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3.5
Recording and interface technology
Interface
Recording method
Recording density BPI (bits/in avg)
Track density TPI (tracks/in avg)
2
Areal density (Gb/in
avg)
Spindle speed (RPM) (± 0.2%)
Maximum Internal transfer rate (Mb/s)
I/O data-transfer rate (Gb/s max)
Interleave
Cache buffer
3.6
Physical characteristics
Drive specification
Height
(mm)
(in)
Width
(mm)
(in)
Length
(mm)
(in)
Weight (max)
All models
3.7
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 average of at least 5000 measurements of seeks between
random tracks, less overhead.
Table 2:
Typical seek times
Typical seek times (ms)
Track-to-track
Average
Average latency
These drives are designed to consistently meet the seek times represented in this manual. Physical
Note.
seeks, regardless of mode (s uch as track-to-track and average), are expected to meet the noted
values. However, due to th e 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.
Momentus Thin Product Manual, Rev. E
4K sector models
Serial ATA (SATA)
16MB (16,384 KB)
6.8 +/-0.2
0.268 +/-0.0079
69.85 +/-0.25
2.75 +/-0.0098
100.35 +0.20/-0.25
3.951 +0.008/-0.010
92.0 g
0.203 lb
Read
1.5
11
5.6
Perpendicular
1397k
315k
425
5400
1044
3.0
1:1
7
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