Seagate Desktop SSHD Product Manual, Rev. K
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.
Maximum height
4TB and 2TB
26.1mm / 1.028 in
1TB
20.17mm / 0.7825 in
Maximum width (all models)
101.6mm / 4.0 in (± 0.010 in)
Maximum length (all models)
146.99mm / 5.787 in
Typical weight
4TB
610g / 1.345 lb
2TB
535g / 1.18 lb
1TB
400g / 0.88 lb
Cache buffer
64MB (64,768kb)
Typical seek times (ms)
Read
Write
Track-to-track
1.0
1.2
Average
8.5
9.5
Average latency
4.16
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.
