While dealing with a pull-the-plug scenario for
an embedded linux pump controller, I have browsed
this news group for some answers.
My idea was, and was also mentioned in a few postings,
to have the file system mounted ro and have all data stored
in a ram disk. At a specific time interval, the disk is remounted
rw and the data is written down to disk. The disk is then again mounted ro.
We can live with the risk of a shutdown in the writing phase, no
problem. But still there are some questions:
which parts of the file structure must be rw? Is /dev and /var enough?
Mount wont let me remount the disk -> ro after disk writes. Do you have
to do this in a special way or what?
magnus oe
________________________
.magnus ohrstrom
.Flygt MST division
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