Hi,
I've seen/read a number of articles on the net, about RAIDZ - and things
like Dynamic Striping et'al. I know roughly how this works - but I can't
seem to get to the bottom of expanding existing pool space, if this is even
possible.
e.g. If I build a RAIDZ pool with 5 * 400Gb drives, and later add a 6th
400Gb drive to this pool, will its space instantly be available to volumes
using that pool? (I can't quite see this working myself)
Other articles, talk about replacing one drive at a time, letting it
re-silver, and at the end when the last drive is replaced, the space
available to volumes will reflect the new pool size (i.e. replace each
400Gb device in turn with a 750Gb device - when the last one is done,
you'll have a 5 * 750Gb pool with all the space (minus RAIDZ overhead)
being available).
I know I can add additional RAIDZ pools to the volume - but that's only any
good for adding numbers of multiple drives, not singles (if you want to
continue fault tolerance).
Thanks,
-Karl
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