSI ID
-------
+----------+-----------------------+
| SCSI ID | Jumpers |
| | ID2 | ID1 | ID0 |
+----------+-------+-------+-------+
| 0 | OPEN | OPEN | OPEN |
+----------+-------+-------+-------+
| 1 | OPEN | OPEN | CLOSED|
+----------+-------+-------+-------+
| 2 | OPEN | CLOSED| OPEN |
+----------+-------+-------+-------+
| 3 | OPEN | CLOSED| CLOSED|
+----------+-------+-------+-------+
| 4 | CLOSED| OPEN | OPEN |
+----------+-------+-------+-------+
| 5 | CLOSED| OPEN | CLOSED|
+----------+-------+-------+-------+
| 6 | CLOSED| CLOSED| OPEN |
+----------+-------+-------+-------+
| 7 | CLOSED| CLOSED| CLOSED| (default)
+----------+-------+-------+-------+
Up to eigth devices (the host and seven targets) can be attached to
the SCSI Bus.
RN1/RN2 Interface Termination
------------------------------
Terminators INSTALLED at RN1 and RN2 (Default).
Drive provides termination for the interface lines.
Terminators at RN1 and RN2 omitted.
Drive does not provide termination for the interface lines.
SCSI terminators are installed only in the end devices on the SCSI
cable: remove the terminators from each of the other devices.
W1/W2/W3 Bus Termination Power Option
--------------------------------------
W1 CLOSED Drive provides local terminator power. (default)
W2 CLOSED Host system provides local terminator power.
W3 CLOSED Drive supplies +5V to J1 pin 26.
W3 OPEN Drive doesn't supply +5V to J1 pin 26. (default)
W10/W11 Spindle Sync Termination
---------------------------------
W10/W11 CLOSED Slave Sync (W10) and Master Sync (W11) are
terminated. (default)
OPEN Spindle Sync is not terminated.
Spindle Sync termination depends on system configuration; i.e. Master
Mode or Master Controller Mode.
SP0/SP1 Spindle Control Option
-------------------------------
SP0 CLOSED
SP1 OPEN Spindle motor starts when START UNIT command is
received.
SP0 OPEN Spindle motor starts at power-on. (default)
SP0/SP1 Spindle Delay Option
-----------------------------
SP1 CLOSED
SP0 OPEN Spindle start-up is delayed based on SCSI ID (12
seconds per ID).
SP1 OPEN Spindle start-up delay is disabled. (default)
WP Write Protect Option
------------------------
WP CLOSED Drive is write protected.
OPEN Drive is not write protected. (default)
PTY Bus Parity Check Option
----------------------------
CLOSED Drive neither generates nor detects parity.
OPEN Drive generates parity and has parity detection
enabled. (default)
J3 DC Power and pin connector assignments
-------------------------------------------
-------------------+
--+ +-----J3-----+| pin 1 +12 VDC
1| | 4 3 2 1 || pin 2 +12 Volts Return
-+ +------------+| pin 3 + 5 Volts Return
------------------+ pin 4 + 5 VDC
**********************************************************************
I N S T A L L
**********************************************************************
MICROPL. 2217/2210/2207/2205-D/S PRODUCT DESCRIPTION 135861 REV. A
Notes on Installation
=====================
Recommended mounting orientations
---------------------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
| +-----+ +-----+ |
+--+ +--+
The drives use industry-standard mounting for 3 -inch full-height
Winchester disk drives.
The drives are designed such that the outer frame should be hard-
mounted to th ehost equipment; no additional/external shock mounts
should be used.
Recommend orientation is vertical on either side, or horizontal with
the Device Electronics board down; other mounting orientations may be
used.
No matter what mounting orientation is used, Micropolis specifies
that the maximum HDA casting temperature not exceed 60*C (140*F).
If the HDA casting temperature measurement cannot be made, the
ambient air temperature around the drive must be kept at or below
50*C (122*F).
Caution:
The mounting screws must be selected so that they do not penetrate
the bottom mounting holes by more than 0.20 inches or the side mount-
ing holes by more than 0.156 inches.
