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Seagate Desktop HDD Product Manual, Rev. A 9
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.
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
6TB & 5TB 780g / 1.72 lb
4TB 610g / 1.35 lb
Cache buffer
6TB & 5TB 128MB
4TB 64MB
Models
ST6000DM001,
ST5000DM002
ST4000DM000
Typical seek times (ms) Read Write Read Write
Track-to-track 1.0 1.2 1.0 1.2
Average 8.5 9.5 12.0 12.0
Average latency 4.0 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.
Models
ST6000DM001,
ST5000DM002
ST4000DM000
Power-on to ready
(in seconds)
23 (typical)
30 (max)
15 (typical)
18 (max)
Standby to ready
(in seconds)
23 (typical)
30 (max)
15 (typical)
18 (max)
Ready to spindle stop
(in seconds)
23 (max) 11 (max)