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Description:
| Barracuda 18LP drives combine magnetoresistive (MR) heads, partial response/maximum likelihood (PRML) read channel electronics, embedded servo technology, and a SCSI-3 (Fast-20 and Fast-40) interface to provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers.
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Features:
- Integrated SCSI controller
- SCSI multimode single-ended or low voltage differential drivers and receivers
- 8 bit or 16 bit I/O data bus models available
- Asynchronous and synchronous data transfer protocol
- Firmware downloadable via SCSI interface
- Selectable sector sizes from 512 to 2,048 bytes/sector in multiples of 2 bytes/sector
- Programmable drive capacity
- 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 laser textured head landing zone
- Embedded servo data rather than a separate servo data surface
- 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 MByte data buffer or 4 Mbyte optional
- Hot plug compatibility
- SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to level 1 (not user selectable)
- Low audible noise for office environment
- Low power consumption
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Specifications:
| FORMATTED CAPACITY (GB) |
18.21 |
| AVERAGE SECTORS PER TRACK |
303 rounded down |
| ACTUATOR TYPE |
ROTARY VOICE COIL |
| TRACKS |
117,210 |
| CYLINDERS |
11,721 user |
| HEADS (PHYSICAL) |
10 |
| DISCS (3.5 in) |
5 |
| MEDIA TYPE |
THIN FILM/MR |
| RECORDING METHOD |
PRML 16/17 EPR4 |
| INTERNAL TRANSFER RATE (mbits/sec) |
137 to 240 |
| EXTERNAL TRANSFER RATE (mbyte/sec) |
40 Sync |
| Low Voltage Differential(LVD) |
80 Sync |
| SPINDLE SPEED (RPM) |
7,200 |
| AVERAGE LATENCY (mSEC) |
4.17 |
BUFFER (/optional)
Read Look-Ahead, Adaptive, Multi-Segmented Cache |
1024/4096 KByte |
| INTERFACE |
Ultra2 SCSI
ASA II, SCAM level 2 (1 default) |
| BYTES PER TRACK |
186 KByte avg |
| SECTORS PER DRIVE |
35,566,480 |
| TPI (TRACKS PER INCH) |
12,580 |
| BPI (PEAK KBITS PER INCH) |
223 |
AVERAGE ACCESS (ms read/write)
Drive level without controller overhead |
6.9/7.7 |
| SINGLE TRACK SEEK (ms read/write) |
0.9/1.2 |
| MAX FULL SEEK (ms read/write) |
15/16 |
| MTBF (power-on hours) |
1,000,000 |
| POWER REQUIREMENTS: |
+12V START-UP (amps) _1.6
+12V TYPICAL (amps) __0.5 idle
+5V START-UP (amps) __1.05
+5V TYPICAL (amps) ___0.75 idle |
| LANDING ZONE (cyl) |
AUTO PARK |
| 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 |
Product Content:
- Seagate ST318275LC 18.2GB Ultra2 SCSI 7200RPM 80-Pin Hard Drive
- - SOFTWARE NOT INCLUDED -
Before you purchase this item, please ensure that you have verified compatibility with system by visiting the manufacturer's web site.
We assume no responsibility and will not accept full refunds for items purchased that are not compatible with your system configuration.
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Conditions:
Warranty:
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