Hard Drive: QUANTUM: Q-520 18MB 5.25"/FH MFM ST506
Q - 5 2 0 QUANTUM
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 512| | |
Capacity form/unform 18/ 21 MB Heads 4| | |
Seek time / track 45.0/10.0 ms Sector/track 17| | |
Controller MFM / ST506 Precompensation 256
Cache/Buffer KB Landing Zone 511
Data transfer rate 0.625 MB/S int Bytes/Sector 512
0.625 MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 10 50 | -40 62
Power: sleep W Humidity % 20 80 | 10 95
standby W Altitude km 3.048| -0.305 9.144
idle W Shock g 5 | 30
seek W Rotation RPM 3529
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 10000
Warranty Month 12
Lift/Lock/Park YES Certificates CSA,UL1950
Layout
QUANTUM Q500 PRODUCT DESCRIPTION OEM MANUAL 81-50125 REV. E DEC. 83
+---------------------------------------------------------+ | |XX | |XX J2 | |XX | |XX | +-+ | | Drive | | | |+-+ Select | | | || | 1-+ |XX || |P4 +--RN3---+ |XX || | +--------+ |XX J1 || | Terminator |XX |+-+ |XX | |XX | +--E4 |X1 | +--+ | | +---------P5 |XX P3 | +---------+ |XX Power +---------------------------------------------------------+
Jumpers
QUANTUM Q500 PRODUCT DESCRIPTION OEM MANUAL 81-50125 REV. E, DEC. 83
Jumper Setting
==============
Drive Select
------------
Five jumpers are provided for logical drive number assignment. DS1,
DS2, DS3, DS4 cause the drive to be selected when the active drive
select line matches the installed jumper. Jumper G, when installed,
causes the drive to be selected constantly. The Quantum part number
for the jumper plug is 22-10036.
+-------+----------------------------+ |Drive | Jumper | |Select | 1 2 3 4 | +-------+-------+------+------+------+ | 1 | CLOSED|OPEN |OPEN |OPEN | +-------+-------+------+------+------+ | 2 | OPEN |CLOSED|OPEN |OPEN | +-------+-------+------+------+------+ | 3 | OPEN |OPEN |CLOSED|OPEN | +-------+-------+------+------+------+ | 4 | OPEN |OPEN |OPEN |CLOSED| +-------+-------+------+------+------+
Control Cable Termination
-------------------------
If the Model Q500 is the last drive at the end of the control signal
cable, a 220/330 ohm terminator pack must be installed at PCB
location RN3. The terminator must be removed from RN3 is the drive is
not at the end of a string of drives. The Quantum part number for the
terminator pack is 13-12302.
Install
QUANTUM Q500 PRODUCT DESCRIPTION OEM MANUAL 81-50125 REV. E, DEC. 83
Notes on Installation
=====================
Space Requirements
------------------
The Model Q500 is shipped with a face plate installed and shock
mounts directly mounted to base casting.
Mounting
--------
The Model Q500 drive may be mounted in any orientation and has two
mounting brackets with integral shock mounts for this purpose.
CAUTION
The base casting is very close to the drive mounting bracket.
Mounting screws lengths must be chosen so that no more than .130" of
the screw is available to enter the mounting bracket holes. This
length will allow full use of the mounting hole threads and avoid
damaging or placing unwanted stress on the base casting. To avoid
stripping the mounting hole threads the maximum torque applied to the
mounting screws must not exceed 8 inch/pounds.
Mounting holes: 6-32 UNC, 4 on the bottom and 2 on each side.
DC Power Connector
------------------
DC power connector (P3) is a 4 pin AMP Mate-N-Lok connector P/N
350211-1 mounted on the solder side of the PCB. The recommended
mating connector (J3) is AMP P/N 1-408424-0 utilizing AMP pins P/N
350078-4 (strip) or P/N 61173-4 (loose piece). J3 pins are labeled on
J3 connector.
+--------------+
|+-----J3-----+| pin 1 +12 Volts
|| 4 3 2 1 || pin 2 +12 Volts Return
|+------------+| pin 3 + 5 Volts Return
+--------------+ pin 4 + 5 Volts
Interface Connectors
--------------------
Two interface cable connections are required by the Model Q500, a
control cable (J1) and a signal or data cable (J2).