Screws that are too long will short to PCBA components and/or prevent
proper operation of the shock mount system.
Mounting holes
--------------
3 per side and 4 on bottom #6-32 UNC-2B thru.
Multiple-Drive Systems
----------------------
Drive #1
+------HOST------+ +-----------------+
| +-----------+ +--+-SCSI-BUS-----+ J1 |
| |Terminators| | | +------+ J3 J4 |
| +-----------+ | | | +--------+--------+
| | | | +------------------+
+----------------+ | | Drive #2 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4 | |
| | +--------+--------+ |
| | +------------------o
| | Drive #3 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4 | |
| | +--------+--------+ |
| | +------------------o
| | Drive #4 |
| | +--------------+--+ |
+-------+------+ J1 |T | |
o------+ J3 J4 +--+ |
---DC-VOLTAGES-----+ +--------+--------+ |
---GROUND--------------------------o------------------+
T = TERMINATORS
Terminators are installed ONLY in the last physical drive in the
control chain.
Connection J4 is provided for grounding; system characteristics
determine the proper ground connection.
J1 Signal Connector
-------------------
Recommended Cable: 3M Scotchflex 3365/50 or equivalent
Mating connector: 3M P/N 3425-3000 or equivalent
J2 Spindle Synchronization connector
------------------------------------
Recommended mating connector: MOLEX 10-11-2043 or equivalent
Pins: MOLEX 08-50-0005
Suggested wire size: 22-24 AWG for all pins
J3 Power Connector
------------------
Recommended mating connector: AMP 1-480424-0 or equivalent
Pins: AMP 350078-4
Suggested wire size: 18 AWG (minimum) for all pins.
J4 Ground Connector
-------------------
3/16-inch spade lug J4 is provided for grounding. System character-
istics determine proper ground connection.
Recommended mating connector: AMP 60972-2 or equivalent
J7 Remote LED Connector
-----------------------
Recommended mating connector: Dupont 69305-002 or equivalent
Pins: Dupont 77138-001
Suggested wire size: 26-30 AWG for all pins
Differential Terminator
-----------------------
Suggested Terminator: Methode DM 103-01-0 or equivalent
SINGLE-ENDED Interface Electrical Characteristics
-------------------------------------------------
Interface control and status signals are digital (open collector TTL)
using industry-standard transmitters and receivers which provide
a terminated, single-ended system.
For active termination, the assigned signals are terminated with 110
ohms to +2.85V (nominal). For passive termination, the assigned
signals are terminated with 220 ohms to +5V (nominal) and 330 ohms to
ground. All signals use open-collector or three-state drivers.
Single-ended drivers and receivers allow a maximum cable length of
six meters (primarily for connection within a cabinet).
Signal transmission requires a single 50-conductor (flat or twisted
pair) cable. A characteristic impedance of 100 ( 10%) ohms is
recommended.
a. Input Characteristics
Each of the drive's signal receivers has the following
characteristics when measured at the interface connector.
1) Low-level input voltage (Signal true) = 0.0 VDC to 0.8 VDC
2) High-level input voltage (Signal false) = 2.0 VDC to 5.25 VDC
3) Low-level input current = -0.4 milliamps at 0.5 VDC
4) High-level input current = 0.1 milliamps at 2.7 VDC
5) Minimum input hysteresis = 0.2 VDC
6) Maximum input capacitance = 25 pF
b. Output Characteristics
Each of the drive's signal drivers has the following
characteristics when measured at the interface connector.
1) Low-level input coltage (Signal assertion) = 0.0 VDC to 0.5
VDC
2) High-level input voltage (Signal negation) = 2.5 VDC to 5.25
VDC
3) Minimum driver output capability = 48 milliamps (sinking) at
0.5 VDC.
c. Terminator Power (TERMPWR at Pin 26)
Terminator Power has the following requirements:
V(TERM) = 4.25 VDC to 5.25 VDC
800 milliamps minimum source drive capability, with 1.0 amp
recommended current limiting (e.g., a fuse).
