Barracuda 18 : ST118273FC
Barracuda 18
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Capacity:
Speed:
Average Read Time:
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18.02 GB
7200 rpm
7.9 ms |
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ST-118273FC Fibre Channel FC-AL, Dual Port (Barracuda 18)
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� REAR VIEW � ST-118273FC
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40 pin I/O and DC Power Wall/bracket Connection
� Female
J1 /���ij���������\ TOP (HDA)
����������/ �������������� \����������
(\�1������������20/) BOTTOM
Notes on 40 pin I/O connector:
+12v = pins 2, 3, 4, 21
+5v = pins 19, 20, 40
GND = pins 6, 22, 23, 26, 29, 32, 35
Mating FC connector: AMP US p/n: 787317-1 straight-in, Male 40-pin
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� FRONT VIEW � (ST-118273FC)
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Reserved. Shipped with cover installed.
Do not remove. Do not install jumpers
� ������ Reserved
� ������ Fault LED
� ������ Port B Bypass LED
� ������ Port A Bypass LED
TOP (HDA) ���� ����1
��P�W�A��������������������͵::::�::::::���
* BOTTOM ����;������
� J6 ��� ��� Ground
LED �� ������� Active LED
������� Ground
������� Remote LED (pin-11 +5v)
ST118273FC drives have two independent FC-AL ports. These
ports may be connected on independent loops or on the same
loop. Port A and Port B may be connected in any order or
combination.
ST-118273FC
UNFORMATTED CAPACITY (GB) ________________23.14
FORMATTED CAPACITY (GB) __________________18.21
AVERAGE SECTORS PER TRACK ________________236 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________150,020
CYLINDERS ________________________________7,501 user
HEADS ______PHYSICAL______________________20
DISCS (3.5 in) ___________________________10
MEDIA TYPE _______________________________THIN FILM/MR
RECORDING METHOD _________________________EPR4 16/17
INTERNAL TRANSFER RATE (mbits/sec)________120 to 190
INTERNAL FORMATTED TRANSFER RATE (MB/sec)_15.2 to 23.7
EXTERNAL TRANSFER RATE (mbyte/sec) _______106.3 Sync
Dual Port same buffer (mbyte/sec)___200 Sync
SPINDLE SPEED (RPM) ______________________7,200
AVERAGE LATENCY (mSEC) ___________________4.17
BUFFER (/optional) _______________________1MB/4MB
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________FC-AL
Fibre Channel - Arbitrated Loop, ASA II
BYTES PER TRACK (avg unformatted) ________155,000
SECTORS PER DRIVE ________________________35,566,480
TPI (TRACKS PER INCH) ____________________8250
BPI (KBITS PER INCH) _____________________180
AVERAGE ACCESS (ms read/write)____________7.9/8.7
Drive level with controller overhead
SINGLE TRACK SEEK (ms read/write) ________1.1/1.4
MAX FULL SEEK (ms read/write) ____________16/18
MTBF (power-on hours) ____________________1,000,000
SHOCK (G's, 11/2 ms):
operating (Read/Write) __________2
abnormal ________________________10
nonoperating ____________________75/140
ACOUSTICS (Bels typical, sound power) ____4.2
POWER DISSIPATION (watts/BTUs) Active ____23.3/79.4
Idle ______17.1/58.4
POWER REQUIREMENTS: +12V START-UP (amps) _3.1
+12V TYPICAL (amps) __0.8 idle
+5V START-UP (amps) __1.7
+5V TYPICAL (amps) ___1.5 idle
IDLE (watts) _________15
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Physical:
Height (inches/mm): 1.62/41.1
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146.1
Weight (lbs/kg): 2.1/0.93
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. (03/24/99)
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