Quoting ger (gerdono at eircom.net):
> From man mount page
> sync All I/O to the file system should be done synchronously.
>> To me this means that all I/O operations occur at the same time. This
> should improve write speed. There is also an option call async which is the
> opposite. I cannot see how this option in mount will prevent or reduce data
> loss from unexpected disconnections during write operations.
The theory is that there are no delayed writes (write operations held in
a write-back cache buffer); therefore, you are not prone to fooling
yourself into thinking write operations to the device have completed
when they've merely been queued up.
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