Jetter JC-120MC, Руководство пользователя

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156 Jetter AG
6 File system
Checking the SD card
In the following cases, checking the SD card for faults is required:
 When the device was switched off during access to the SD card

All files and directories on the SD card will be checked and errors, if any,
will be fixed.
Following such a check, the administrative structures on the SD card will
be in consistent condition.
 Depending on the SD card size and the number of files and directories the
boot process duration of the JC-120MC may extend to several minutes.
To have the device check the SD card, proceed as follows:
Step Action
1
Switch the device ON.
2 Enter value 748371092 (0x2c9b3c94) into the control register 202936 of
the file system.
3 Switch the device OFF.
4 Switch the device ON.
Result: While booting, the device checks the SD card. The value in the control
register remains unchanged so that the card is checked whenever the
JC-120MC is rebooted.
This function repairs the administrative structures on the SD card in order that
it can be used further. However, it may happen that the device cannot restore
in all cases data of a file, which, for example, has been written incompletely.
Introduction
Consequences
Checking the SD card
Restrictions