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Seagate Desktop HDD Product Manual, Rev. B 6
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 are listed below.
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 655g / 1.44 lb
Cache buffer 128MB
Typical seek times (ms) Read Write
Track-to-track 1.0 1.2
Average 12.0 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)
19 (typical)
22 (max)
Standby to ready
(in seconds)
15 (typical)
17 (max)
Ready to spindle stop
(in seconds)
10 (typical)
11 (max)