M 8 0 5 1 A P 4 MINISCRIBE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 745| 981| |
Capacity form/unform 41/ 51 MB Heads 4| 5| |
Seek time / track 28.0/ 8.0 ms Sector/track 28| 17| |
Controller IDE / AT Precompensation
Cache/Buffer 32 KB Landing Zone
Data transfer rate 1.000 MB/S int Bytes/Sector 512
4.000 MB/S ext
Recording method RLL 2/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 4 50 | -40 65
Power: sleep W Humidity % 8 80 | 8 80
standby W Altitude km -0.061 3.048| 12.192
idle 8.0 W Shock g 10 | 80
seek W Rotation RPM 3484
read/write W Acoustic dBA 45
spin-up W ECC Bit
MTBF h 150000
Warranty Month
Lift/Lock/Park YES Certificates CSA,TUV
**********************************************************************
L A Y O U T
**********************************************************************
MINISC. 8051A PRODUCT MANUAL NO. 1136 REV. D 04/02/90
+---------------------------------------------------------+
| 1++++++J4 |XX
| 2++++++ |XX
| |XX J1
| JP1+++|XX
| ++++|XX
| JP2|XX
| |XX
| |XX
| |XX
| |XX
| |XX
| |XX
| |XX
| |
| |XX Power
| |XX J3
+---------------------------------------------------------+
MiniScribe AT Interface Board
+---------------------------------------------------------+
| LED1xxx 39------------------------1 |
| + |::::::::::::::::::::::::| |
| 40------------------------2 |
| +++++++ J1 |
| +++++++ |
| JP1-----JP6 |
| |
| |
| |
| |
| |
| |
| |
| P2C P1A |
+--+ +-+ +----+
++++++++++++++++++ +++++++++++++++++++++++-++++++++
18 1 31 1
**********************************************************************
J U M P E R S
**********************************************************************
MINISC. 8051A PRODUCT MANUAL NO. 1136 REV. D, 04/02/90
Jumper Setting
==============
Dual Drive Support
------------------
Two drives may be accessed via a common interface cable, using the
same range of I/O addresses. The drives are jumpered as drive 0 or 1,
and are selected by the drive select bit in the Drive/Head register
of the task file.
All Task File registers are written in parallel to both drives. The
interface processor on each drive decides whether a command written
should be executed, depending on the type of command and which drive
is selected. The drive not selected does not execute the command and
does not activate the data bus in response to host I/O reads.
A master/slave relationship exists between the two drives: drive 0 is
the master, and drive 1 the slave.
In response to the Execute Diagnostics command, both drives execute
diagnostics; the slave reports its status to the master via the
-PDIAG line. The master then combines the slave's status with its own
before reporting status to the host.
Mode Jumpers
------------
Jumpering J4.1 to J4.2 causes the 8051A to operate in the slave role.
Remove this jumper when the drive is to function as the master, or is
the only drive attached.
To emulate 2:1 interleave timing, jumper J4.3 to J4.4. This allows
compatibility with some BIOS versions which cannot support 1:1 inter-
leave transfers. For normal operation, remove this jumper.
In a two drive system, jumper J4.5 to J4.6 when the drive is
operating as the master. The jumper is not installed on a slave or
single drive.
Jumper J4.7 to J4.8 is not used, and should be not installed.
Jumpering J4.9 to J4.10 enabled the I/O Channel Ready signal onto the
interface connector, pin 27.
NOTE
The 0851A may be shipped with a jumper between J4.1 and J4.3. This
jumper has no effect, but merely provides a spare for use as
described above.
Interface Board Jumper Configuration Table
------------------------------------------
JP1 Address Select REMOVED - (Default) Normal Operation
INSTALLED - Secondary address 170 through
177,376 through 377 decoded (for systems having
this capability)
JP2 I/O Channel INSTALLED - (Default) Gates I/O Channel Ready to
Ready the system bus.
JP3 REMOVED - (Default) Normal operation
JP4 INSTALLED - (Default) Normal operation
JP5 REMOVED - (Default) Normal operation
JP6 Active INSTALLED - (Default) Normal operation
Enables activity LED on interface board.
REMOVED - Disables interface board activity
LED.
**********************************************************************
I N S T A L L
**********************************************************************
MINISC. 8051A PRODUCT MANUAL NO. 1136 REV. D, 04/02/90
Notes On Installation
=====================
Recommended Mounting Configuration
----------------------------------
The MiniScribe 8051A quarter size drive design allows greater shock
tolerance than that afforded by larger, heavier drives.
To take full advantage of the shock mounts, provide a minimum 0.1"
clearance on both the top and sides of the drive. This clearance
allows for drive movement during acceleration.
The drive may be mounted in any attiude.
Mount the drive using size 6-32 screws with 1/8" maximum penetration.
Allow adequate ventilation to the drive to ensure reliable drive
operation over the operating temperature range.
Ground Terminal
---------------
A Ground Terminal is provided in one of these locations. Attach
ground wire (if provided with system) to the ground terminal during
installation of the drive.
