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6
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
Summary of Contents for ST920813AM
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