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2.2
P
HYSICAL ORGANIZATION
Drive model
ST500UM000
ST320UM000
2.3
R
ECORDING AND
Interface
Recording method
Recording density
Track density
Areal density
Spindle speed
Sustained data transfer rate
I/O data-transfer rate
2.4
P
C
HYSICAL
HARACTERISTICS
Height
Width
Length
All models
Typical weight
Cache buffer
2.5
S
EEK 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
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
N
OTE
include command overhead or measure logical seeks may produce results that vary from these
specifications.
S
L
T
SSHD P
EAGATE
APTOP
HIN
Read/write heads
2
I
T
NTERFACE
ECHNOLOGY
Serial ATA (SATA)
Perpendicular
1894 Kb/in
375 ktracks/in avg
2
705 Gb/in
avg
5400 RPM +/- 0.2%
100 MB/s max
600 MB/s max
6.8 +/- 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)
95 g (0.209 lb)
64 MB (64,768 KB)
Read
2.0
12.0
5.6
M
, R
RODUCT
ANUAL
EV
Number of discs
1
. B
D
S
RIVE
PECIFICATIONS
5
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