Seagate BarraCuda Product Manual, Rev. H
10
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.
2.7
Start/stop times
Table 2: Typical seek times
Typical seek times (ms)
Read/Write
Average
14.0/14.0
Average latency
5.6
Note
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
operating at nominal DC input voltages and nominal operating temperature.
Table 3: Start/stop times
Capacity
5TB, 4TB and 3TB models
Typical seek times (ms)
Typical
Power-on to ready (sec)
7.5
Standby to ready (sec)
6.5
