Hard Drive: SEAGATE: ST41651ND 1415MB 5.25"/FH SCSI2 DIFF
S T 4 1 6 5 1 N D SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 2107| | |
Capacity form/unform 1415/ 1650 MB Heads 15| | |
Seek time / track 15.0/ 2.5 ms Sector/track 87| | |
Controller SCSI2 DI/FAST Precompensation
Cache/Buffer 256 KB READ-AHEAD Landing Zone
Data transfer rate 4.000 MB/S int Bytes/Sector 512
10.000 MB/S ext SYNC
Recording method RLL 1/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 10 50 | -10 54
Power: sleep W Humidity % |
standby W Altitude km |
idle W Shock g |
seek 21.0 W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 150000
Warranty Month 12
Lift/Lock/Park YES Certificates
Layout
SEAGATE ST41651N PRODUCT DESCRIPTION
+---------------------------------------------------------++-1 | +-+ J6 || |J4 | | | ++ |+-+ | +-+ || |XX | || |XX | +1 |XX | Terminator ++ |XX J3 | resistor || |XX SCSI | (SIPs) || |XX I/O | +1 |XX | ++ |XX | || |XX | || |XX | +1 |XX | (J8+-+)|X1 | ( +-+)| | +-+J7 |XX Power | +-+ LED |XX J1 +---------------------------------------------------------+ 1
Jumpers
SEAGATE ST41651N PRODUCT DESCRIPTION
Jumper setting
==============
J4 SCSI ID/Option Select Header (20-pin)
-----------------------------------------
-------+--------------J4--------------+---
| o o o o o o o o o o |
| 1 o o o o o o o o o |
+-------+--+--+----------------+
TP TP 4 2 1 (2)(3)(6) +-++
(4) (7)
Drive ID/Option Select Header (Addendum) (16-Pin)
-------------------------------------------------
SCSI I/O
+-----J3---- -+ +J1-
--+------J4-------++::::::: ::++-J8+-+O O O Power
|2 o o o o o o o|+------- --+|o o| +-------
|1 o o o o o o o| |1 o|
+----+-+-+------+ +---+
+++ 4 2 1 | | + (6) (4)
(7) | +-- (3)
+---- (2)
The figure above shows the drive ID select and configuration option
select jumper headers (J4 and J8) that apply to some early customer
development units. Only a few of these will be shipped. This
addendum figure will be included in the preliminary Product Manual
until the drives being shipped change over to the PWA that has the
configuration shown in the first figure. The notes (1) through (7)
apply the same to either figure.
+------------+----------+
| | 4 2 1 |
+------------+----------+ Drive ID in binary coded jumper
|SCSI ID = 0 | o o o | position (most significant bit on
| | o o o | left), i.e., jumper in position 1
+------------+----------+ would be Drive ID 1, no jumpers means
|SCSI ID = 1 | o o x | ID 0.
| | o o X |
+------------+----------+
|SCSI ID = 2 | o x o |
| | o X o |
+------------+----------+
|SCSI ID = 3 | o x x |
| | o X X |
+------------+----------+
|SCSI ID = 4 | x o o |
| | X o o |
+------------+----------+
|SCSI ID = 5 | x o x |
| | X o X |
+------------+----------+
|SCSI ID = 6 | x x o |
| | X X o |
+------------+----------+
|SCSI ID = 7 | x x x |
| | X X X |
+------------+----------+
(2) CLOSED Enables the Motor Start Option. In this mode of
operation the drive will wait for a Start Unit Command
from the Host before starting the Motor.
OPEN see Note (6) below for description of delayed motor
start feature.
(3) CLOSED Parity checking by the WREN 8 is enabled.
(4) If the unit is not be terminated, remove terminator resistor
module SIPs. TP Jumper in left vertical position means
terminator power (+5V) is from WREN 8 power connector. Jumper
in horizontal position means terminator power is taken from
interface cable. Jumper in right TP position means +5V is
supplied to the interface cable pin 26. Jumpers can be in both
vertical positions at same time. If the drive is not terminated,
the TP jumper need not be installed.
(6) Jumper on enables delayed motor start (Motor Start jumper (2)
must be off). Motor start up is delayed 16 times drive ID number
in seconds; i.e., Drive 0 starts immediately, Drive 1 starts 16
seconds later, Drive 2 starts 16 seconds after Drive 1, etc.
(7) CLOSED Configures the drive for non-synchronized Spindle
option. A four pin connector plugs here to provide the
Reference Index Signal.
J6 Write Protect/Remote LED Header
-----------------------------------
+-+J7 LED +------- GND Pin 1 (+5V)
-+-+-----------+----+----+---- Pin 2 LED ON/OFF signal
| 2 o x +---- Factory use only!
| 1 o x +---- Factory use only!
+----+----+
+------- Write Protect, Remote switch Cable
Connection
The Write Protect/Remote LED Header is a 6-pin, 3 jumper (or
connector) position header behind the front panel at the right side
of the drive, opposite the LED. The pins are on 0.100 inch (2.54 mm)
centers both vertically and side to side. A suggested mating two pin
connector is the DuPont Mini Latch housing P/N 65291-008 or
equivalent. The drive front panel must not be present in order to
access the header. For a remote LED capability, plug the remote LED
cable connector vertically to the leftmost two pins of the header (as
viewed from the front of the drive). The center two pins provide a
drive write protect capability. A shorting jumper plug may be
plugged vertically onto these two pins to write protect the drive or
a two-pin cable connector may be plugged there to connect the two
pins to a remote Write Protect switch. The rigthmost two pins are
RESERVED for factory use only.
DC Power and pin connector assignments
--------------------------------------
--+------------+-- pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Volts Return
+------------+ pin 3 + 5 Volts Return
pin 4 + 5 VDC
Note: Pins on the drive select and configuration select header are
provided to facilitate manual drive configuration. No devices other
than jumpers should be connected to these pins. Improper connection
to external devices (switches, connectors, etc.) could adversely
affect drive performance. Exact location of these pins and headers
may change without notice.
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