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-9145AG and ST-9145A

                            TOP       ÚÄ 44-pin I/O Connector (* see below)
                                      ³                     o o
                                    ::::::::::::ù::::::::1  o o
                               ÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ
                                                ³           ³ ³
       pin-20 removed for keying ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ           ³ ³
                                                            ³ ³
                                                            ³ ³
 Drive is Master, no Slave drive present ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 0 0
 Drive is Master, Seagate Slave drive present ÄÄÄÄÄÄÄÄÄÄÄÄÄ 1 0
 Drive is Slave to another Seagate 2.5" Master ÄÄÄÄÄÄÄÄÄÄÄÄ 0 1
 Reserved Position (Do Not Use) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 1 1

 * Drive uses +5vdc power supplied to the drive
   via the interface connector. The drive does
   NOT make use of a +12vdc power line.
   pin-41  +5vdc (Logic)
   pin-42  +5vdc (Motor)
   pin-43  Ground
   pin-44  Reserved


                            ST-9145AG


       UNFORMATTED CAPACITY (MB) ________________145
       FORMATTED CAPACITY (xx SECTORS) (MB) _____127.9
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS (USER) _PHYSICAL/LOGICAL___________5852/14700
       CYLINDERS __PHYSICAL/LOGICAL______________1463/980
       HEADS ______PHYSICAL/LOGICAL______________4/15
       DISCS (2.5 in)____________________________2
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (2,7)
       TRANSFER RATE INTERNAL (mbits/sec)________up to 16
       SPINDLE SPEED (RPM) ______________________3,449
       AVERAGE LATENCY (mSEC) ___________________8.69
       BUFFER ___________________________________32/64 KByte SeaCache
        Multisegmented cache
       INTERFACE ________________________________AT BUS
       SECTORS PER DRIVE ________________________249,900
       TPI (TRACKS PER INCH) ____________________2,650
       BPI (BITS PER INCH) ______________________45,500
       FCI (FLUX DENSITY) _______________________30,300
       AVERAGE ACCESS (ms) ______________________16
       SINGLE TRACK SEEK (ms) ___________________5
       MAX FULL SEEK (ms) _______________________27
       MTBF (power-on hours) ____________________150,000
       SHOCK (G's):
         ST9145A   operating/nonoperating _______10/150
         ST9145AG  operating/nonoperating _______100/150
          SafeRite shock sensor
       ACOUSTICS (dBA) (typ/max) ________________30/33
       POWER REQUIREMENTS: +5V START-UP (amps) __1.2
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________1.8
                           IDLE _________________0.7
                           STANDBY ______________0.17
                           SLEEP ________________0.17
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):     0.75/19.0
                        Width  (inches/mm):     2.76/70.10
                        Depth  (inches/mm):     4.01/101.9
                        Weight    (oz/kg):      4.8/0.136

 * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)

Possible translation:   980 cyl, 15 heads, 17 sectors = 127,948,800

Note: A "custom" or "user-defined" CMOS drivetype  may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder.  A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".

PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION

Already low-level formatted at the factory.

Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.

Seagate reserves the right to change, without notice, product 
offerings or specifications. (01/04/96)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/st9145a.txt.