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Barracuda 2HP

Capacity:
Speed:
Average Seek Time:
 

1.85 GB
7200 rpm
8 ms


Installation Guide | Product Manual

 

Odd characters? Click here for help. A version of this specification with the linedraw characters approximated by text is available by clicking here.

                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1993



ST-12450W SCSI-2 Fast Wide (Barracuda 2, 2HP)
2HP = 2 Head Parallel = two read write channels at once

                                        J01ÄÄÄÄÄ¿
                                       (see    1³¿
ÉÍÍÍÍÍÍÍÍÍÍÍ»                           below) ÀÄÙ
º REAR VIEW º                                  1Ä¿ ÄÄÄÄÄÄÄÄJ4-1ÄÄÄÄ¿
ÈÍÍÍÍÍÍÍÍÍÍͼ                                  ³"³                 |
                                               ³"³J4 1-6           ³
                                               ³"³(see below)      |
                                               Ã"´ÄJ4-6ÄÄ¿         ³
        (TOP)                    J5            À"Ù-J4-8¿ |         |
          ___________________  ÚÄÄ  Ä1¿/ÍÍÍÍÍÍÍÍÍ\     | |         |
        Í( ×××××××××××××××××1)ͳ::::::³³ 0 0 0 0 ÆÍ    ³ ³         ³
          \ÄÄÄÄÄÄÄÄÄÄÄijÄÄÄÄ/  À  ÄÄ  ÙÀÄ5ÄGÄGÄ12Ù     ³ ³         1
       68 pin I/O CableÙ        ³³³³³³                 : : : : : : :
       Connection               ³³³³³³                 ³ ³ ³ ³ ³ ³ 2
                                ³³³³³³  Reserved ÄÄÄÄÄÄÙ ³ ³ ³ ³ ³ ³
Spindle Synch Cable Connector ÄÄÙ³³³³³   (J4-7 and J4-8  ³ ³ ³ ³ ³ ³
  (pin-11 SSREF, pin-12 ground)  ³³³³³    are reserved)  ³ ³ ³ ³ ³ ³
Remote LED Connector ÄÄÄÄÄÄÄÄÄÄÄÄÙ³³³³                   ³ ³ ³ ³ ³ ³
 [pin-9 cathode (neg),            ³³³³  Enable Drive ÄÄÄÄÙ ³ ³ ³ ³ ³
  pin-10 anode (pos)]             ³³³³   Terminators       ³ ³ ³ ³ ³
                                  ³³³³  Reserved ÄÄÄÄÄÄÄÄÄÄÙ ³ ³ ³ ³
SCSI ID = 8 ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ³³³   (default OFF)       ³ ³ ³ ³
SCSI ID = 4 ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ³³  Parity Disable ÄÄÄÄÄÄÙ ³ ³ ³
SCSI ID = 2 ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ³  Enable Motor Start ÄÄÄÄÙ ³ ³
SCSI ID = 1 ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ  Delay Motor Start ÄÄÄÄÄÄÄÙ ³
SCSI ID = 0 (none)                       (10 sec * ID)             ³
                                        Write Protect Enable ÄÄÄÄÄÄÙ
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
³ J01 - Terminator Power Jumpers ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ                  ³
            Terminator power from the drive.       Ö1ÄÄ· *
              (default)                            ÓøÄø½
                                                    ø ø
            Terminator power from the                ÖÄ· *
              SCSI bus.                             øºøº
                                                    øÓø½

            Terminator power to the SCSI bus        ÖÄ·  
                                                    ºøºø
                                                    Óø½ø

            Terminator power to the SCSI bus and    ÖÄÒÄ·*
              drive.                                ºøºøº
                                                    Óø½øÐ
            * Valid for single-ended drives only.


    Note: ST-12450WD (differential model) does not come with any
          provision to use Termination resistors.  Therefore, SCSI bus
          needs to be externally terminated.


                            ST-12450W


       UNFORMATTED CAPACITY (MB) ________________2437
       FORMATTED CAPACITY (512 byte sectors)_____1849
       FORMATTED CAPACITY (2048 byte sectors)____2134
           Standard OEM model formatted to 512
           bytes/block
       AVERAGE SECTORS PER TRACK ________________149 rounded down
       ACTUATOR TYPE ____________________________ROTARY VOICE COIL
       TRACKS ___________________________________48,726
       CYLINDERS ________________________________2,710 user
       HEADS ______PHYSICAL/LOGICAL______________18/9
       DISCS (3.5 in) ___________________________10
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec):
         Per Logical Head _______________________68.6 to 113.0
         Per Physical Head ______________________34.3 to 56.5
       EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync
       SPINDLE SPEED (RPM) ______________________7,200
       AVERAGE LATENCY (mSEC) ___________________4.17
       BUFFER ___________________________________1024 KByte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2 FAST WIDE
                                                 ASA
       BYTES PER TRACK __________________________99,536 average
       SECTORS PER DRIVE ________________________3,957,500
       TPI (TRACKS PER INCH) ____________________3,047
       BPI (BITS PER INCH) ______________________52,187
       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) ____________________500,000
       SHOCK (G's):
                operating (Read/Write) __________2
                nonoperating ____________________50
       ACOUSTICS (typ/max dBA) __________________4.7/
       POWER DISSIPATION (watts/BTUs) Active ____16/54
                                      Idle ______15/51
       POWER REQUIREMENTS: +12V START-UP (amps) _2.18
                           +12V TYPICAL (amps) __0.83 idle
                           +5V START-UP (amps) __1.0
                           +5V TYPICAL (amps) ___0.76 idle
                           IDLE (watts) _________13.5
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       Physical:
                        Height (inches/mm):     1.63/41.4
                        Width  (inches/mm):     4.00/101.6
                        Depth  (inches/mm):     5.97/151.6
                        Weight    (lbs/kg):     2.3/1.04

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. (02/05/98)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/st12450w.txt.


 



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