1 6 7 4 MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/HH Cylinders 1245| | |
Capacity form/unform 158/ 182 MB Heads 7| | |
Seek time / track 16.0/ 4.0 ms Sector/track 36| | |
Controller SCSI1 SINGLE-ENDED Precompensation
Cache/Buffer 64 KB LOOK-AHEAD Landing Zone
Data transfer rate 1.250 MB/S int Bytes/Sector 512
4.000 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 13.6 W Altitude km -0.061 3.048| -0.305 15.240
idle 13.6 W Shock g 2 | 50
seek W Rotation RPM 3600
read/write 14.8 W Acoustic dBA 43
spin-up W ECC Bit 48
MTBF h 50000
Warranty Month
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
**********************************************************************
MICROPL. 1670 SERIES PRODUCT DESCRIPTION 106179 REV. B
+---------------------------------------------------------+
| |+-+ J2
| ||X|
| COMPONENT SIDE || | ID2
| || | ID1
| |+-1 ID0
| |XX
| 1-+ W1++ |XX J1
| RN9 | | ++ |XX
| Terminator| | W2++ |XX
| | | || |XX
| +-+ +1 |XX
| |XX
| |X1
| (Spare) W14 +-+ |
| W3 | | |XX Power
| W9 +-+ |XX J3
+---------------------------------------------------------+ 1
+--------------------------------------+
| ++J4 ++J5 |
| ++ ++ |
| |
| |
| J3 |
| J2 J1 xxxxxxxx|
+..........-XXXXXXXXXXXXXXXXXX-xxxxxxxx+
+---------1------------------1--------1+
Power
**********************************************************************
J U M P E R S
**********************************************************************
MICROPL. 1670 SERIES PRODUCT DESCRIPTION 106179 REV. B
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 1670 Series 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.
J2 Multi-Function Connector/Jumper Block
-----------------------------------------
J2 is a 24-pin, multi-function connector/jumper block that is used
for connecting the drive to a user-supplied Operator panel.
J2 Pin 19 Logic ground
20 Not used
21 Write Protect Input. Logic Ground disables writing and
lights the Write Protect LED
22 Ready output. Logic ground indicates the drive is Ready
and lights the Ready LED
23 +5V source for the LEDs.
J4/J5 Ground Connectors
------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding.
System characteristics determine proper ground connection.
W1/W2 Bus Termination Power Option
-----------------------------------
+---------------+------------------------------------+
| Jumpers| |
| W1 | W2 | |
+-------+-------+------------------------------------+
| CLOSED| OPEN |The drive provides terminator power |
| | |to its on-board terminators |
| | |(Factory default configuration) |
+-------+-------+------------------------------------+
| OPEN | CLOSED|Terminator power is provided by the |
| | |host via interface cable J1, pin 26 |
+-------+-------+------------------------------------+
A jumper is installed at W1 or W2 to select the source of terminator
power (+5V) for the terminator packs on the Device Electronics board.
W3 Spindle Control Option
---------------------------
CLOSED The drive must wait for a START UNIT command to start the
spindle motor.
OPEN The drive automatically starts the spindle motor at
power-on. (Factory default configuration)
W9 Bus Parity Check Option
---------------------------
CLOSED The drive neither generates nor detects parity.
OPEN The drive generates parity and enables parity detection.
(Factory default configuration)
J3 DC Power and pin connector assignments
-------------------------------------------
+------------+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Return
+------------+ pin 3 + 5 Return
pin 4 + 5 VDC
**********************************************************************
I N S T A L L
**********************************************************************
MICROPL. 1670 SERIES PRODUCT DESCRIPTION 106179 REV. B
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 1670 series 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 air flow is restricted, a
fan may be required.
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 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 (Single-ended)
---------------------------------------------------
Interface control and status signals are digital (open collector TTL)
utilizing 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 receiverd signal 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 0.4 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 0.4 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) = 4.0 VDC to 5.25 VDC
800 milliamps minimum source drive capability.
1.0-milliamp maximum sink capability (except for the purposes of
providing power to an internal terminator) with 1.0 mp
recommended current limiting (e.g., a fuse).
The 1670 Series 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.
J3 DC Power Connector
----------------------
J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector on the Motor Control
board. Both +5V and +12V is 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.
Interface Terminator
--------------------
Interface Terminator pack RN9 provides proper termination for the
interface lines. For a multiple-device system, the terminator pack
is installed in the LAST drive on the cable.
Multiple-Drive Systems
----------------------
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 RN9 | |
o------+ J3 J4/J5 | |
---DC-VOLTAGES-----+ +--------+--------+ |
---GROUND--------------------------o------------------+
Interface Terminator RN9 is 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 1670 Series 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 1670 Series, resulting in an MTTR of
less than 15 minutes.
Data Transfers
--------------
1670 drives are capable of transferring data at 4.0 MB/s in
SYNCHRONOUS mode and 1.6 MB/s in ASYNCHRONOUS mode.
Read-Ahead
----------
The read-ahead function causes the 1670 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 for 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.
Data Buffer
-----------
The 64K data buffer may be divided into segments, with each segment
holding data from a different area of this disk.
Segmentation of the buffer maximizes the impact of read-ahead,
especially in a multi-tasking or multi-user environment. By
allocating a segment to each task or user, the chances of "cache
hits" and enhanced performance are greatly increased.
**********************************************************************
F E A T U R E S
**********************************************************************
MICROPL. 1670 SERIES PRODUCT DESCRIPTION 106179 REV. B
Command Pre-Processing
----------------------
Whenever possible, the 1670 Series prepares the next command for
execution (received from another host) while the current command is
executing. This feature takes advantage of any "dead" time, where the
drive's microprocessor would otherwise be inactive, such as during a
seek.
Like the read-ahead function, command pre-processing is a time
management technique that makes full use of the capabilities of the
1670 Series and enhances performance in multi-initiator systems.
Seek Time
---------
| 1670 |
----------------------------------+--------+
Track-to-Track msec. typ. | 4 |
Average msec. typ. | 16 |
msec. max | 37 |
One-Third Stroke msec. max. | 17 |
Latency msec. avg. | 8.33 |
Nominal msec. max. | 16.67 |
----------------------------------+--------+
The 1670 Series has programmable sectors sizes from 128 to 4000 bytes
in 1-byte increments.
Defect Management
-----------------
The 1670 Series has two techniques available for defect management:
track-oriented and cylinder-oriented.
Disk/Spindle Assembly
---------------------
Up to four magnetic disks (depending on the model) are mounted on the
spindle assembly, which includes a threephase brushless DC motor
(commutated by three Hall-effect sensors). The casting supports each
end of the spindle.
Interface
---------
The 1670 Series is fully compatible with the Small Computer System
Interface (SCSI) proposed by the American National Standards
Committee.
Formatted Capacity Calculation
------------------------------
The formatted capacity of the 1670 Series depends upon a number of
user-selectable variables. One very critical variable is sparing,
either track-oriented or cylinder-oriented. The following formula is
used to calculate the formatted capacity (C) of the 1670 Series
using cylinder-oriented sparing:
C = [(SPT x HDS) - (SPARE_SPC)] x (1249 - 3 - SPARE_CYL) x (BYTES)
SPARE SPC is the number of spare sectors per cylinder. This variable
is user programmable. The recommended value varies with each drive
model as follows:
1674-7 = 4
1674-6 = 3
1673-5 = 3
1673-4 = 2
1249 is the number of physical cylinders.
3 cylinders are used by the drive and are not user accessible.
SPARE CYL is the number of spare cylinders. This variable is user
programmable; a typical value for sparing is 3.