Hard Drive: MICROPOLIS: 1624-7 668MB 5.25"/HH SCSI2 FAST
1 6 2 4 - 7 MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/HH Cylinders 2099| | |
Capacity form/unform 668/ 765 MB Heads 7| | |
Seek time / track 16.0/ 2.5 ms Sector/track | | |
Controller SCSI2 SI/FAST Precompensation
Cache/Buffer 256 KB SEGMENTED 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 10 50 | -40 65
Power: sleep W Humidity % 10 90 | 10 90
standby 12.1 W Altitude km -0.061 3.048| -0.305 15.240
idle 13.8 W Shock g 2 | 50
seek W Rotation RPM 3600
read/write 14.0 W Acoustic dBA 41
spin-up W ECC Bit 64
MTBF h 150000
Warranty Month 60
Lift/Lock/Park YES Certificates
Layout
MICROPL. 1624 PRODUCT DESCRIPTION 110825 REV. A
+---------------------------------------------------------++-+
| W2++ || 20 J2
| ||++ || |
| COMPONENT SIDE W1++++W31 || | ID2
| || | ID1
| RN1-+ |1-2 ID0
| Interface | | |XX
| Terminator | | |XX
| | | |XX
| +--+ |XX
| |XX J1
| |XX
|W12 W13 |XX
|+----+ |XX
|+----+ LED | 1
| W8+--+ |XX J3
| +--+ |X1 Power
+---------------------------------------------------------+ (Solder
Side)
+--------------------------------------+
| ++J4 HDA |
| ++ ++J5 |
| ++ Frame|
| |
| J3 1|
| J2 1 J1 1 xxxxxxxx|
+..........-XXXXXXXXXXXXXXXXXX-xxxxxxxx+
+-Multi-+++---Signal------------Power--+
|||
||+--- SCSI ID0
|+---- SCSI ID1
+----- SCSI ID2
Jumpers
MICROPL. 1624 PRODUCT DESCRIPTION 110825 REV. A
Jumper setting
==============
x = Jumpers setting at factory
J2 SCSI ID ----------- +----------+-----------------------+ | SCSI ID | Jumpers | | | ID2 | ID1 | ID0 | +----------+-------+-------+-------+ |x 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| +----------+-------+-------+-------+
Up to eight devices (the host and seven targets) can be attached to
the SCSI bus. The 1624 disk drive has three ID jumpers. These three
jumpers are used to assign one of the eigth SCSI ID bits (0 through
7) to the drive.
In multiple-device systems, each drive must have its own unique ID
bit.
Interface Terminator pack RN1 provides proper termination for the
interface lines. For a multiple-drive system, the terminator pack is
installed in the last drive on the cable.
J2 Spindle Control Option
--------------------------
Pin 7-8 CLOSED The drive must wait for an interface START UNIT
command to start the spindle motor.
OPEN The drive automatically starts the spindle motor
at power-on. (Factory default configuration)
J2 Write Protect Option
------------------------
Pin 11-12 CLOSED The drive is write protected. CAUTION: The
drive can still be formatted.
OPEN The drive is not write protected. (Factory
default configuration)
J2 Bus Parity Check Option
---------------------------
Pin 13-14 CLOSED The drive neither generates nor detects parity.
OPEN The drive generates parity and enables parity
detection. (Factory default configuration)
J4/J5 Ground Connectors
------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding.
System characteristics determine proper ground connection.
W1/W2/W31 Bus Termination Power Option
---------------------------------------
+-----------------------+------------------------------------+ | Jumpers | | | W1 | W2 | W31 | | +-------+-------+-------+------------------------------------+ | CLOSED| OPEN | OPEN |The drive provides terminator power | | | | |to its on-board terminators | | | | |(Factory default configuration) | +-------+-------+-------+------------------------------------+ | OPEN | CLOSED| OPEN |Terminator power is provided by the | | | | |host via interface cable J1, pin 26 | +-------+-------+-------+------------------------------------+ | OPEN | CLOSED| CLOSED|The drive provides terminator power | | | | |to its on-board terminators and | | | | |also to the SCSI bus via interface | | | | |cable J1, pin 26 (TERMPWR) | +-------+-------+-------+------------------------------------+
A jumper is installed at W1, at W2, or at W2 and W31 to select the source of terminator power (+5V) for the SCSI bus terminator packs on the Device Electronics board.
