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Seagate ST318203LC SCSI Hard Drive
Item Number: SGT-ST318203LC-UP-OE
Manufacturer's Part Number: ST318203LC |
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Seagate Cheetah 18LP 18GB 10K U160 80pin SCA-2 SCSI Hard Drive ST318203LC - Used Pull OEM
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Capacity: 18GB
Spindle Speed: 10,000RPM
Interface Type: SCSI 80pin SCA-2 (Hot-Swap)
Disk Size: 3.5"x1.0" (Low Profile Hard Drive)
Sustained Throughput (MBps): 29.5
Average Seek Time (read/write ms): 5.4
Electrical Interface Speed: SCSI LVD U160 - 160MBps 16-bit
On-Board Cache: 1MB |
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These drives will fit in any of our SCSI hard drive trays: |
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The Cheetah 18LP family has the following standard features:
• Integrated Ultra/Ultra2 SCSI controller (ST318203 and ST39103 models)
• Integrated Ultra160 SCSI controller (ST318233 and ST39133 models)
• Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)
• 16 bit I/O data bus
• Asynchronous and synchronous data transfer protocol
• Firmware downloadable via SCSI interface
• Selectable even byte sector sizes from 512 to 4,096 bytes/sector
• Programmable sector reallocation scheme
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (post format)
• Enhanced ECC correction capability up to 185 bits
• Sealed head and disc assembly
• No preventative maintenance or adjustment required
• Dedicated head landing zone
• Embedded servo design
• Self diagnostics performed when power is applied to the drive
• 1:1 Interleave
• Zoned bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 1,024 kbyte data buffer (4,096 kbytes on LWV/LCV models)
• Hot plug compatibility (Section 9.6.4.2 lists proper host connector needed) for “LC’ and “LCV’ model drives
• SCAM (SCSI Configured Automatically) plug-n-play level 2 compliant, factory set to level 1
Media characteristics • The media used on the drive has a diameter of approximately 3.3 inches (84 mm).
• The aluminum substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability and environmental protection.
Performance • Supports industry standard Ultra2 SCSI interface (ST318203 and ST39103 models)
• Supports industry standard Ultra160 SCSI interface (ST318233 and ST39133 models)
• Programmable multi-segmentable cache buffer (see Section 3.1)
• 10,016 RPM spindle. Average latency = 2.99 ms
• Command queuing of up to 64 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
Reliability • 1,000,000 hour MTBF
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)
Compatibility
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SEAGATE TECHNOLOGY, INC.
1-800-SEAGATE
http://www.seagate.com
(C)opyright 1998
ST-318203LW Ultra2 SCSI Wide (Cheetah 18LP, LVD)
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º REAR VIEW º (ST-318203LW only)
ÈÍÍÍÍÍÍÍÍÍÍͼ
(TOP) J5 Auxiliary
___________________ ÚÄÄ Ä1¿/ÍÍÍÍÍÍÍÍÍ\
Í( ×××××××××××××××××1)ͳ::::::³³ 0 0 0 0 ÆÍ
\ÄÄÄÄÄÄÄÄÄÄÄijÄÄÄÄ/ À ÄÄ 2ÙÀÄ5ÄGÄGÄ12Ù
68 pin I/O CableÙ ³³³³³³
Connection Male ³³³³³³ SCSI ID = 0 (none)
³³³³³ÀÄÄ SCSI ID = 1
pin-11 +5v ÄÄÙ³³³ÀÄÄÄ SCSI ID = 2
pin-10 GND ÄÄÄÙ³ÀÄÄÄÄ SCSI ID = 4
ÃÄÄÄÄÄ SCSI ID = 8
pins 9 & 12 no connection ÀÄÄÄÄÄÄ 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.
