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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 the
ST9120821SB, ST9100824SB, ST98823SB, ST96812SB, ST94813SB and ST93811AS models.
2.1
Specification summary table
The specifications listed in this table are for quick reference. For details on specification measurement or defi-
nition, see the appropriate section of this manual.
Table 1:
Drive specifications
Drive specification
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
Physical read/write heads
Discs
Recording density in BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Mbits/inch
max)
Spindle speed (RPM)
Internal transfer rate (Mbytes/sec max)
I/O data transfer rate (Mbytes/sec max)
ATA data-transfer modes supported
Cache buffer
Height (max)
Width (max)
Length (max)
Weight (typical)
Average latency (msec)
Power-on to ready (typical)
Standby to ready (typical)
Startup current, (typical, peak)
Momentus 5400.2 SATA Blade Server Product Manual, Rev. B
ST9120821SB ST9100824SB ST98823SB
120
100
234,441,648
195,371,568
512
63
16
16,383
4
4
2
2
778k
126k
98.2
5,400
42
150
SATA 1.0, SATA II
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
8 Mbytes
9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
69.85 mm (2.75 +/- 0.0098 inches)
100.5 +/- 1.6 mm (3.96 +/- 0.063 inches)
100 grams (0.22 lb)
5.56
3.5 sec
3.0 sec
+5V: 1.1A
ST96812SB
80
60
156,301,488
117,210,240
3
2
2
1
ST94813SB
40
78,140,160
2
1
3
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