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USA BESTSELLER Vol 1-95 (Hepp-Computer)(1995).iso
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st11950w.txt
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1994-08-08
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SEAGATE TECHNOLOGY, INC.
Customer Technical Support FAX Network +1 408 438-8137
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 1993
ST-11950W SCSI-2 Fast Wide (Barracuda 1) (aka ST-11951N)
J01─────┐
(see 1│┐
╔═══════════╗ below) └─┘
║ REAR VIEW ║ 1─┐ ────────J4-1────┐
╚═══════════╝ │"│ |
│"│J4 1-6 │
│"│(see b elow) |
├"┤─J4-6──┐ │
(TOP) J5 └"┘-J4-7┐ | |
___________________ ┌── ─1┐/═════════\ | | |
═( ╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫╫1)═│::::::││ 0 0 0 0 ╞═ │ │ │
\────────────│────/ └ ── ┘└─5─G─G─12┘ │ │ 1
68 pin I/O Cable┘ ││││││ : : : : : : :
Connection ││││││ │ │ │ │ │ │ 2
││││││ Reserved ──────┘ │ │ │ │ │ │
Spindle Synch Cable Connector ──┘│││││ (some drives do │ │ │ │ │ │
(pin-11 SSREF, pin-12 ground) │││││ not have this │ │ │ │ │ │
Remote LED Connector ────────────┘││││ #7 jumper) │ │ │ │ │ │
[pin-9 cathode (neg), ││││ Enable Drive ────┘ │ │ │ │ │
pin-10 anode (pos)] ││││ Terminators │ │ │ │ │
││││ Reserved ──────────┘ │ │ │ │
SCSI ID = 8 ──────────────────────┘│││ (default OFF) │ │ │ │
SCSI ID = 4 ───────────────────────┘││ Parity Disable ──────┘ │ │ │
SCSI ID = 2 ────────────────────────┘│ Enable Motor Start ────┘ │ │
SCSI ID = 1 ─────────────────────────┘ Delay Motor Start ───────┘ │
SCSI ID = 0 (none) (10 sec * ID) │
Write Protect Enable ──────┘
┌────────────────────────────────┐
│ J01 - Terminator Power Jumpers ├──────────────────┐
└────────────────────────────────┘ │
Terminator power from the drive. ╓1──╖ *
(default) ╙°─°╜
° °
Terminator power from pin 26 on the ╓─╖
SCSI bus. °║°║
°╙°╜
Terminator to the SCSI bus on pin 26. ╓─╖ *
║°║°
╙°╜°
Terminator power to the SCSI bus and ╓─╥─╖*
drive. ║°║°║
╙°╜°╨
* Valid for single ended drives only.
Note: ST-11950WD (differential model) does not come with any
provision to use Termination resistors. Therefore, SCSI bus
needs to be externally terminated.
ST-11950W
UNFORMATTED CAPACITY (MB) ________________2030
FORMATTED CAPACITY (xx SECTORS) (MB) _____1690
AVERAGE SECTORS PER TRACK ________________81 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________40,665
CYLINDERS ________________________________2,706 user
HEADS ______PHYSICAL______________________15
DISCS (3.5 in) ___________________________8
MEDIA TYPE _______________________________THIN FILM
RECORDING METHOD _________________________ZBR RLL (1,7)
INTERNAL TRANSFER RATE (mbits/sec)________34.3 to 56.5
EXTERNAL TRANSFER RATE (mbyte/sec) _______20 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER __W/WD_____________________________1024/512 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________SCSI-2 FAST WIDE
BYTES PER TRACK __________________________50,888 average
SECTORS PER DRIVE ________________________3,291,790
TPI (TRACKS PER INCH) ____________________3,047
BPI (BITS PER INCH) ______________________52,187
AVERAGE ACCESS (ms) (read/write)__________8.0/9.0
Drive level without controller overhead
SINGLE TRACK SEEK (ms) ___________________0.6/0.9
MAX FULL SEEK (ms) _______________________17/19
MTBF (power-on hours) ____________________500,000
POWER REQUIREMENTS: +12V START-UP (amps) _2.18
+12V TYPICAL (amps) __0.83 idle
+5V START-UP (amps) __1.0
+5V TYPICAL (amps) ___0.76 idle
IDLE (watts) _________12.5
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Physical:
Height (inches/mm): 1.63/41.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.97/151.6
Weight (lbs/kg): 2.3/1.04
Already low-level formatted at the factory with 6 spare sectors
per cylinder and 1 spare cylinders per unit.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (08/08/94)