Seagate ST318275LW Barracuda HARD DISK DRIVE REPAIR, Seagate ST318275LW Barracuda HARD DISK DRIVE SPECIFICATIONS,
Seagate ST318275LW Barracuda hard disk drive sales, Seagate ST318275LW Barracuda hard disk drive repair, Seagate ST318275LW Barracuda hard disk drive specifications, 
Seagate ST318275LW Barracuda Hard Disk Drive Repair, Seagate ST318275LW Barracuda Hard Disk Drive Specifications, Seagate ST318275LW Barracuda Seagate ST318275LW
Specifications



seagate st318275lw picture.
seagate st318275lw picture.
seagate st318275lw picture.

Seagate ST318275LW Specifications
Model Capacity Size Height Bus Type Int.Type
ST318275LW 18300MB 3.5" HHT UL2 W

Barracuda 18LP   :    ST318275LW

Barracuda 18LP

Capacity: 
Speed: 
Average Read Time: 
 

18.21 GB
7200 rpm
6.9 ms


ST-318275LW Ultra2 SCSI Wide (Barracuda 18LP, LVD)

  �����������ͻ
  � REAR VIEW �  (ST-318275LW only)
  �����������ͼ
        (TOP)                  J5 Auxiliary
          ___________________  ���  �1�/���������\
        �( �����������������1)ͳ::::::�� 0 0 0 0 ��
          \�����������ij����/  �  �� 2���5�G�G�12�
       68 pin I/O Cable�        ������
       Connection Male          ������   SCSI ID = 0 (none)
                                �������� SCSI ID = 1
                   pin-11 +5v ��ٳ������ SCSI ID = 2
                   pin-10 GND ���ٳ����� SCSI ID = 4
                                  ������ SCSI ID = 8
      pins 9 & 12 no connection   ������� or pin-8 Activity LED*

* These pins are driven low for 250ms after PWR ON and RESET
  to allow jumper selectable SCSI ID as shown above.


  �����������ͻ
  � REAR VIEW �  (ST-318275LC 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 connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
                                   2-557101-1 right angle to PCB

  �����������ͻ
  � SIDE VIEW �  (ST-318275LW/LC)
  �����������ͼ

             FRONT    TOP (HDA)    J2  87654321              �͸
              OF ���������������������������������P�W�A�����͵J1
             DRIVE    BOTTOM           ::::::::              �;
                                       ��������
 Force Single-ended (LVD models only) �ٳ������ Term Power (LW only)�
           Start Delay (12 secs * ID) ��ٳ����� Reserved            �
                          Motor Start ���ٳ���� Reserved            �
                        Write Protect ��������� Parity Disable      �
                                                                    �
                                                                    �
                    ��������������������������������Ŀ              �
                    � Termination Power-source Table ����������������
                    ��������������������������������������Ŀ
                    �               ....�����PWA edge����� �
                    �                            2 1       �
                    � A Drive Supplies Bus        �ķ      �
                    �                            ��      �
                    �  (not used on LC model)    ���      �
                    �                             A        �
                    ����������Default no jumper ������������

     Note: LW and LC drives do not have internal terminators or
           any other way of adding internal terminators to the
           drive; use external active termination if required.
           Use active (ANSI SCSI-2 Alternative 2) terminators
           when terminating the bus.  Use active negation
           terminators when terminating a SCSI Ultra2 bus
           operating in Low Voltage Differential (LVD) mode.

  ������������ͻ
  � FRONT VIEW �  (ST-318275LW/LC)
  ������������ͼ
                                  ��ĴReserved. Shipped with cover installed.
                                  �  �Do not remove. Do not install jumpers
                      TOP (HDA)  ����͸     1
     ��P�W�A��������������������͵::::�::::::���
                 *    BOTTOM     ����;123456
                 �               J6    ������
            LED ��                     ������
                            Remote LED ٳ���� ID 1
                           (pin-11 +5v) ����� ID 2
                              Reserved �ٳ��� ID 4
                           (pin-10 GND)  ���� ID 8



                            ST-318275LW



       UNFORMATTED CAPACITY (GB) ________________
       FORMATTED CAPACITY (GB) __________________18.21
       AVERAGE SECTORS PER TRACK ________________303 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________117,210
       CYLINDERS ________________________________11,721 user
       HEADS ______PHYSICAL______________________10
       DISCS (3.5 in) ___________________________5
       MEDIA TYPE _______________________________THIN FILM/MR
       RECORDING METHOD _________________________PRML 16/17 EPR4
       INTERNAL TRANSFER RATE (mbits/sec)________137 to 240
       EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
            Low Voltage Differential(LVD) _______80 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER (/optional)________________________1024/4096 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________Ultra2 SCSI
              ASA II, SCAM level 2 (1 default)
       BYTES PER TRACK __________________________186 KByte avg
       SECTORS PER DRIVE ________________________35,566,480
       TPI (TRACKS PER INCH) ____________________12,580
       BPI (PEAK KBITS PER INCH) ________________223
       AVERAGE ACCESS (ms read/write)____________6.9/7.7
         Drive level without controller overhead
       SINGLE TRACK SEEK (ms read/write) ________0.9/1.2
       MAX FULL SEEK (ms read/write) ____________15/16
       MTBF (power-on hours) ____________________1,000,000
       SHOCK (G's, 11/2 ms):
                operating (Read/Write) __________5
                abnormal ________________________10
                nonoperating ____________________75/150
       ACOUSTICS (Bels typical, sound power) ____4.1
       POWER DISSIPATION (watts/BTUs) Active ____16.8/57.3
                                      Idle ______9.75/33.3
       POWER REQUIREMENTS: +12V START-UP (amps) _1.6
                           +12V TYPICAL (amps) __0.5 idle
                           +5V START-UP (amps) __1.05
                           +5V TYPICAL (amps) ___0.75 idle
                           IDLE (watts) _________
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):      1.0/25.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.75/146
                        Weight    (lbs/kg):      1.3/0.589

Already low-level formatted at the factory with x spare sectors at
the end of each x cylinder region.  

ZBR = Zone Bit Recording = Variable sectors per track


Seagate reserves the right to change, without notice, product 
offerings or specifications. (11/13/99)


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