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2.0
Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate
ST9120826A, ST9100826A, ST980821A, ST960814A, and ST940811A model drives.
2.1
Specification summary
The specifications listed in this table are for quick reference. For details on specification measurement or
definition, see the appropriate section of this manual.
Table 1:
Specifications
Drive specification
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
Bytes per sector
Physical read/write heads
Discs
Cache (Mbytes)
Recording density,
BPI (bits/inch typical)
Track density.
TPI (tracks/inch typical)
2
Areal density (Gbits/inch
max)
Spindle speed (RPM)
Internal data transfer rate OD
(Mbytes/sec max)
I/O data-transfer rate
(Mbytes/sec max)
ATA data-transfer
modes supported
Height
Width
Length
Weight (typical)
Average latency (msec)
Power-on to ready (sec typical)
Standby to ready (sec typical)
Startup current 5V (typical)
Track-to-track seek time
(msec typical)
Average seek time (msec typical)
Average seek, read (msec typical)
Momentus 5400 FDE Product Manual, Rev. C
ST9120826A
ST9100826A
120
100
234,441,648
195,371,568
512
4
4
2
2
8
778,000
126,000
98.2
5,400
42
100
PIO modes 0–4
Ultra DMA modes 0–5
9.5 +/-0.2 mm (0.374 +/-.008 inches)
69.85 +/-0.25 mm (2.750 +/-0.010 inches)
100.2 +/-0.25 mm (3.945 +/-0.010 inches)
100 grams (0.22 lb)
5.6
3.5
3.0
1.0 amps
1.0 (read), 1.5 (write)
12.5
12.5
ST980821A
ST960814A
80
60
156,301,488
117,210,240
3
2
2
1
ST940811A
40
78,140,160
2
1
5
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