ST-9840AG (Marathon 840sl)

                            TOP       �� 44-pin I/O Connector (* see below)
                                      �                    3o o1
                                    ::::::::::::�::::::::1 4o o2
                               �P�W�A������������������������������
                                                �           � �
       pin-20 removed for keying ����������������           � �
                                                            � �
�� PCBAs #23969-xxx (older, less common):                   � �
�    Drive is Master, no Slave drive present �������������� 0 0
�    Drive is Master, Seagate Slave drive present ��������� 1 0
�    Drive is Slave to another Seagate 2.5" Master �������� 0 1
�    Cable Select ����������������������������������������� 1 1
�
�� PCBAs #24736-xxx and 300222-xxx (newer, most common):
�    Drive is Master, Slave drive may be detected ��������� 0 0
�      using the DASP- signal
�    Drive is Slave ��������������������������������������� 0 1
�    Cable Select (horizontal jumper pins 2-4) �������������<<<
�
�� Note: Master and Slave settings are the same on either PCBA
         style. The Cable Select option is different.

 * 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-9840AG
                           Marathon 840sl

       FORMATTED CAPACITY _______________________840.2
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________
       HEADS ______PHYSICAL______________________4
       DISCS (2.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM on GLASS
       HEAD TYPE ________________________________MR
       RECORDING METHOD _________________________ZBR PRML (8/9)
       INTERNAL TRANSFER RATE (Mbits/sec) _______up to 60.8
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
       PIO MODE _________________________________4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________4,508
       AVERAGE LATENCY (mSEC) ___________________6.65
       BUFFER ___________________________________103 Kbyte
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________ATA-3
       SECTORS PER DRIVE (LBA mode) _____________1,641,340
       TPI (TRACKS PER INCH) ____________________5,555
       BPI (KBITS PER INCH) _____________________120
       AVERAGE ACCESS (ms read/write) ___________12/14
       SINGLE TRACK SEEK (ms read/write) ________4/5
       MAX FULL SEEK (ms read/write) ____________26/28
       MTBF (power-on hours) Office _____________300,000
       SHOCK (G's):
                operating (Read/Write) __________125
                abnormal ________________________
                nonoperating ____________________350
       ACOUSTICS (dBA) (typ/max)_________________24/30
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +5V START-UP (amps) __1.1
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________2.2
                           IDLE _________________0.9
                           STANDBY ______________0.3
                           SLEEP ________________0.1
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                        Height (inches/mm):     .504/12.7
                        Width  (inches/mm):     2.76/70.10
                        Depth  (inches/mm):     3.97/100.94
                        Weight      (oz/g):     5.64/160


 * 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 translations:
                       This translation is generally acceptable, as
                       is, for non-DOS operating systems:
       1628 cyl, 16 heads, 63 sectors = 840,204,288

                       DOS operating systems may require a translation
                       that uses larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
        814 cyl, 32 heads, 63 sectors = 840,204,288

                       Other FULL-CAPACITY solutions for DOS operating
                       systems include third-party drive preparation
                       software, system BIOS which supports LBA mode
                       or bios driven host adapters. Otherwise,
                       capacity may be limited to:
       1024 cyl, 16 heads, 63 sectors = 528,482,304


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
ZBR = Zone Bit Recording = Variable sectors per track

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. (04/02/97)