Seagate ST31250W Barracuda 2L HARD DISK DRIVE REPAIR, Seagate ST31250W Barracuda 2L HARD DISK DRIVE SPECIFICATIONS,
Seagate ST31250W Barracuda 2L hard disk drive sales, Seagate ST31250W Barracuda 2L hard disk drive repair, Seagate ST31250W Barracuda 2L hard disk drive specifications, 
Seagate ST31250W Barracuda 2L Hard Disk Drive Repair, Seagate ST31250W Barracuda 2L Hard Disk Drive Specifications, Seagate ST31250W Barracuda 2L Seagate ST31250W
Specifications



seagate st31250w picture.
seagate st31250w picture.
seagate st31250w picture.

Seagate ST31250W Specifications
Model Capacity Size Height Bus Type Int.Type
ST31250W Barracuda 2L 1020MB 3.5" SL SCSI2 W

Barracuda 2LP   :    ST31250W
Barracuda 2LP

Capacity: 
Speed: 
Average Read Time: 
 

1.02 GB
7200 rpm
8 ms



ST-31250W/WC SCSI-2 Fast Wide (Barracuda 2LP)

�����������ͻ
� REAR VIEW �  (ST-31250W only)
�����������ͼ
                                         ������ ID 8
                                         ������ ID 4
                                         ������ ID 2
                                         ������ ID 1
               (TOP)                  J5 ����
                 ___________________  ���  �1�/���������\
               �( �����������������1)ͳ::::::�� 0 0 0 0 ��
                 \�����������ij����/  �  ��  ���5�G�G�12�
              68 pin I/O Cable�        ��
              Connection               ��   back  o o <--These pins not on
                                       ��         o o   differential model WD
       Spindle Synch Cable Connector ��ٳ  front  o o   See special WD Term
         (pin-11 SSREF, pin-12 ground)  �        2 � 1  Power detail below
       Remote LED Connector �������������     ������
        [pin-9 cathode (neg),                 �
         pin-10 anode (pos)]                  �
                                              �
                                              �
�� J1 Terminator options (single-ended ONLY) ������ (differential) Ŀ
�  o o       o o       o o       o o      �o�o�  �                  �
�  o o       o�o�     �o�o      �o�o�      o o   �    back 1o�o2    �
� �o�o�      o�o�     �o�o      �o�o�      o o   �         �o�o     �
� 2���1     2 ��1     2; 1     2���1     2   1  �   front �;      �
�  A         B         C         D         E     �          C       �
���������������������������������������������������������������������
  A - Term. power from drive (default)
  B - Term. power to SCSI bus
  C - Term. power from SCSI bus
  D - Term. power to SCSI bus and drive
  E - Enable SCSI terminator (jumper on pins 5-6)


  �����������ͻ
  � REAR VIEW �  (ST-31250WC only)
  �����������ͼ
                     80 pin I/O and DC Power Wall/bracket Connection
                     �  Female
    J1          /���ij���������������\      TOP (HDA)
     ����������/ �������������������� \����������
              (\�1������������������40/)    BOTTOM

     Notes on 80 pin I/O connector:
       pins  1 -  4 = +12v        41 - 44 = 12v GND
            34 - 36 = +5v         74 - 76 = 5v GND
                 37 = SYNC             77 = LEDC
                 38 = MTRON            78 = DLYDST
                 39 = SCSIA0           79 = SCSIA1
                 40 = SCSIA2           80 = SCSIA3

  Mating WC connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
                                   2-557101-1 right angle to PCB


  �����������������ͻ
  � RIGHT SIDE VIEW �  (ST-31250W/WC)
  �����������������ͼ


BACK   �͸       J2  123456789                   TOP (HDA)  FRONT
 OF   I/O�����������������������P�W�A����������������������� OF
DRIVE  �;           :::::::::                   BOTTOM     DRIVE
                     ���������
      1-2 Reserved ���ٳ�������� Reserved 7-9
  3 Parity Disable ����ٳ������� Delay Motor Start 6
   4 Write Protect ������������� Motor Start Enable 5



  ������������ͻ
  � FRONT VIEW �  (ST-31250W/WC)      �������� +5V
  ������������ͼ                      �������� Enable SCSI terminator
                                      �������� ID 8
                                      �������� ID 4
                                      �������� ID 2
                                      �������� ID 1   (J4 top row)
                      TOP (HDA)       ������1
     ��P�W�A��������������������͵::::::::::���  J4
                      BOTTOM      ����������
                                  ����������          (J4 bottom row)
                        Reserved ����ٳ�����
                   No connection �����ٳ����
                          Ground ������ٳ���
         Unit Active LED pin (+) �������ٳ��
          SSREF (+) spindle sync ��������ٳ�
                   Vendor Unique ���������ٳ
               Fault LED pin (+) �����������



                            ST-31250W
                            Barracuda 2LP

       UNFORMATTED CAPACITY (MB) ________________1205.3
       FORMATTED CAPACITY (xx SECTORS) (MB) _____1020.9
       AVERAGE SECTORS PER TRACK ________________107 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________18,555
       CYLINDERS ________________________________3,711 user
       HEADS ______PHYSICAL______________________5
       DISCS (3.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec)________47.5 to 72.0
       EXTERNAL TRANSFER RATE (mbyte/sec) _______5 Async
       EXTERNAL TRANSFER RATE (mbyte/sec) _______5.0 to 20 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER ___________________________________512 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2 FAST Wide
                                                 ASA II
       BYTES PER TRACK __________________________64,160 average
       SECTORS PER DRIVE ________________________
       TPI (TRACKS PER INCH) ____________________4,048
       BPI (BITS PER INCH) ______________________73,820
       AVERAGE ACCESS (ms) (read/write)__________8.0/9.0
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms) ___________________0.6/0.9
       MAX FULL SEEK (ms) _______________________17/19
       MTBF (power-on hours) ____________________800,000
       SHOCK (G's):
                operating (Read/Write) __________2
                nonoperating ____________________50
       ACOUSTICS (typ/max dBA) __________________4.7/
       POWER DISSIPATION (watts/BTUs) Active ____11/35
                                      Idle ______9/31
       POWER REQUIREMENTS: +12V START-UP (amps) _1.26
                           +12V TYPICAL (amps) __0.88 idle
                           +5V START-UP (amps) __0.91
                           +5V TYPICAL (amps) ___0.33 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.00/25.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146.05
                        Weight     (lbs/g):     1.2/545

Already low-level formatted at the factory with 9 spare sectors
per cylinder and 1 spare cylinder per unit.

ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product 
offerings or specifications. (05/20/96)

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