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2.5
Physical characteristics
Maximum height
3TB model
2TB model
1TB model
Maximum width
Maximum length
Typical weight
3TB model
2TB model
1TB model
Cache buffer
2.6
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.
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.
Note
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.
Seagate Surveillance +SRS HDD Product Manual, Rev. D
3TB & 2TB
Read
Write
<1.0
<1.2
<8.5
<9.0
5.1
5.1
26.1mm / 1.028 in
20.20mm / 0.795 in
101.6mm / 4.0 in (± 0.010 in)
147.00mm / 5.78 in
626g /1.38 lb
535g / 1.18 lb
415g / 0.915 lb
64MB (65,536kb)
1TB
Read
Write
<1.0
<1.2
<8.5
<9.0
5.1
5.1
10
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