Execution Timing Of Self-Calibration; Command Processing During Self-Calibration; Self-Calibration Execution Timechart - Fujitsu MPA3017AT Product Manual

4.5.2

Execution timing of self-calibration

Self-calibration is executed when:
The power is turned on.
The disk drive receives the RECALIBRATE command from the host.
The self-calibration execution timechart of the disk drive specifies self-calibration.
The disk drive performs self-calibration according to the timechart based on the time elapsed from
power-on. The timechart is shown in Table 4.1. After power-on, self-calibration is performed
about every five or ten minutes for the first 60 minutes or six RECALIBRATE command
executions, and about every 30 minutes after that.
1
2
3
4
5
6
7
.
.
.
9
4.5.3

Command processing during self-calibration

If the disk drive receives a command execution request from the host while executing self-
calibration according to the timechart, the disk drive terminates self-calibration and starts
executing the command precedingly. In other words, if a disk read or write service is necessary,
the disk drive positions the head to the track requested by the host, reads or writes data, and
restarts calibration.
This enables the host to execute the command without waiting for a long time, even when the disk
drive is performing self-calibration. The command execution wait time is about maximum 100 ms.
Table 4.1

Self-calibration execution timechart

Time elapsed
At power-on
About 5 minutes
About 5 minutes
About 10 minutes
About 10 minutes
About 30 minutes
Every about 30 minutes
C141-E034-02EN
Time elapsed (accumulated)
Initial calibration
About 5 minutes
About 10 minutes
About 20 minutes
About 30 minutes
About 60 minutes
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