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DYSK SCSI 18GB
80-PIN
Dysk Seagate ST118273LC 18GB SCSI 10k RPM 80-PIN
Description:
| Barracuda 18 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. |
Specifications:
| FORMATTED CAPACITY (GB) |
18.21 |
| AVERAGE SECTORS PER TRACK |
237 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 |
| 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) |
512KB/2MB
(LVD models /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 (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 |
| POWER REQUIREMENTS: |
+12V START-UP (amps) - 2.8
+12V TYPICAL (amps) - 0.8 idle
+5V START-UP (amps) - 1.2
+5V TYPICAL (amps) - 0.75 idle
IDLE (watts) - 13 |
| 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): 2.2/0.99 |
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