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º REAR VIEW º (ST-318203LC only)
ÈÍÍÍÍÍÍÍÍÍÍͼ
80 pin I/O and DC Power Wall/bracket Connection
³ Female
J1 /ÄÄÄijÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ\ TOP (HDA)
ÍÍÍÍÍÍÍÍÍÍ/ ×××××××××××××××××××× \ÍÍÍÍÍÍÍÍÍÍ
(\Ä1ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ40/) 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
ÉÍÍÍÍÍÍÍÍÍÍÍ»
º SIDE VIEW º (ST-318203LW/LC)
ÈÍÍÍÍÍÍÍÍÍÍͼ
FRONT TOP (HDA) J2 87654321 Õ͸
OF ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍ͵J1
DRIVE BOTTOM :::::::: Ô;
³³³³³³³³
Force Single-ended (LVD models only) ÄÙ³³³³³³À Term Power (LW only)¿
Start Delay (12 secs * ID) ÄÄÙ³³³³ÀÄ Reserved ³
Motor Start ÄÄÄÙ³³ÀÄÄ Reserved ³
Write Protect ÄÄÄÄÙÀÄÄÄ Parity Disable ³
³
³
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³
³ Termination Power-source Table ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄ¿
³ ....ÍÍÍÍÍPWA edgeÍÍÍÍÍ ³
³ 2 1 ³
³ A Drive Supplies Bus ÖÄ· ³
³ øºøº ³
³ (not used on LC model) øÓø½ ³
³ A ³
ÀÄÄÄÄÄÄÄÄÄDefault no jumper ÄÄÄÄÄÄÄÄÄÄÄÙ
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.
ÉÍÍÍÍÍÍÍÍÍÍÍÍ»
º FRONT VIEW º (ST-318203LW/LC)
ÈÍÍÍÍÍÍÍÍÍÍÍͼ
ÚÄÄ´Reserved. Shipped with cover installed.
³ ÀDo not remove. Do not install jumpers
TOP (HDA) ÕØÍÍ͸ 1
ÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͵::::³::::::ÆÍÍ
* BOTTOM ÔÍÍÍ;123456
³ J6 ³³³³³³
LED ÄÙ ³³³³³³
Remote LED Ù³³³³À ID 1
(pin-11 +5v) ³³³ÀÄ ID 2
Reserved ÄÙ³ÀÄÄ ID 4
(pin-10 GND) ÀÄÄÄ ID 8
ST-318203LW
UNFORMATTED CAPACITY (GB) ________________21.6
FORMATTED CAPACITY (GB) __________________18.21
AVERAGE SECTORS PER TRACK ________________303 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________117,612
CYLINDERS ________________________________9,801 user
HEADS ______PHYSICAL______________________12
DISCS (3.0 in) ___________________________6
MEDIA TYPE _______________________________THIN FILM/MR
RECORDING METHOD _________________________PRML 16/17 EPR4
INTERNAL TRANSFER RATE (mbits/sec)________193 to 308
INTERNAL FORMATTED TRANSFER RATE (MB/sec)_29.5 avg
EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
Low Voltage Differential(LVD) _______80 Sync
SPINDLE SPEED (RPM) ______________________10,016
AVERAGE LATENCY (mSEC) ___________________2.99
BUFFER (/optional)________________________1024/4096 KByte
Read Look-Ahead, Adaptive,
Multi-Segmented Cache
INTERFACE ________________________________Ultra2 SCSI
ASA II, SCAM level 2 (1 default)
BYTES PER TRACK __________________________153,284-229,045
SECTORS PER DRIVE ________________________35,566,480
TPI (TRACKS PER INCH) ____________________12,580
BPI (PEAK KBITS PER INCH) ________________252
AVERAGE ACCESS (ms read/write)____________5.4/6.0
Drive level without controller overhead
SINGLE TRACK SEEK (ms read/write) ________0.7/0.9
MAX FULL SEEK (ms read/write) ____________12.2/13.2
MTBF (power-on hours) ____________________1,000,000
SHOCK (G's, 11/2/.5 ms):
operating (Read/Write) __________5
abnormal ________________________10
nonoperating ____________________75/200/100
ACOUSTICS (Bels typical, sound power) ____4.3
POWER DISSIPATION (watts/BTUs) Active ____/
Idle ______10.75/36.7
POWER REQUIREMENTS: +12V START-UP (amps) _2.4
+12V TYPICAL (amps) __0.6 idle
+5V START-UP (amps) __1.03
+5V TYPICAL (amps) ___0.71 idle
IDLE (watts) _________
LANDING ZONE (cyl) _______________________AUTO PARK
IBM AT DRIVE TYPE ________________________0 or NONE
Physical:
Height (inches/mm): 1.0/25.4
Width (inches/mm): 4.00/101.6
Depth (inches/mm): 5.75/146
Weight (lbs/kg): 1.3/0.589
Already low-level formatted at the factory with x spare sectors at
the end of each x cylinder region.
ZBR = Zone Bit Recording = Variable sectors per track
Seagate reserves the right to change, without notice, product
offerings or specifications. (01/11/2000)
Click here to view the manufacturers item description/brochure |
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