Guys,
Thanks for the replies. Sorry I should have been clearer on the
question.
The problem I have is that SDB is not producing the block sizes I, or more
importantly my management, expect. Now it could be my understanding that is
wrong or it could be that SDB is not getting it right, or, most likely in
my opinion, hasn't enough information to make the 'correct' decision.
We've been using SDB for some time. Some of the blocksizes it produces
would be bad choices for a 'real' 3390 but we didn't care while under RVA
because only the data was put onto real disk, we assumed this wastage of
3390 space was deliberate because there was no real correlation between
3390 space and RVA disk space. Now that we are on ESS/Shark, where I
believe the whole volume is mapped to disk, it is more important to get the
blocksize right, both for performance and capacity.
I'm looking for guidelines to determine if SDB is getting it right.
Regards, Ron MacRae
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