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Quantum 'Atlas II, XP'
HN4550J 4.5GB
Specification
| Vendor |
Quantum |
| Range |
Atlas II, XP |
| Apricot Part Number |
PT15756331 |
| Form Factor |
3.5" 1" High |
| Weight |
0.63Kg |
| Formatted Capacity (x106 bytes) |
4552MB |
| Formatted Capacity (x220 bytes) |
4341.13 |
| Number of Platters |
5 |
| Number of Heads |
10 |
Performance
| Actuator |
Voice Coil |
| Positioning System |
Embedded |
| Average Access Time |
Read |
8.0ms |
| Write |
9.0ms |
| Single Track Seek Time |
Read |
0.9ms |
| Write |
0.9ms |
| Nominal Rotational Speed |
7200RPM |
| Average Rotational Latency |
4.17ms |
| Spin-up-Time (To Drive Ready) |
<30 secs |
| Maximum Sector Transfer Rate |
15.63MB/s |
| Typical Data Sector Transfer
Rate |
Maximum |
11.67MB/s |
| Minimum |
6.64MB/s |
| Numbers of Sectors / Track |
Maximum |
190 |
| Minimum |
108 |
| Type of Head Utilised |
MR |
| Read Channel Implementation |
Peak Detect |
| Encoding Method |
RLL (1,7) |
| SCA (80 pin) Connector |
Yes, SCA-2 |
| Wide '16-bit' SCSI Support |
Yes |
| UltraSCSI (Double SCSI) Support |
Yes |
| Maximum SCSI Burst Transfer Rate |
40MB/s Sync. |
| Cache Size |
Total |
512KB |
| Read Data |
512KB |
| Segmentation Type |
Adaptive |
| Continous Read Prefetch |
Yes |
| Write Cache |
Yes |
Environment
| Ambient operating
Temperature |
Minimum |
5°C |
| Maximum |
55°C |
| Maximum Thermal Gradient |
20°C/hr |
| Operating Shock, 0 Err's (G, 11ms) |
15G, ½ Sine |
| Operating Vibration (G, 5-300Hz) |
0.5G |
| Maximum Audible Noise (dbA @ 1m) |
41 dbA |
| Average Power Consumption |
Nominal Read / Write |
10.5W |
| Nominal Idle |
8.0W |
| DC Power Requirements |
+12V Startup Maximum |
1.85Amps |
| +12V Nominal Read / Write |
0.68Amps |
| +5V Seek Peek |
0.69Amps |
| +5V Nominal Read / Write |
0.45Amps |
| MTBF |
1,000,000 poh |
| Maximum Power On/Off Cycles |
>10,000 |
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