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10 Momentus 5400.6 SATA Product Manual, Rev. E
2.6 Physical characteristics
Drive specification
Height (mm)
(inches)
9.5 +/-0.2
0.374 +/-0.0079
Width (mm)
(inches)
69.85 +/-0.25
2.75 +/-0.0098
Length (mm)
(inches)
100.35 +0.20 / -0.25
3.957 +0.0079 / -0.0098
Weight (max)
ST9500325AS
ST9500325ASG
ST9400326AS
ST9320325AS
ST9320325ASG
ST9250315AS
ST9250315ASG
ST9160314AS
ST9160314ASG
ST9120315AS
ST9120315ASG
ST980313AS
ST980313ASG
ST9160301AS
98.8 grams
0.218 pounds
93.5 grams
0.206 pounds
105 grams
0.23 pounds
2.7 Seek time
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using
drive diagnostics. The specifications in the table below are defined as follows:
• Track-to-track seek time is an average of all
possible single-track seeks in both directions.
• Average seek time is a true statistical random avera
ge of at least 5,000 measurements of seeks between
random tracks, less overhead.
Table 4: Typical seek times
Seek times (msec) Read
Track-to-track (typical) 1
Average (typical) 14
Full-stroke (max) 30
Average latency 5.56
Note. These drives are designed to consistently meet the seek times represented in this manual. Physical
seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted
values. However, due to the manner in which these drives are formatted, benchmark tests that
include command overhead or measure logical seeks may produce results that vary from these
specifications.
2.8 Start/stop times
Time to ready Typical
Max @ 25
°C
Power-on to Ready (sec) 3.6 3.8
Standby to Ready (sec) 1.8 2