Execution Timing Of Self-Calibration; Command Processing During Self-Calibration; Self-Calibration Execution Timechart - Fujitsu MPD3XXXAT 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 30 minutes.
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.
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.
maximum 100 ms.
4 - 10
Table 4.1

Self-calibration execution timechart

Time elapsed
At power-on
About 30 minutes
About 30 minutes
About 30 minutes
About 30 minutes
About 30 minutes
Every about 30 minutes
In other words, if a disk read or write service is
C141-E069-02EN
Time elapsed (accumulated)
Initial calibration
About 30 minutes
About 60 minutes
About 90 minutes
About 120 minutes
About 150 minutes
The command execution wait time is about