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st1480a.txt
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1993-06-14
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SEAGATE TECHNOLOGY, INC.
Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
┌──────────────────────────────────┬─────────────────────────────────┐
│ United States +1 408 438-8771 │ United Kingdom +44 628 478011 │
├──────────────────────────────────┼─────────────────────────────────┤
│ Germany +49 89 140-9331 │ Singapore +65 227-2217 │
└──────────────────────────────────┴─────────────────────────────────┘
(C)opyright 1991
ST-1480A AT Interface
J5 Drive ID Select and │ │ J6 (located on side
Configuration Select Header│ │ near rear)
──────────────────────┬────┘ └──────────┬─────────
│ o o1
40-pin I/O Cable Connector │ +5v ---o o
╒═══════════════════1╕ o o o o o1 ══════
J4│::::::::::∙:::::::: │ /─────────\ o o o o o │ │
═╧══════════╤════════2╧═│ 0 0 0 0 │═E═D═C═B═A═ Remote LED│┘ └│Reserved
(pin 20 missing for └─5─G─G─12┘ (see below) Connection│ │Jumper
keying purposes) DC Power │Position
J5
JUMPER | FUNCTION:
A REFSIG: This location provides a port for external connection
of the synchronized spindle reference signal (pin-1) and ground
(pin-2). It is also available on J4 pin-28 if the factory jumper is
installed. The drive will self-determine if it is a master of slave
for spindle synchronization.
B HOST SLV/ACT: When this shunt is installed, -SLAVE PRESENT is
applied to J4 pin-39 for systems that require this signal from the
Slave drive. If jumper "B" is installed, then jumper "E" must not be
installed.
C MASTER: When this shunt is installed, the drive is configured
as the Master. When not installed, the drive is a Slave.
D SLAVE PRESENT: When installed, this shunt indicates to the
Master drive that a Slave is present. This shunt must be installed on
the Master drive in a two-drive system.
E ACTIVE: When this shunt is installed, DASP- is made present on
J4 pin-39. If "E" is installed, then "B" must not be installed.
ST - 1480A
UNFORMATTED CAPACITY (MB) ________________492
FORMATTED CAPACITY (xx SECTORS) (MB) _____426
AVERAGE SECTORS PER TRACK ________________62 (rounded down)
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________13,302
CYLINDERS ________________________________1474
HEADS ____________________________________9
DISCS ____________________________________5
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ARLL 1,7 (ZBR)
INTERNAL TRANSFER RATE (mbits/sec) _______17 to 25
SPINDLE SPEED (RPM) ______________________4,412
INTERFACE ________________________________AT
TPI (TRACKS PER INCH) ____________________1760
BPI (BITS PER INCH) ______________________
AVERAGE ACCESS (ms) ______________________14
SINGLE TRACK SEEK (ms) ___________________2.5
MTBF (power-on hours) ____________________150,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.5
+12V TYPICAL (amps) __0.7
+5V TYPICAL (amps) ___0.7
TYPICAL (watts) ______8
MAXIMUM (watts) ______15
BUFFERED STEP PULSE RATE (micro sec) _____
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE ________________________*
Possible translation: 895 cyl, 15 heads, 62 sectors = 426,163,200
* 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)
PHYSICAL/LOGICAL equivalent to NATIVE/TRANSLATION
ZBR = Zone Bit Recording = Variable sectors per track
!WARNING! - 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. (4/12/91)