1.0-milliamp maximum bus loading (except for the purposes of
providing power to an internal terminator).
The drive provides keyed connectors to prevent accidental grounding
or misconnection of terminator power.
DIFFERENTIAL Interface Electrical Characteristics
-------------------------------------------------
Differential interface signals consist of two signal lines which are
denoted +SIGNAL and -SIGNAL.
A signal is defined as true when the +SIGNAL is more positive than
the -SIGNAL.
A signal is defined as false when the -SIGNAL is more positive than
the +SIGNAL.
Differential drivers and receivers allow a maximum cable length of
25 meters.
Signal transmission requires a single 50-conductor cable. A
characteristic impedance of 100 ( 10%) ohms is recommended for un-
shielded flat or twisted pair ribbon cable.
A minimum conductor size of 28 AWG should be employed to minimize
noise effects and ensure proper distribution of optional terminator
power.
A stub length of no more than 0.2 meters is allowed off the main-line
interconnection within any connected equipment.
a. Input Characteristics
Each of the drive's signal receivers has the following
characteristics when measured at the interface connector.
I (input current on either input) = 2.0 milliamps, maximum
Note: These characteristics include both receivers and passive
drivers.
This requirement is met with the input voltage varying between
-7V and +12V, with power either on or off, and with hysteresis
equaling 35 millivolts, minimum.
b. Output Characteristics
Each driven signal has the following characteristics when
measured at the interface connector.
VOL (low-level output voltage) = 1.7V maximum at IOL
where IOL = 55 milliamps
VOH (high-level output voltage) = 2.7V maximum at IOH
where IOH = -55 milliamps
VOD (differential voltage) = 1.0V minimum, with common-mode
voltage ranges from -7 to +12
VOL and VOH are measured between the output terminal and the
SCSI device's logic ground reference.
c. Terminator Power (TERMPWR at Pins 25 and 26)
Terminator Power has the following requirements:
V(TERM) = 4.0 VDC to 5.25 VDC
600 milliamps minimum source drive capability, with 1.0 amp
recommended current limiting (e.g., a fuse).
1.0-milliamp maximum bus loading (except for the purposes of
providing power to an internal terminator).
The drive provides keyed connectors to prevent accidental
grounding or misconnection of terminator power.
Adjustments and Maintenance
---------------------------
The drives requires no adjustments or periodic maintenance;
additionally, no mechanical adjustments are required to prepare a
system for handling or shipment.
Field-Replacable Components
---------------------------
The concept of repair by replacement of complete functional
components is utilized in the drive, resulting in an MTTR of less
than 15 minutes.
Data Transfers
--------------
The drives are capable of transferring data up to 10 MBytes/sec in
synchronous mode and 5 MBytes/sec in asynchronous mode.
**********************************************************************
F E A T U R E S
**********************************************************************
MICROPL. 2217/2210/2207/2205-S/D PRODUCT DESCRIPTION 135861 REV. A
The single-ended and differential interface drive is compatible with
the "ANSI CCS" and "SCSI-2" versions of the industry-standard Small
Computer System Interface (SCSI) specification.
Media Defects
-------------
Media defects are physical characteristics of the media which result
in repetitive read errors when a functional drive is operated within
specified operating conditions.
At the time of manufacture, a media test system evaluates every
drive and identifies each media defect location. The defective
areas are identified by head address (HD), cylinder address (CYL),
and number of clocks from Index (CFI).
The list of manufacturer-found defects is stored on the drive in a
reserved, write-protected area accessible by the SCSI controller.
This list is known as the MDL (Manufacturers Defect List) or PList
(Primary Defect List).
A printed listing of the defects is also shipped with each drive. The
entries it contains can be mapped out (reassigned) automatically at
format control parameter bits.
Seek Time
---------
----------------------------------+--------+
Track-to-Track read msec. typ. | 1.5 |
write msec. typ. | 2.5 |
Average msec. typ. | 10 |
msec. max. | 25 |
Latency msec. avg. | 5.56 |
----------------------------------+--------+
Multi-Segment Read Ahead
------------------------
The Multi-Segment Read Ahead function partitions the 256K data buffer
into multiple buffers or segments.
