hold on a sec ...
http://www.blastwave.org/docs/step-063.html
That thing there is my principal sin ?
What if I were to back up a few steps to here :
http://www.blastwave.org/docs/step-061.html
Then I diverge the path into two alternate methods for setting up the
disk.
wdyt ?
What's "wdyt"?
Anyways, what I'm about to describe has happened to me, and has a tendency
to happen often to others.
You have /, /opt/, /var and /export/home. The disk is, shall we say, 36GB?
You could take any size really.
What happens is that / is 63% full, /opt is 21% full, meanwhile /export/home
is at 95% and /var is at 98%.
What's the problem here? Well, several:
1. the slices weren't sized properly to begin with -- but other than a "gut
feel" measure, there is no empirical method to determine the optimal sizes;
therefore, it's unreliable at best;
2. now that certain slices are nearing their capacity, reslicing the disk
again is going to be a careful and complicated dance macabre; not exactly
something that an experienced sysadmin should get stuck with; it's like
getting caught with one's pants down;
3. the way both you and me (in the above example) sliced up the disk, it is
not possible to mirror the disk or the slices -- neither of the scenarios
makes it possible or easy to do mirroring down the road.
To do 3., you'd have to do a `find + cpio` to the second disk, plus create
mount points for the pseudo file systems... can it be done? Sure, but it
requires extreme caution -- one wrong step and the system won't come back
up. More precious time lost, often because of a trivial oversight.
Can 3. be performed by a newb? I don't believe that's a bet anyone should be
forced to take.
Now those are just top three reasons why slicing up the disk into
filesystems is exactly the opposite of flexible -- it's inflexible to the
extreme. There are more reasons, but it's early morning and I'm really
tired, so I'll just leave it at that.
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