Seagate Surveillance HDD Product Manual, Rev. A
7
www.seagate.com
Drive Specifications
2.5
Physical characteristics
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.
2.7
Start/stop times
The start/stop times listed below are for 3TB and 4TB models.
Time-to-ready may be longer than normal if the drive power is removed without going through normal OS
powerdown procedures.
Maximum height
26.11mm / 1.028 in
Maximum width
101.6mm / 4.0 in (± 0.010 in)
Maximum length
146.99mm / 5.787 in
Typical weight
610g / 1.345 lb
Cache buffer
64MB
Typical seek times (ms)
Read
Write
Track-to-track
1.0
1.2
Average
<12.0
Average latency
5.1
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.
Power-on to ready (in seconds)
15 (typical) / 17 (max)
Standby to ready (in seconds)
15 (typical) / 17 (max)
Ready to spindle stop (in seconds)
10 (typical) / 11 (max)