Connection to J1 is through a 34 pin pronted circuit board (PCB) edge
connector. The pins are numbered 1 through 34 with the even pins
located on the component side of the PCB and odd pins located on the
solder side of the PCB. Pin 2 is located on the end of the PCB
connector closest to the DC connector and is labeled. A key slot is
provided between pins 4 and 6. The recommended mating connector for
P1 is AMP ribbon connector P/N 88373-3.
Connection to J2 is through a 20 pin PCB edge connector. The pins are
numbered 1 through 20 with the even pins located on the component
side of the PCB. The recommended mating connector for P2 is AMP
ribbon connector P/N 88373-6. A key slot is provided between pins 4
and 6.
Ventilation
-----------
The Model Q500 operates without a cooling fan provided the ambient
air temperature does not exceed 122*F (50*C). Any user designed
cabinet should provide adequate air circulation so that this maximum
air temperature is not exceeded.
Introduction
------------
The Model Q500 has two interface connectors: one for control signals
which are TTL in nature and one for data transfer signals which are
differential in nature.
The control signals are both input, those originating external to the
drive and output, those originating within the drive. The control
signals could also be divided into two types: those intended to be
multiplexed in a multi-drive system and those intended to do the
multiplexing. The control signals that do the multiplexing are DRIVE
SELECT 1, DRIVE SELECT 2, DRIVE SELECT 3, and DRIVE SELECT 4 which
are input signals. The multiplexed signals are: STEP, DIRECTION,
HEAD SELECT and WRITE GATE input signals, TRACK 000, INDEX, READY,
WRITE FAULT and SEEK COMPLETE output signals. Up to four drives may
be connected in a daisy-chain configuration using a single control
signal cable. The last drive in the chain requires the terminator to
be installed at PCB location RN3. The maximum recommended cable
length is 20 feet (6m).
The input lines have the following electrical specifications:
Logic "0" = True = 0.0 VDC to 0.4 VDC at I in = -40MA (MAX) = LO
Logic "1" = False = 2.5 VDC to 5.25 VDC at I in = 250 uA (OPEN
COLLECTOR) = HI
The output lines are driven with a TTL open collector output stage
capable of sinking a maximum of 40 MA at the logic "0" or TRUE state
with a maximum voltage of 0.4 VDC measured at the driver. When the
line driver is in the logic "1" or FALSE state driver transistor is
off and the collector cutoff current is 250 microamperes.
Features
QUANTUM Q500 PRODUCT DESCRIPTION OEM MANUAL 81-50125 REV. E, DEC. 83
General Description
===================
Quantum Model Q500 Disk Drive is a random access storage device
using two, three, or four non-removable 5 " rigid disk platters as
storage media.
- Storage capacity of 20, 30, 40 megabytes
- Winchester design reliability
- Same physical size and mounting as ST412 drives
- Airlock (TM) Proprietary Automatic Actuator Lock
- Propritary, high resolution, quiet, rotary head position actuator
- 5.00 Mbits/second transfer rate
- Microprocessor controlled positioner, using an embedded wedge servo
- Uses the same DC voltages and currents as ST412 drives
Seek Time
---------
+----------------------------------+--------+
| | Q500 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 10 |
+----------------------------------+--------+
|Average msec. typ. | 45 |
| msec. max. | 49 |
+----------------------------------+--------+
|Full Stroke msec. typ. | 80 |
| msec. max. | 90 |
+----------------------------------+--------+
|Latency msec. avg. | 8.5 |
+----------------------------------+--------+
Media Quality Criteria
----------------------
Each drive that Quantum ships will meet or exceed the following
standards of media quality:
1. Cylinder zero (0) will be free of defect areas.
2. No surface will have more than 10 defect areas.
3. No surface will have more than 4 tracks with mutiple defect areas.
4. No drive will have more than 1 error per megabyte of unformatted
storage capacity.
Quantum defines a defect area as an area equal to or less than 16
bits in length. Hence a defcet area 17 bits in length counts as 2
defect areas and a defect area of 16 bits in length counts as 1
defect area.
Quantum uses a unique analog media test system which measures both
the amplitude and phase disortion of each bit that can be recorded on
all tracks of all surfaces. The test system provides a defect map
which is shipped with each drive. The defect location is identified
on the map by cylinder number, head number, number of bytes from
index, and number of bits in length. The numbers are given in both
decimal and hexadecimal notation for user convenience.
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