Power Connector
---------------
Power is applied through J3, a 4 pin AMP connector. The recommended
mating connector is AMP P/N 1-480424-0, using pins AMP P/N 350078-4.
/------------\ P3-1 = +12 Volts DC
| 4 3 2 1 | P3-2 = +12 Volts Ground Return
+------------+ P3-3 = + 5 Volts Ground Return
P3-4 = + 5 Volts DC
Interface Connector
-------------------
The integrated drive interfaces to the host computer via a 40
position ribbon cable connector.
**********************************************************************
F E A T U R E S
**********************************************************************
MINISC. 8051A PRODUCT MANUAL NO. 1136 REV. D, 04/02/90
Introduction
------------
The MiniScribe 8051A disk drive is a 41 megabyte (formatted),
half-height 3.5" random access storage device with an integrated AT
controller.
Proven microprocessor spin control and voice coil actuator ensure
high performance and reliability. Superior mechanical construction
and a sophisticated integrated PCB contribute to maintenance-free
operation throughout the life of the device.
A sealed enclosure houses heads, disks and actuator assemblies. The
enclosure contains recirculating and breather-type filters which can
supply clean air to the head and disk environment.
The drive interfaces to an 80286 or 80386 AT-type system via the
system's onboard 40 pin AT connector, or through a MiniScribe AT
interface board.
Auto Park and Head Lock
-----------------------
Immediately following power down, dynamic braking of the spinning
disks delays momentarily. This allows time for the heads to move into
the landing zone - a safe area, away from stored data.
The head actuator assembly then mechanically latches into position,
and the disks spin down.
Disk Caching
------------
A disk cache involves the temporary storage of information from the
hard disk to the faster 32K RAM.
Subsequent host requests for the same information are met more
quickly by cache memory than by repeated, direct accesses to the hard
disk.
Cache "hits" refer to information requests satisfied from cache
memory. As cache memory accesses increase, system performance
improves.
Drive Mechanism
---------------
A brushless DC direct drive motor rotates the spindle at 3484 RPM.
The dynamically balanced motor/spindle assembly ensures minimal
mechanical runout to the disks. A dynamic brake provides a fast stop
to the spindle motor upon power removal.
Air Filtration System
---------------------
Over the life of the drive, a 0.3 micron filter and breather filter
(located within the sealed enclosure) maintain a clean, above-
atmospheric pressure environment to the heads and disks.
MiniScribe AT Interface Boards
------------------------------
To use the 8051A with an AT system that does not incorporate address
decoding or buffering on its motherboard, you must use a MiniScribe
AT interface oard. (Otherwise, simply interface via the system's on-
board 40 pin AT connector.
MiniScribe AT interface boards serve two primary functions:
1. Buffer signals between host and drive
2. Provide address decoding for the drive.
**********************************************************************
G E N E R A L
**********************************************************************
MAXTOR IDE INSTALLATION
INSTALLATION PROCEDURE FOR AN IDE DRIVE
---------------------------------------
1. Install a 40 pin Data Cable ensuring that pin 1, which can be
identified by the striped edge of the cable, is closest to the
power connector on the drive.
2. Install a DC power cable to the back of the drive.
3. Verify the jumper configurations for Master/Slave operation
(Note: Master will be the bootable drive. The slave will not
be bootable.) Also make sure the existing C: drive is jumped
to be the Master in a two drive system, not the only drive in
the system.
4. Apply power to the computer.
4a. When memory test is complete go into your system's Standard
CMOS set-up.
(Note: There are various ways to get into CMOS set-up, please
refer to system's manual for instructions.)
4b. If your system's BIOS supports a user programmable drive
type, program the BIOS with the default parameters of your
drive. If your system does not support a user programmable
drive type choose parameters that closely match but do not
exceed the drives MegaByte capacity. Escape from set-up
then choose write to CMOS and exit.
5. Boot from a DOS diskette that has FDISK.EXE and FORMAT.COM on
it. At the A> prompt type in FDISK. At the menu options select
option 1 to create a DOS partition. Another menu will appear
and from those options choose 1 to create a Primary DOS
partition. Select yes to make 1 large partition and it will
automatically become active. Then escape from FDISK.
6. At the A> prompt type in FORMAT C:/S This does a high-level
format on the drive and transfers the system files in order for
the drive to be bootable. (Note: IDE drives are low-level
formatted from the manufacturer and only need a high-level
format).
To configure the drive as a slave drive repeat steps 1-4 and
proceed with steps 5a. and 6a. as follows:
5a. At the C> prompt type in FDISK. When the menu options appear
select option 5 to switch to the second drive. Enter fixed
disk drive number 2. Then choose option 1 to create a DOS
partition, then select option 1 again to create a Primary DOS
partition or option 2 to create an Extended DOS partition.
(Note: C and D drives will always be the Primary partitions
but only the Primary partition on C: will have a status of
active).
6a. Proceed with a high-level format on the drive by typing FORMAT
D: (Note: Make sure the correct drive letter has been selected
for format).
7. The drive is now bootable. As a test remove the DOS diskette
from A and press reset to reboot the computer, a C> should be
displayed, the drive is now ready for operation.