The read-ahead function causes the drive to transfer the requested
block into its buffer and continue to read sequential blocks until
the buffer (or segment) is filled or another command is received.
On subsequent request data, the buffer will be checked for the
requested blocks. If the data already resides in the buffer, it will
be transferred to the host and no media access will be necessary.
This results in a significant improvement in performance.
Internal Data Rate
------------------
32 to 46 MHz
Sector Size = Variable; programmable up to 4096 bytes.
**********************************************************************
G E N E R A L
**********************************************************************
MICROPOL. AV LT
What is an AV Drive?
--------------------
Today's demanding digital video and audio applications require disk
drives to sustain a pre-determined minimum data transfer rate.
Any interruptions in this data rate are detrimental to AV
applications that require constant delivery of data at 30 frames per
second minimum. In standard drives utilized for data processing
requirements, the error correction and thermal calibration methods
employed are not optimized for continuous delivery of data. These
routine housekeeping tasks will procedure gaps in the data stream as
long as 850 ms, resulting in jumps, gaps, and stutters in motion and
sound when used in most AV applications.
(MICROPOLIS 10/96)
Installation Guide for IBM PC & Compatible
==========================================
Daisy Chain Option Kit
----------------------
The MICRODISK AV LT subsystem will normally be last SCSI device on
the daisy chain. However, if you wish to daisy chain your MICRODISK
AV LT subsystem to other SCSI devices, you will need one Daisy Chain
Option Kit. This kit includes one each of the following items:
- SCSI System Cable (right angle connector)
- Daisy Chain (DCO) SCSI Backplane Cable
- MHA Rear Cover
Two SCSI system cables are available. Both cables have a Centronics
50-pin connector at the MICRODISK AV LT end, and either a Centronics
50-pin or mini-SCSI connector at the other end.
NOTE
Connect the SCSI system cable's right angle connector to the back of
the module.
Using the Daisy Chain Option Kit
--------------------------------
The MICRODISK AV LT subsystem will normally be the last SCSI device
on the daisy chain. However, if you wish to daisy chain your MICRO-
DISK AV LT subsystem to other SCSI devices, you will need one Daisy
Chain Option Kit.
To allow your MICRODISK AV LT subsystem to daisy chain to other SCSI
devices, you will remove the SCSI Backplane Cable from a MICRODISK AV
LT module (usually the TOP module in the stack), and replace it with
a Daisy Chain SCSI Backplane Cable. You will then install the MHA
rear cover, and connect the rightangle connector end of the SCSI
system cable to the Daisy Chain SCSI Backplane Cable connector, and
the other end (50-pin Centronics connector) to another SCSI device
outside the MICRODISK AV LT subsystem.
Installation Guide for IBM PC & Compatible
==========================================
Cables/Cords
------------
MICRODISK AV LT SCSI cables and AC power cords are manufactured to
the industry standard for this type of application. MICRODISK AV LT
module interconnect cables and cords have specific design features to
maintain both aesthetics and uncompromising performance.
Failure of any single power cord or SCSI cable will not cause data to
be lost. Failure of a single cord or cable may sometimes cause all
disk drive access to cease, but should never cause data stored on a
MICRODISK AV LT drive to be lost.
Getting Started
---------------
There are several kits that may be shipped for assembly and installa-
tion of a MICRODISK AV LT subsystem. The minimum MICRODISK AV LT
subsystem requires at least:
- One MICRODISK AV LT Module Kit.
- One MICRODISK AV LT System Configuration Kit.
- One SCSI/Power Cable Kit.
- One SCSI host adapter.
Depending on the configuration you may also need:
- Additional SCSI host adapters.
- One or more MICRODISK AV LT Module Kit(s).
- One or Expansion Kit(s).
- One or more MICRODISK AV LT Multiple Host Adapter (MHA) Option
Kit(s) .
