Seagate ST3285N HARD DISK DRIVE REPAIR, Seagate ST3285N HARD DISK DRIVE SPECIFICATIONS,
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Seagate ST3285N Hard Disk Drive Repair, Seagate ST3285N Hard Disk Drive Specifications, Seagate ST3285N Seagate ST3285N
Specifications



seagate st3285n picture.
seagate st3285n picture.
seagate st3285n picture.

Seagate ST3285N Specifications
Model Capacity Size Height Bus Type Int.Type
ST3285N 248MB 3.5" SL SCSI2 Fast

Legacy   :    ST3285N

Legacy

Capacity: 
Speed: 
Average Read Time: 
 

248.62 MB
4500 rpm
12 ms






ST-3285N
Rear View              �� 50 pin SCSI Interface I/O connector
                       �
                       �                    DC power
   (TOP)      �������������  ����������͸ /�5�G�G�12\
          ���͵::::::::::::::::::::::::1�͵ 0 0 0 0 ��
   (BOTTOM)   �������������������������; �����������
                 ������1 ������1 ������1
                 ������� ������� �������
                  Terminating Resistor Packs


ST-3285N
Left View                       o o o1
              (TOP)             o o o     �͸
     Front....���������������������������͵ I/O connector
                                � � �     �;
             SCSI Address ID 1 �� � �
                          ID 2 ���� �
                          ID 4 ������


ST-3285N
Right View

                 o o4     o o o6         (TOP)
           �͸  1o�o     1o�o o
    DC Power ������������  �    ��������������������������������
           �;    �        �
                  �      �������
                  �      Active/Passive Termination
                �����    �������
     Terminator Power  ��������������������������������Ŀ
                �����  � Active: Pins 1 & 2 shorted     �
                  �    �         only (+2.85V to        �
                  �    �         110 �) for FAST        �
                  �    �         SCSI;                  �
                  �    �Passive: Pins 2 & 4 shorted     �
                  �    �         AND pins 5 & 6 shorted �
                  �    �         (+5V and GND to        �
                  �    �         220/330 �) for         �
                  �    �         standard SCSI.         �
                  �    ����������������������������������
                  �
    ����������������������������������������������������������������������Ŀ
    �Terminator Power: From SCSI Connector ���������������� Pins 1 & 2     �
    �                  From Power Connector ��������������� Pins 1 & 3     �
    �                  To SCSI Connector Only ������������� Pins 3 & 4     �
    �                  From Power Connector and ����������� Pins 1 & 2 AND �
    �                    to SCSI Bus --------------------------- 3 & 4     �
    �                 Terminating Resistors not Installed � Pins 2 & 4     �
    ������������������������������������������������������������������������


ST-3285N
Front View

                 ������������������� SCSI ID's (none for ID0)
                 �                    not used if ID set on side jumpers
                 �   ��������������� Ext. Spindle Clock Synch
                 �   �                pin-5 is Clock Ground
                 �   � ������������� Remote LED
  (TOP)        ���Ŀ � �     ������� Reserved
               4 2 1 � � �������Ŀ
               o o o o o-o o o o o
              1o o o o o+o o o o o  o o o o+
               ��������������������1o o o o-����������������
                                    � � � �
  (BOTTOM)                          � � � ��� Remote LED
                                    � � ����� Ext. Spindle Clock Synch
                                    � �        pin-5 is Clock Ground
                                    � ������� Remote Start Enable
                                    ��������� Parity Enable



                             ST-3285N


       UNFORMATTED CAPACITY _____________________
       FORMATTED CAPACITY (xx SECTORS) __________248.62
       AVERAGE SECTORS PER TRACK ________________57 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________8,455
       CYLINDERS ________________________________1,689 (user)
       HEADS ____________________________________3
       DISCS (3.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______15.0 to 24.4
       EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
       EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
       SPINDLE SPEED (RPM) ______________________4,500
       AVERAGE LATENCY (mSEC) ___________________6.67
       BUFFER ___________________________________128 Kbyte SeaCache
        Read Look-Ahead Multisegmented cache
       INTERFACE ________________________________SCSI-2 Fast
       SECTORS PER DRIVE ________________________485,601
       TPI (TRACKS PER INCH) ____________________1,960
       BPI (BITS PER INCH) ______________________38,000
       AVERAGE ACCESS (ms) ______________________12
       SINGLE TRACK SEEK (ms) ___________________<4
       MAX FULL SEEK (ms) _______________________32
       MTBF (power-on hours) Office _____________250,000
       POWER REQUIREMENTS: +12V START-UP (amps) _1.5
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________5.7
                           IDLE _________________3.0
                           STANDBY ______________1.0
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________0

Formatted at the factory with 2 alternate cylinders.  Total physical
cylinders equal 1691.

       Physical:
                        Height (inches/mm):     1.00/25.4
                        Width  (inches/mm):     4.02/102.1
                        Depth  (inches/mm):     5.77/146.6
                        Weight    (lbs/kg):     1.5/0.68

Note: If FAST SCSI transfer rates are used, then the active
termination options must be used.  If the transfer rates are 5.0
MBytes/sec and below, either method of termination can be used.
Although active and passive terminated devices can be installed on the
same bus, both ends of the cable should be terminated in the same
manner, either both active or both passive.

Note: If your application requires no terminators, remove the
terminators from the circuit board.  Merely removing the terminator
power source selection jumper does not disconnect the terminator
resistors from the circuit.

ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product 
offerings or specifications. (08/08/94)

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