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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:
•
Average seek time is determined by averaging the time to complete 1,000 seeks of random length.
•
Average latency is the time required for the drive to rotate 1/2 of a revolution and on average is
incurred after a seek completion prior to reading or writing user data.
•
Startup time is the time elapsed between the supply voltages reaching operating range and the
drive being ready to accept all commands.
•
Actual rotational speed can be different a little.
•
Performance specification is limited to the room temperature & normal voltage condition.
Table 2: Typical seek times
Typical seek times (ms)
Average
Average latency
Seek time is defined as the time from the receipt of a read, write or seek command
until the actuator has repositioned and settled on the desired track with the drive
Note
operating at nominal DC input voltages and nominal operating temperature.
2.7
Start/stop times
Table 3: Start/stop times
Capacity
Typical seek times (ms)
Power-on to ready (sec)
Standby to ready (sec)
Seagate BarraCuda Product Manual, Rev. J
Read/Write
14.0/14.0
5.6
5TB and 4TB models
Typical
7.5
6.5
10
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