| Functional Specifications |
| Formatted storage capacity |
20 GB |
| Form Factor |
2.5-inch x 9.5mm |
| Mounting screws |
#6-32UNC |
| Disks |
2 |
| Heads (read/write) |
3 |
| Track capacity (formatted) |
199,680 to 353,280 bytes |
| Bytes per sector |
512 bytes |
| Cylinders |
35,968 |
| Sectors per track |
390 to 690 |
| Seek time (track to track) |
1.5 typ. milliseconds |
| Seek time (average) |
12 typ. milliseconds (read/write) |
| Seek time (full track) |
22 typ. milliseconds (read/write) |
| Average latency time |
7.14 milliseconds |
| Rotational speed |
4,200 RPM |
| Recording density |
592,000 bits per inch |
| Track density |
61,500 tracks per inch |
| Data transfer rate (to/from media) |
18.4 to 32.5 MB per second |
| Data transfer rate (to/from media) |
147.2 to 260.0 megabits per second |
| Data transfer rate (DMA mode 2) |
16.6 MB per second |
| Data transfer rate (PIO mode 4) |
16.6 MB per second |
| Data transfer rate (UDMA mode
2) |
33.3 MB per second |
| Data transfer rate (UDMA mode
4) |
66.6 MB per second |
| Data transfer rate (UltraATA) |
100 MB per second |
| Recording code |
48/50 MEEPRML |
| Interface |
ATA - 5 |
| Head positioning method |
Rotary VCM Embedded Servo |
| Spindle start time |
5 seconds typical |
| Spindle stop time |
5 seconds typical |
| Data buffer size |
2048 KB |
| Physical Specifications |
| Power requirement Voltage |
5V ± 0.5% |
| Ripple |
100 mV P-P |
| Power requirement Spin up |
0.90A maximum |
| Power requirement Read/write |
2.3 W (typical) |
| Power requirement Idle (ready) |
0.65 W (typical) |
| Power requirement Sleep |
0.1 W (typical) |
| Height |
9.5 millimetres |
| Width |
70 millimetres |
| Depth |
100 millimetres |
| Weight |
0.098 kg |
| Ambient temperature (operating) |
5 to 55 degrees C |
| Ambient temperature (non-operating) |
-40 to 65 degrees C |
| Gradient |
20 degrees C per hour |
| Relative humidity (operating) |
8 to 90 % RH (non-condensing) |
| Relative humidity (non-operating) |
5 to 95 % RH (non-condensing) |
| Maximum wet bulb |
29 (Op.)/ 40 (Non Op.) degrees C (non-condensing) |
| Vibration (operating) |
9.8m/s^2 (1.0G) (5 to 400Hz) |
| Vibration (non-operating) |
49m/s^2 (5.0G) (5 to 500Hz) |
| Shock (operating) |
1,715m/s^2 (200G) 2ms |
| Shock (non-operating) |
7,840m/s^2 (900G) 1ms / 1,176m/s^2 (120G) 11ms |
| Altitude (operating) |
-300 to 3,000 metres |
| Altitude (non-operating) |
-300 to 12,000 metres |
| Acoustic noise (at 1 metre idle) |
24 dBA typical |
| Acoustic noise (at 1 metre idle) |
2.6 bels |
| Reliability Specifications |
| MTBF (Mean Time Between Failures) |
More than 300,000 power on hours |
| MTTR (Mean Time To Repair) |
30 minutes or less |
| Component life (years) |
5 years |
| Component life (hours) |
20,000 power on hours |
| Unrecoverable errors |
1 per 10^13 bits read |
| Seek errors |
1 per 10^6 seeks |
| Start/stop cycles |
300,000 cycles |
