|
| |
ST-1980N SCSI-2 Fast
+-----------+
| REAR VIEW |
+-----------+
50 pin I/O Cable Connection
|
J1+------------------------1+ /---------\ TOP (HDA)
-+:::::::::::::::::::::::::+-| 0 0 0 0 |--
+-------------------------+ +-5-G-G-12+ BOTTOM
1------+ 1------+ 1------+
+------+ +---+--+ +------+
+Terminating Resistors+
+-----------------+
| RIGHT SIDE VIEW |
+-----------------+
BACK +-+ J2 12345678 TOP (HDA) FRONT
OF J1+----------------------P-W-A----------------------- OF
DRIVE +-+ :::::::: BOTTOM DRIVE
||||||||
|Terminator Power +||||||+ Reserved
++Terminator Power -+||||+- Motor Start
| Factory Use --+||+-- Start Delay
| Parity ---++--- Write Protect
|
|
|
|
|
|
| +--------------------------------+
+-+ Termination Power-source Table |
+--------------------------------+-------------+
| 1 2 1 2 1 2 |
| +-+ +-+ A Drive Supplies Bus |
| |ø|ø ø|ø| +ø-ø+ B Drive Supplies Own |
| +ø+ø ø+ø+ +ø ø+ C Bus Supplies Drive |
| A B C |
|-----....-----....-----PWA edge----- |
| |
+------Default---------------------------------+
+----------------+
| LEFT SIDE VIEW |
+----------------+ If these ID jumpers are used,
then ID jumpers shown in front
view ARE NOT USED.
FRONT TOP (HDA) J5 +--1+ +-+BACK
OF --------P-W-A-------------------------------+:::+-+J1 OF
DRIVE BOTTOM +---+ +-+DRIVE
|||
ID 4 -+|+- ID 1
ID 2
+------------+
| FRONT VIEW |
+------------+
TOP (HDA) J6 +-----1+
--P-W-A--------------------------+::::::+-
* BOTTOM +------+
| 123456
LED -+ ||||||
ID 4 +||||+ Reserved
ID 2 -+||+- Remote LED (pin-3 +5v)
ID 1 --++-- Spindle Synchronization
(pin-6 REF SIG+)
If these ID jumper are used, then
ID jumpers shown in left side
view ARE NOT USED.
ST - 1980N
UNFORMATTED CAPACITY (MB) ________________1012
FORMATTED CAPACITY (xx SECTORS) (MB) _____860
AVERAGE SECTORS PER TRACK ________________
ACTUATOR TYPE ____________________________VOICE COIL
TRACKS ___________________________________22,516
CYLINDERS ________________________________1,732 (user)
HEADS ____________________________________13
DISCS (3.5 in) ___________________________7
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec) _______20 to 32
EXTERNAL TRANSFER RATE (mbyte/sec) _______4 Async
EXTERNAL TRANSFER RATE (mbyte/sec) _______10 Sync
SPINDLE SPEED (RPM) ______________________4,535
AVERAGE LATENCY (mSEC) ___________________6.61
BUFFER ___________________________________256 Kbyte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 Fast
BYTES PER TRACK __________________________44,960 avg.
TPI (TRACKS PER INCH) ____________________2,150
BPI (BITS PER INCH) ______________________
AVERAGE ACCESS (ms) (read/write)__________9.9/11.4
SINGLE TRACK SEEK (ms) ___________________2
MAX FULL SEEK (ms) _______________________26
MTBF (power-on hours) ____________________200,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.0
+12V TYPICAL (amps) __0.5
+5V TYPICAL (amps) ___0.24
TYPICAL (watts) ______7
MAXIMUM (watts) ______
LANDING ZONE (cyl)________________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Already low-level formatted at the factory.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (10/29/91) |