FAT Filesystem

Leon Pollak leonp at plris.com
Wed May 5 11:20:31 UTC 2010

On Wednesday May 5 2010, Wolfram Wadepohl wrote:
> To all specialists of the FAT filesystem and medis buffering:
> A power off at the wrong time can cause the filsystem to a inconsistent
> state. Is there a mechanism , like the UNIX sync command, to write buffers
> to disk and transfer all buffering to a safe state.
> How long does this take, esp. when using a CF/SD card.
> Thx.
To your last question.

Please, note, that even when you receive the acknowledge from the CF 
controller about write operation success completion, actually it does not 
mean, that the data was actually written into the flash memories. This only 
means that controller has accepted data and put it into its internal memory. 
You need to keep the power ON for the controller to finish the operation...:-)


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