Do not install jumpers at both W1 and W31.
W8/9 Spindle Synchronization Option
------------------------------------
The Rotational Position Locking field (MODE SELECT command, Page Code
04h) is used to specify spindle synchronization operation.
Unsynchronized: If the drive is set to Unsynchronized (RPL = 00b), it
ignores the SLAVE SYNC signal.
Slave: If the drive is set to Slave (RPL = 01b), it does not generate
the MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its
index to the SLAVE SYNC signal (J2, pin 20) supplied by an external
source.
Master: If the drive is set to Master (RPL = 10b), it generates the
SLAVE SYNC output signal (J2, pin 20) for use directly by the slave
drives.
Master Control: If the drive is set to Master Control (RPL = 11b), it
generates the MASTER SYNC signal (J2, pin 16). This output is used by
the controller to generate the SLAVE SYNC signal (J2, pin 20) for the
slaves.
W12/W13 LED Color Option
-------------------------
A jumper is installed at W12 or W13 to select the color of the LED.
W12 CLOSED The red LED is selected
W13 CLOSED The green LED is selected (Factory default)
W14 Frame Ground Option
------------------------
W14 CLOSED Frame ground is connected to logic ground
OPEN Frame ground is not connected to logic ground
(Factory default configuration)
Install
MICROPL. 1624 PRODUCT DESCRIPTION 110825 REV. A
Notes on installation
=====================
Drive mounting
--------------
horizontally vertically
+-----------------+ +--+ +--+ +------------------+
| | | +-----+ +-----+ | | | x
| | | | | | | | x+----------------+x
+-+-----------------+-+ | | | | | | ||x x||
+---------------------+ | | | | | | || x x ||
| | | | | | || x x ||
x x | | | | | | || x x ||
+------x------x-------+ | +-----+ +-----+ | || xx ||
+-+------x--x-------+-+ +--+ +--+ || x x ||
| xx | || x x ||
| x x | || x x ||
+---x--------x----+ |x x|
x x x++----------------++x
Dimensions and Mounting
-----------------------
The 1624 disk drive uses industry-standard mounting for 5 -inch
half-height Winchester disk drives.
Recommended orientation is vertical on either side, or horizontal
with the Device Electronics board down; other mounting orientations
may be used provided the ambient air temperature around the drive is
kept at or below 50*C (122*F).
Inasmuch as the drive frame acts as a heat sink to dissipate heat
from the unit, the enclosure and mounting structure should be
designed to allow natural convection of heat around the HDA and
frame. If the enclosure is small or natural convection is limited,
a fan may be required. In any case, no point on the HDA assembly
should exceed 62*C (143*F).
Mounting Screws
---------------
4 per side 6-32 UNC-2B x 0.10 deep (thru hole).
4 on bottom 6-32 UNC-2B x 0.22 deep
Caution: To avoid restricting HDA sway space, the mounting screws must not penetrate the side mounting holes by more than .10 (+.00, -.03) inch or the bottom mounting holes by more than .20 (+.00, -.03) inch.
Torque applied to the screws must not exceed 8 in-lbs.
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.
The assigned signals are terminated with 220 ohms to +5V (nominal) and 330 ohms to ground at each end of the cable. 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 cable. A
characteristic impedance of 100 ( 10%) ohms is recommended for un-
shielded flat or twisted-pair ribbon cable.
a. Input Characteristics
Each of the drive's signal receivers has the following
characteristics when measured at the interface connector.
1) Signal true = 0.0 VDC to 0.8 VDC
2) Maximum total input load = -0.4 milliamps at 0.5 VDC
3) Signal false = 2.0 VDC to 5.25 VDC
4) Minimum input hysteresis = 0.2 VDC
b. Output Characteristics
Each driven signal has the following characteristics when
measured at the interface connector.
