Hard Drive: MAXTOR: MXT-1250SN 1240MB 3.5"/HH SCSI1 NOVE
M X T - 1 2 5 0 S N MAXTOR
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 2389| | |
Capacity form/unform 1240/ 1524 MB Heads 15| | |
Seek time / track 8.5/ 1.8 ms Sector/track | | |
Controller SCSI1 NOVELL Precompensation
Cache/Buffer 256 KB Landing Zone
Data transfer rate 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 5 55 | -40 65
Power: sleep W Humidity % 5 95 | 5 95
standby W Altitude km -0.305 3.048| -0.305 3.048
idle W Shock g 3 | 50
seek W Rotation RPM 6300
read/write 21.0 W Acoustic dBA 35
spin-up W ECC Bit 88,REED SOLOMON
MTBF h 300000
Warranty Month
Lift/Lock/Park YES Certificates CSA,FCC,IEC380,TUV,UL478
Layout
MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 REV. A
+---------------------------------------------------------+ | JP5+--+ +-+JP4 +-----+J7 JP8 |XX | | | +-+ 1-----+ +---+ ++ |XX |+-+ +--1 +---+ || |XX || |J4 RN2|| |XX |+-+ || |XX |+-+ +--+JP2 +1 |XX J1 || | +--1 ++ |XX || |J2 RN1|| |XX || | || |XX || | +-+JP1 || |XX || | +-+ +1 |XX |+-+ +J6----+ |XX | 1------+ |XX | +-+ |X1 | | |J5 | | +-+ |XX Power | |XX +---------------------------------------------------------+
Tailgate PCB for Differential SCSI
/--------------DRIVE-------------------------------------
/ / |
/ / |
+--------------------------------------------------------+ |
| XXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX | |
| 4 Pin male DC Male SCSI on Drive PCB | |
| connector on Drive PCB | |
| +-------------------------------------------+ | |
4 female DC connector +----------------------------+Female|SCSI on
XXXXXXXXX | +----------------------------+back side of |
| | | | | tailgate PCB |
+--+-+-+-+----+ | | /
| ++-+-+-++ | | /
| +-------+ +---JP1 | |/
| | |SCSI ID +-+
| +---+ |
| |
| |
| J4 J3 |
| XXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
+---------------------------------------------------------+
Male Connector Male SCSI Connector to SCSI Bus
for Power Supply
Jumpers
MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 REV. A
Jumper setting
==============
x = Jumper set at factory
J3 Power Connector
-------------------
----+------------+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Volts Return
----+------------+ pin 3 + 5 Volts Return
pin 4 + 5 VDC
J4 Service Connector Pin Assignment
------------------------------------
----+------+------+------+------+------+---PCB
|Pin 2 |Pin 4 |Pin 6 |Pin 8 |Pin 10|
|CNMI |DTR |GND |SPDL |-LED |
| | | |Pu.REF|DRV |
+------+------+------+------+------+
|Pin 1 |Pin 3 |Pin 5 |Pin 7 |Pin 9 |
|GND |DTX |GND |N/C |+ 5V |
| | | | | |
+------+------+------+------+------+
When an LED is connected to pins nine and ten, it functions in the
same manner as the LED which is mounted on the disk drive's face-
plate. This is typically used in cases when the drive is mounted in a
position where the LED is not visible or the faceplate is removed.
Pins three (transmit data, DTX) and four (receive data, DTR) are the
main communication lines. Pin two is for factory use only. Pins five
and six are signal ground lines. Pin eigth is used to synchronize the
spindles in multiple drive applications.
J6 SCSI ID Setting
-------------------
+----------+
| 9 7 5 3 1|
|10 8 6 4 2|
+----------+
+--------+----------+-------+-------+-------+
|SCSI ID | Priority | 5 & 6 | 3 & 4 | 1 & 2 |
+--------+----------+-------+-------+-------+
| 0 | Lowest |OPEN |OPEN |OPEN |
| 1 | . |OPEN |OPEN |CLOSED |
| 2 | . |OPEN |CLOSED |OPEN |
| 3 | . |OPEN |CLOSED |CLOSED |
| 4 | . |CLOSED |OPEN |OPEN |
| 5 | . |CLOSED |OPEN |CLOSED |
|x 6 | . |CLOSED |CLOSED |OPEN |
| 7 | Highest |CLOSED |CLOSED |CLOSED |
+--------+----------+-------+-------+-------+
(MSB) (LSB)
SCSI ID jumpers (pins one through six on J6) are provided to con-
figure each disk drve with a SCSI device ID for use in multiple SCSI
device configurations.
An ID of seven is the highest priority in a multiple device
configuration, and is usually used by the initiator.
The disk drive is shipped from the factory with an ID of six. This
assures that sufficient jumpers are available for any address except
seven, which is usually reserved for the host system.
J6 Parity
---------
x 7-8 CLOSED Enables Parity detection
OPEN Disables Parity detection
Parity detection can be disabled by removing the jumper from pins
seven and eight of J6. Odd parity detection is incorporated by the
disk drive. Odd parity is always generated.
J6 Drive Spin-Up Options (spin with power)
-------------------------------------------
x 9-10 CLOSED Start when power is applied
OPEN Wait for START Command
Wait for START Command: With no jumper pins nine and ten of J6, the
disk drive does not spin up until the initiator issues a START/STOP
UNIT (1Bh) command with the start bit set to one.
Start When Power is Applied: When pins nine and ten of J6 are
jumpered, the motor starts as soon as power is applied. The disk
drive is shipped in this configuration.
J7 Single Ended or Differential
--------------------------------
Single Ended Differential
+---+ +---+
12|o o|11 12|xxx|11
10|o o|9 10|xxx|9
8|o o|7 8|xxx|7
6|o o|5 6|xxx|5
4|xxx|3 4|o o|3
2|o o|1 2|xxx|1
+---+ +---+
xxx = CLOSED
The SCSI bus signals may be either single ended or differential. If a
single ended signal is desired, configure J7 so that pins 3 and 4 are
jumpered and all other pins are not.
JP1 +-----------------+ SCSI ID on Tailgate PCB, Differential
|6 o o 5 (MSB)|
|4 o o 3 |
|2 o o 1 (LSB)|
+-----------------+
If a differential signal is desired, an optional "tailgate" PCB must
be added to the drive. The tailgate PCB must have JP1 configured
for the same ID as the disk drive. Additionally J7 (drive PCB) must
have jumpers on pins 1 and 2, 5 and 6, 7 and 8, 9 and 10, and 11 and
12, while pins 3 and 4 should not have a jumper.
JP2/JP4/JP5 Test
-----------------
JP2, JP4 and JP5 are used during the manufacturing process for
testing. After testing, the disk drive is shipped with JP4, the
write protect jumper, installed, which write enables the drive.
Removal of this jumper write protects the drive.
JP8 Terminator Power Selection
-------------------------------
x CLOSED Terminator Power to the SCSI bus is protected by a fuse
(1A) installed on the PCB.
OPEN The drive is prevented from supplying termination power
to the SCSI bus.
Power to the terminators may come internally from the disk drive or
externally from the SCSI bus.
The drive electronics are capable of sensing if the host is providing
power to the terminators. If the host is not providing power, the
disk drive automatically provides power to the terminators via a
regulated (active) power source.
The function of JP8 is the same for the single ended and differential
versions.
My Books
