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EE25 Series Product Manual, Rev. E
Table 2: Specifications for 20 Gbyte models
Drive specification
ST920813AM
(OEM)
ST920814AM
(Aftermarket)
Formatted (512 bytes/sector)* 20 Gbytes
Guaranteed sectors 39,070,080
Bytes per sector 512
Physical read/write heads 1
Discs 1
Cache 8 Mbytes
Recording density, BPI 540.1k bits/inch at ID
Track density. TPI 119k tracks/inch at ID
Areal density 64.3 Gbits/inch
2
at ID
Spindle speed 5,400 RPM
Internal data transfer rate 321.1 Mbits/sec max
I/O data transfer rate 100 Mbytes/sec
ATA data-transfer modes supported PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.2 +/-0.25 mm (3.945 +/-0.010 inches)
Weight 100 grams (0.22 lb) (typical)
Average latency 5.6 msecs
Power-on to ready
-20 to 85°C)
-30 to -20°C
3 sigma maximum at extreme temperature
3.0 seconds (typical)
15 seconds (typical)
30 seconds
Standby to ready
-20 to 85°C
-30 to -20°C
3 sigma maximum at extreme temperature
3.0 seconds (typical)
15 seconds (typical)
30 seconds
Track-to-track seek time 1.0 msec (read, typical), 1.5 msec (write, typical)
Average seek time 12.5 msec (typical)
Average seek, read 12.5 msec (typical)
Average seek, write 14.5 msec (typical)
Full-stroke seek 22 msec (typical); 24 msec (max)
Startup current 5V 1.1 amps (typical)
Seek power 1.90 watts / 0.38 amps (typical)
Read power 1.90 watts / 0.38 amps (typical)
Write power 1.70 watts / 0.34 amps (typical)
Idle mode 0.99 watts / 0.20 amps (typical)
Standby mode 0.26 watts / 0.05 amps (typical)***
Sleep mode 0.26 watts / 0.05 amps (typical)***
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature
Operating
Nonoperating
-30° to 85°C (OEM); -20° to 75°C (aftermarket);
–40° to 95°C (OEM and aftermarket)
Temperature gradient 3°C per minute, noncondensing (operating)
3°C per minutes, max, noncondensing (nonoperating)
Relative humidity (noncondensing) 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max