On Sun, Sep 19, 1999 at 02:52:27PM -0400, James Manning wrote:
> In terms of possible future legacy problems, if you have any data slots
> in your superblock for such tuning parameters, future raid patches
> will have to respect that slot as taken from here on out... if param
> "foo" was taking bytes x..x+7 in the superblock, we can't put "bar"
> there in the next patch (where we figure out "foo" wasn't really needed,
> or that there's a setting that's always the Right Thing To Do), as
> superblocks created by previous raid patches won't recognize that...
...unless you include a version number in one field, in which case you
just need to know how to read previous versions, but are free to define
a new version that doesn't have certain deprecated values.
Pretty standard tactics when coding this kind of thing.
--
Elie Rosenblum That is not dead which can eternal lie,
http://www.cosanostra.net And with strange aeons even death may die.
Admin / Mercenary / System Programmer - _The Necronomicon_
