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SEAGATE TECHNOLOGY, INC.
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? United States +1 408 438-8771 ? United Kingdom +44 628 478011 ?
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(C)opyright 1994
ST-3780A (Medalist 720)
?????????????
? REAR VIEW ?
?????????????
40 pin I/O Cable Connection J1
2o o ?
1o o ?????????? ?????????? /?????????\ TOP (HDA)
???????::::::::::?::::::::1??? 0 0 0 0 ???
? ? ?????????????????????? ??5?G?G?12? BOTTOM
? ? ?
? ? ???? pin-20 removed
? ?
OFF OFF -- One drive only
ON OFF -- Drive is slave
OFF ON -- Drive is Master with slave present
ON ON -- Cable Select (must also jumper pins 6 and 8 on J8)
SPARE -- stored on pins 1-3
ST-3780A
????????????????
? Front View ?
????????????????
?????????????? Spare - as shipped
? ????????? Cable Select pins 6-8
(TOP) ? ? ????? Reserved
? ? ? ?? Remote LED 13-, 14+
? ? ??? ?
J8 o o o?o o o o14
Option Block ????????1o o o o o o ???????????????????PWA??????????
?
(BOTTOM) ??? pin 3 missing
Cable Select also requires Slave and Slave Present jumpers ON.
ST-3780A
???????????????????
? RIGHT SIDE VIEW ?
???????????????????
???? J6 Dual Drive emulation pins 1-2 AND pins 3-4
? (spare jumper stored on pins 1-3, as shipped)
2o o
BACK ??? 1o o TOP (HDA) FRONT
OF ???????????????????????P?W?A??????????????????????? OF
DRIVE ??? BOTTOM DRIVE
Note: If the Dual Drive Emulation jumper is used, then TWO CMOS drive
types will be required and only ONE drive per cable is allowed.
ST-3780A
Medalist 720
UNFORMATTED CAPACITY _____________________
FORMATTED CAPACITY (xx SECTORS) __________722
ACTUATOR TYPE ____________________________VOICE COIL
CYLINDERS __PHYSICAL______________________3,876
HEADS ______PHYSICAL______________________4
DISCS (3.5 in) ___________________________2
MEDIA TYPE _______________________________THIN FILM
HEAD TYPE ________________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (Mbits/sec) _______27.9 to 47.24
EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 16.6
PIO MODE _________________________________4
DMA SUPPORT ______________________________EISA Type B
SPINDLE SPEED (RPM) ______________________4,500
AVERAGE LATENCY (mSEC) ___________________6.67
BUFFER ___________________________________256 Kbyte SeaCache
Read/Write Multiple, Read Look-Ahead,
Multi-Segmented
INTERFACE ________________________________AT
SECTORS PER DRIVE ________________________1,410,864
TPI (TRACKS PER INCH) ____________________4,250
BPI (BITS PER INCH) ______________________70,101
AVERAGE ACCESS (ms) (read/write) _________12/14
SINGLE TRACK SEEK (ms) ___________________3.5
MAX FULL SEEK (ms) _______________________25
MTBF (power-on hours) Office _____________300,000
SHOCK (G's):
operating (Read/Write) __________2
nonoperating ____________________75
ACOUSTICS (typ/max dBA) __________________30/36
POWER DISSIPATION (watts) ________________
POWER REQUIREMENTS: +12V START-UP (amps) _1.9
POWER MANAGEMENT (Watts):
ACTIVE _______________6.6
IDLE _________________2.75
STANDBY ______________1
WRITE PRECOMP (cyl) ______________________N/A
REDUCED WRITE CURRENT (cyl) ______________N/A
LANDING ZONE (cyl) _______________________AUTO
IBM AT DRIVE TYPE ________________________*
Physical:
Height (inches/mm): 1/25.4
Width (inches/mm): 4.02/102.1
Depth (inches/mm): 5.77/146.6
Weight (lbs/kg): 1.5/0.68
* 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:
1399 cyl, 16 heads, 63 sectors = 722,018,304
DOS operating systems may require a system bios
that accepts or translates larger values for the
CMOS head parameter which lowers cylinders below
1024:
699 cyl, 32 heads, 63 sectors = 721,502,208
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:
699 cyl, 16 heads, 63 sectors = 360,751,104 (Master)
699 cyl, 16 heads, 63 sectors = 360,751,104 (Slave see Dual
Drive emulation jumper)
Note: A "custom" or "user-definded" 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. (08/17/94)