On Fri, 28 Apr 2000, Benno Senoner wrote:
...
> Sorry , I am not very up to date:
>
> do you plan both, an increase of the individual partitions,
> and resizing by adding more disks ?
I mostly thought of just adding more disks. But resizing partitions
ought to be fairly straight forward. Of course, for RAID-0 you might
want to grow some partitions and shrink others, which will require
similar magick to what the tool does now when just adding disks.
>
> That would be too cool, having for example a 4 disks soft-RAID5 array
> and when you run out of space, add one more disk, and let the resize
> tool
> recalculare all parities etc, in order to take the fifth disk into
> account.
Yes, it would be cool. Now I don't plan very much with this utility.
I'm going to continue work on it as time permits, or support anyone
who's willing to take to ball from here, again as time permits.
I really really hope that I'll be able to make this tool work with
the other levels sometime in the not too distant future. But right
now I'm just too bogged down with other work.
>
> Is that possible form a pratical POV ?
Absolutely.
The real trick is to make it fairly efficient too. The first version
of the tool was very simple, and _very_ slow. The trick is to minimize
the number of seeks done on the drives when moving blocks around.
Ideally the system would have either 200G of memory, or a separate
``spool'' disk :)
Resizing raids is very simple, conceptually. But resizing them in
reasonable earth-time is harder.
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