1) Signal assertion = 0.0 VDC to 0.5 VDC
2) Minimum driver output capability = 48 milliamps (sinking) at
0.5 VDC.
3) Signal negation = 2.5 VDC to 5.25 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 1624 disk drive provides keyed connectors to prevent accidental
grounding or misconnection of terminator power.
Signal Connector J1
-------------------
J1 is a 50-pin connector. Signal interface connection is made via
this connector. The signals on J1 include the 8-bit SCSI bus and
various control and handshaking lines.
Recommended Cable: 3M Scotchflex 3365/50 or equivalent.
Mating connector: 3M P/N 3425-3000 or equivalent.
J2 Multi-Function Connector/Jumper Block
----------------------------------------
J2 is a 24-pin, multi-function connector/jumper block that is used
for drive address selection.
J3 DC Power Connector ---------------------- J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector on the Motor Control board. Both +5V and +12V are supplied to the drive via this connector.
Mating Connector: AMP 1-480424-0 or equivalent
Pins: AMP 350078-4
Suggested Wire Size: 18 AWG
Ground Connectors J4 and J5
---------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding. Systems
characteristics determine proper ground connection.
Mating connector: AMP 60972-2 or equivalent.
Multiple-Drive Systems
----------------------
Up to seven 1624 disk drives can be connected to a single host.
Drive #1
+------HOST------+ +-----------------+
| +-----------+ +--+-SCSI-BUS-----+ J1 |
| |Terminators| | | +------+ J3 J4/J5 |
| +-----------+ | | | +--------+--------+
| | | | +------------------+
+----------------+ | | Drive #2 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------o
| | Drive #3 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------o
| | Drive #4 |
| | +--------------+--+ |
+-------+------+ J1 |T | |
o------+ J3 J4/J5 +--+ |
--DC-Voltages------+ +--------+--------+ |
---GROUND--------------------------o------------------+
T = TERMINATORS
Terminators are installed ONLY in the last physical drive in the
control chain.
Connectors J4 and J5 are provided for grounding; system character-
istics determine the proper ground connection.
Adjustments and Maintenance
---------------------------
The 1624 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 1624, resulting in an MTTR of less
than 15 minutes.
Multi-Segment Data Buffer/Cache
-------------------------------
The 256K data buffer is dynamically divided into segments with each
segment holding data from different areas of the disk. This maximizes
the improvement of read-ahead technology by greatly increasing the
probability of a cache hit.
This feature improves the performance of all types of systems; from
single threaded DOS environments to complex architectures like UNIX
with its own system caches.
Features
MICROPL. 1624 PRODUCT DESCRIPTION 110825 REV. A
Micropolis 1624 (single-ended) high-performance, 5 -inch half-height
Winchester Disk Drives provide users with high-speed, random-access
storage. The drives are fully compatible with the industry standard
Small Computer System Interface (SCSI) and are designed to meet the
needs of diverse applications environments.
Some Features of the Drive
--------------------------
Programmable sector sizes from 180 to 4096 bytes in 1-byte in-
crements.
Automatic error recovery.
Performance is enhanced by low SCSI command overhead and intelligent
features such as read-ahead and sophisticated buffer management.
SCSI-2 Tagged Command Queuing greatly increases performance by
allowing the drive to optimize the execution sequence of command
strings (from single or multiple initiation).
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 bytes from Index (BFI). A pronted listing of the
defects is also shipped with each drive.
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).
The entries it contains can be mapped out (reassigned) automatically
during the operation by appropriate use of the format control para-
meter bits.
Seek Time
---------
| 1624 |
----------------------------------+--------+
Adjacent Track msec. | 2.5 |
Average msec. | 16 |
Full Stroke msec. | 30 |
One-Third Stroke msec. max. | 16.5 |
Latency msec. avg. | 8.33 |
----------------------------------+--------+
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