- One or more MICRODISK AV LT Daisy Chain Option Kit(s).
CAUTION
Do not twist cable or cord connectors during unpacking or assembly;
damage may occur.
MICRODISK AV LT Module Kit
--------------------------
A MICRODISK AV LT Module Kit includes one each of the following
items:
- MICRODISK AV LT Module
- Front Cover
- Rear Cover
- Hardware Registration Card
- Read First Document
To increase available storage capacity, modules may be assembled in a
"stack".
If you use more than nine modules in your MICRODISK AV LT subsystem,
new stacks should be created to accommodate the additional modules.
NOTE
The maximum recommended number of modules in each stack is nine.
Only seven SCSI devices can be connected to a single host adapter
If you have more than seven modules in your stack, you must install a
second host adapter and use a Multiple Host Adapter (MHA) Option Kit.
If you create more than one stack, you will need one Expansion Kit
and one SCSI/Power Cable Kit for each additional stack you create.
System Configuration Kit
------------------------
MICRODISK AV LT subsystems are assembled with the components included
in the MICRODISK AV LT System Configuration Kit, Module Kit(s), and
SCSI/Power Cable Kits. One System Configuration Kit is required per
MICRODISK AV LT subsystem.
The MICRODISK AV LT System Configuration Kit includes one each of the
following items:
- Top Cover
- SCSI Terminator
- Base Assembly (with Power Switch)
- Read First Document
- Assembly and Installation Guide.
SCSI/Power Cable Kit
--------------------
One SCSI/Power Cable Kit is needed per stack. There are six types of
cable kits to address the Centronics SCSI Connector (ISA) or mini-
SCSI Connector (EISA/MCA) and three types of AC Power Cords
available: U.S., U.K., or European:
- U.S. Standard SCSI/Power Cable Kit
- U.S. Mini-SCSI/Power Cable Kit
- U.K. Standard SCSI/Power Cable Kit
- U.K. Mini-SCSI/Power Cable Kit
- European Standard SCSI/Power Cable Kit
- European Mini-SCSI/Power Cable Kit
Each type of SCSI/Power Cable Kit includes one each of the following
items:
- SCSI System Cable (Centronics SCSI)
- AC Power Cord
Expansion Kit
-------------
One Expansion Kit is necessary for every new stack you create.
An Expansion Kit includes one each of the following items:
- Top Cover
- SCSI Terminator
- Base Assembly (with Power Switch)
Multiple Host Adapter Option Kit
--------------------------------
One MHA Option Kit, required for each additional host adapter used
in any single stack, includes one each of the following items:
- SCSI System Cable (right angle connector)
- MHA SCSI Backplane Cable
- SCSI Terminator
- MHA Rear Cover
Two SCSI system cables are available. Both cables have a Centronics
50-pin connector at the MICRODISK AV LT end, and either a Centronics
50-pin, mini-SCSI, or mini-SCSI connector at the host adapter end.
NOTE
Connect the SCSI system cable's right angle connector to the back of
the module.
Compatible SCSI Host Adapters
-----------------------------
Your computer needs at least one SCSI host adapter in order to
communicate with modules in a MICRODISK AV LT subsystem. If you need
a SCSI host adapter or have any questions, please contact your
dealer. The following is a table showing the recommended MICRODISK AV
LT compatible SCSI host adapters:
+----------------+--------------------------------------+
| | Architecture |
|Company | ISA | EISA | MCA |
+----------------+--------------+-------------+---------+
|ADAPTEC |AHA1540B/42B |AHA1740/42A* |AHA1640* |
| |AHA1540C/42C | | |
+----------------+--------------+-------------+---------+
|ALWAYS TECH. |IN2000* | | |
+----------------+--------------+-------------+---------+
|BUSTEK/BUSLOGIC |BT540/42 |BT740/42* | |
+----------------+--------------+-------------+---------+
|DPT |PM2011 |PM2012B/90 | |
| | |PM2012B/95 | |
+----------------+--------------+-------------+---------+
|DTC |DTC3180A/3280A|DTC3190 | |
| | |DTC3290 | |
+----------------+--------------+-------------+---------+
|FUTURE DOMAIN |TMC1660* | | |
| |TMC1670* | | |
| |TMC1680* | | |
+----------------+--------------+-------------+---------+
|MYLEX | |DCE376* | |
+----------------+--------------+-------------+---------+
|ULTRASTOR |ULTRA14F* |ULTRA24F* | |
+----------------+--------------+-------------+---------+
* These host adapters do not accept the standard 50-pin SCSI
connector cable. Please contact your reseller to obtain the
appropriate cable if you have one of these host adapters.
