Cheetah 18
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Capacity:
Speed:
Average Read Time:
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18.21 GB
10000 rpm
6.2 ms |
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ST-118202LW Ultra2 SCSI Wide (Cheetah 18, LVD)
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� REAR VIEW � (ST-118202LW only)
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(TOP) J5 Auxiliary
___________________ ��� �1�/���������\
�( �����������������1)ͳ::::::�� 0 0 0 0 ��
\�����������ij����/ � �� 2���5�G�G�12�
68 pin I/O Cable� ������
Connection Male ������ SCSI ID = 0 (none)
�������� SCSI ID = 1
pin-11 +5v ��ٳ������ SCSI ID = 2
pin-10 GND ���ٳ����� SCSI ID = 4
������ SCSI ID = 8
pins 9 & 12 no connection ������� or pin-8 Activity LED*
* These pins are driven low for 250ms after PWR ON and RESET
to allow jumper selectable SCSI ID as shown above.
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� REAR VIEW � (ST-118202LC only)
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80 pin I/O and DC Power Wall/bracket Connection
� Female
J1 /���ij���������������\ TOP (HDA)
����������/ �������������������� \����������
(\�1������������������40/) BOTTOM
Notes on 80 pin I/O connector:
pins 1 - 4 = +12v 41 - 44 = 12v GND
34 - 36 = +5v 74 - 76 = 5v GND
37 = SYNC 77 = LEDC
38 = MTRON 78 = DLYDST
39 = SCSIA0 79 = SCSIA1
40 = SCSIA2 80 = SCSIA3
Mating connector: AMP US p/n: 2-557103-1 straight-in, Male 80-pin
2-557101-1 right angle to PCB
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� SIDE VIEW � (ST-118202LW/LC)
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FRONT TOP (HDA) J2 87654321 �
OF ���������������������������������P�W�A�����͵J1
DRIVE BOTTOM :::::::: �;
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Force Single-ended (LVD models only) �ٳ������ Term Power (LW only)�
Start Delay (12 secs * ID) ��ٳ����� Reserved �
Motor Start ���ٳ���� Reserved �
Write Protect ��������� Parity Disable �
�
�
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� Termination Power-source Table ����������������
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� ....�����PWA edge����� �
� 2 1 �
� A Drive Supplies Bus �ķ �
� �� �
� (not used on LC model) ��� �
� A �
����������Default no jumper ������������
Note: LW and LC drives do not have internal terminators or
any other way of adding internal terminators to the
drive; use external active termination if required.
Use active (ANSI SCSI-2 Alternative 2) terminators
when terminating the bus. Use active negation
terminators when terminating a SCSI Ultra2 bus
operating in Low Voltage Differential (LVD) mode.
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� FRONT VIEW � (ST-118202LW/LC)
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��ĴReserved. Shipped with cover installed.
� �Do not remove. Do not install jumpers
TOP (HDA) ���� 1
��P�W�A��������������������͵::::�::::::���
* BOTTOM ����;123456
� J6 ������
LED �� ������
Remote LED ٳ���� ID 1
(pin-11 +5v) ����� ID 2
Reserved �ٳ��� ID 4
(pin-10 GND) ���� ID 8
ST-118202LW
UNFORMATTED CAPACITY (GB) ________________22.54
FORMATTED CAPACITY (GB) __________________18.21
AVERAGE SECTORS PER TRACK ________________213 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________167,008
CYLINDERS ________________________________6,962 user
HEADS ______PHYSICAL______________________24
DISCS (3 in) _____________________________12
MEDIA TYPE _______________________________THIN FILM/MR
RECORDING METHOD _________________________PRML 8/9 PR4
INTERNAL TRANSFER RATE (mbits/sec)________152 to 231
EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
Low Voltage Differential(LVD) _______80 Sync
SPINDLE SPEED (RPM) ______________________10,025
AVERAGE LATENCY (mSEC) ___________________2.99
BUFFER (/optional) _______________________1MB/4MB
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________Ultra-SCSI Wide
Low Voltage Differential __________Ultra2-SCSI Wide
ASA II, SCAM level 2 (1 default)
BYTES PER TRACK __________________________104,840-159,008
SECTORS PER DRIVE ________________________35,566,479
TPI (TRACKS PER INCH) ____________________8962
BPI (KBITS PER INCH) _____________________183
AVERAGE ACCESS (ms read/write)____________6.0/6.8
Drive level with controller overhead
SINGLE TRACK SEEK (ms read/write) ________0.8/1.1
MAX FULL SEEK (ms read/write) ____________12.2/13.2
MTBF (power-on hours) ____________________1,000,000
SHOCK (G's, 11/2 ms):
operating (Read/Write) __________2
abnormal ________________________10
nonoperating ____________________50/125
ACOUSTICS (Bels typical, sound power) ____4.6
POWER DISSIPATION (watts/BTUs) Active ____19.1/65.3
Idle ______15.5/53
POWER REQUIREMENTS: +12V START-UP (amps) _2.5
+12V TYPICAL (amps) __0.98 idle
+5V START-UP (amps) __0.90
+5V TYPICAL (amps) ___0.74 idle
IDLE (watts) _________13
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Physical:
Height (inches/mm): 1.654/42.01
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146.1
Weight (lbs/kg): 2.0/0.907
Already low-level formatted at the factory with x spare sectors
per cylinder and x spare cylinder per unit.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (01/14/99)
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