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2.0
Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power.
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 GB (512 bytes/sector)*
Guaranteed sectors
Bytes per sector
Physical read/write heads
Discs
Cache (MB)
Recording density in BPI (bits/in max)
Track density TPI (tracks/in max)
2
Areal density (Gb/in
max)
Spindle speed (RPM)
Average latency (ms)
Internal transfer rate (Gb/s max)
I/O data transfer rate (Gb/s max)
ATA data-transfer modes supported
Height (max)
Width (max)
Length (max)
Weight (max)
Power-on to ready (sec typical)
Standby to ready (sec typical)
Track-to-track seek time, read (msec typical)
Average seek, read (ms typical)
Average seek, write (ms typical)
Startup current, +5V amps (max)
Seek power (watts typical)
Momentus XT Product Manual, Rev. B
ST95005620AS
500
976,773,168
512
4
2
32
1,490k
265k
394
7200
4.17
1.23
3.0
SATA 1.0, Serial ATA Revision 2.6
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
9.5 +/- 0.2 mm (0.370 +/- .008 in)
69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
100.35 +0.20 / -0.25 mm (3.951 +0 .008 / -0.010 in)
110 g (0.238 lb)
4.5
3.0
1.5
11.0
13.0
1.0
2.2
ST93205620AS
320
625,142,448
3
ST92505610AS
250
488,397,168
2
1
105 g (0.227 lb)
3
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