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SEAGATE ULTRA MOBILE SSHD PRODUCT MANUAL, REV. D 6
DRIVE SPECIFICATIONS
2.2 PHYSICAL ORGANIZATION
Drive model Read/write heads Number of discs
All models 2 1
2.3 RECORDING AND INTERFACE TECHNOLOGY
Recording method Perpendicular
Recording density 1885 Kb/in
Track density 366 ktracks/in avg
Areal density 690 Gb/in
2
avg
Spindle speed 5400 RPM +/- 0.2%
Sustained data transfer rate 100 MB/s max
I/O data-transfer rate 600 MB/s max
2.4 PHYSICAL CHARACTERISTICS
Height
5.0 +/- 0.2 mm (0.197 +/-.008 in) (Standard models)
5.2 +/- 0.2 mm (0.205 +/-.008 in) (FIPS models only)
Width 69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
Length 100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)
Typical weight 93 g (0.205 lb)
Cache buffer 64 MB (64,768 KB)
2.5 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.
Interface Serial ATA (SATA)
All models
Table 2 Typical seek times
Typical seek times (ms) Read
Track-to-track 1.5
Average 13.0
Average latency 5.6
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.