Host Adapter Considerations
---------------------------
- One MHA Option Kit is required for each additional host adapter you
add to an existing stack.
- When installing host adapters, ensure that there are no port
address or IRQ conflicts with other cards already installed or
planned for installation. Refer to your host adapter documentation
for specific details.
MICRODISK AV LT Assembly
------------------------
A MICRODISK AV LT subsystem may be as small as one module, or you can
add modules to increase storage capacity and create multiple stacks
if you so desire.
The minimum MICRODISK AV LT configuration requires on MICRODISK AV LT
Module Kit, one System Configuration Kit, one SCSI cable, one power
cord, and one SCSI host adapter.
Terminator
----------
The terminator must installed in the last module in the chain for
each SCSI bus (Host Adapter).
MICRODISK AV LT Series Disk Drives
----------------------------------
Each module in a MICRODISK AV LT subsystem contains a MICRODISK AV LT
Series disk drive. MICRODISK AV LT Series disk drives are engineered
specifically for multimediam high-end graphics, and digital audio/
video applications.
MICRODISK AV LT Series disk drives have the highest minimum sustained
data rate in the industry in their class at 3.0 MB/sec, and a maximum
sustained uninterrupted data rate of 2.9 MB/sec. Industry standard
high capacity data processing drives are not designed for high
sustained, uninterrupted data rates - factors which are required for
real-time recording and playback of digital audio/video data.
Standard drives perform short, random "burst" transfers, leaving gaps
in the data stream.
MICRODISK AV LT Formatting/Partitioning
---------------------------------------
Your MICRODISK AV LT subsystem modules need to be formatted and
partitioned before they can be used for data storage. To perform
these functions, use the disk formatting/partitioning utility
program(s) that you received as part of your operating system
software.
The utilities prepare your MICRODISK AV LT modules for use. Under
normal circumstances you will only need to format and partition each
MICRODISK AV LT module once.
NOTE
Because each module in a MICRODISK AV LT stack is a separate,
independent SCSI device, you must format and partition each MICRODISK
AV LT module separately.
Formatting the Hard Disk
------------------------
Formatting lays down distinct patterns on the disk which set up the
disk's organizational structure. You normally need to format the disk
only once.
Installing Partitions
---------------------
Partitioning prepares a hard disk for use by the PC. Partitions allow
you to divide the space available on the hard disk into separate
areas which appear on the desktop as separate logical disk drives
(volumes). This allows more flexible management of files (i.e., you
can use one partition for word processing, another for database work,
etc.).
Management of back-up also becomes easier with a wellorganized and
partitioned hard disk. A large hard disk with many small files takes
up a lot of disk space because of the way the filing system allocates
disk space. You can save space by partitioning the hard disk into
smaller volumes.
Carefully plan your partitions, as you cannot change partitions with-
out erasing your data. If you choose to alter the sizes or types of
partitions, you should:
1. Back up all your files
2. Make partitioning changes
3. Restore the files to their new volumes.
CAUTION
Remember, you can change partitions later, but all the information
stored on them will be lost. Make sure you have all data from these
partitions backed-up before changing the partitions.
It is not necessary to reformat the disk to redefine the partitions.
MICRODISK AV LT Operation
-------------------------
The MICRODISK AV LT subsystem MUST be turned on prior to, or at the
same time as, your computer.
The MICRODISK AV LT subsystem MUST be turned on whenever your
computer is on.