FUJITSU MCJ3230SS - Manual (Page 83)

4.2 Various Processes
C156-E224-01EN 4-9
4.2.7 LED indications
The ODD notifies the operator of a serious error by turning on or blinking an
LED. Table 4.2 lists the LED indications and the corresponding operations.
Table 4.2 LED indications
LED indication Operation
Off Waiting for a command
Command processing
Seek operation
Read/write processing (including cache
processing)
Formatting
Power-on diagnosis
Spinning up (including returning from standby
mode)
On
Spinning down (including shifting to standby
mode)
Blinking
(on for 0.1 s and off for 0.7 s repeatedly) Starting firmware dedicated to downloading *1
Blinking
(on for 0.1 s and off for 0.1 s repeatedly) A power-on diagnosis error occurred.
Blinking
(on for 0.4 s and off for 0.4 s repeatedly) A thermal alarm occurred.
Blinking
(on for 0.1 s and off for 0.3 s repeatedly) An error occurred during writing to the write
cache *2.
*1 ODD control firmware is stored in flash ROM and can be downloaded from
the host with the WRITE BUFFER command. However, if a problem such
as a power failure occurs during downloading, downloading is interrupted
and the microcodes in the control firmware may be damaged. In such a
case, to download the microcode data again, the ODD starts emergency
download firmware that supports only the WRITE BUFFER command and
other basic commands.
*2 The LED that is blinking because of a write cache write error stops blinking
when the media is ejected.