Rick,

>So to restore an 11GB database we should have 22GB available where

TempDirectories points?

No.
Download our free tool DBInfo
(http://ib-aid.com/products/firebird_interbase/monitoring/dbinfo) and
open your database there.
Look at Index Pages size. If you have the single table with the single
index in the database, it will be close to the size you need to have in
Temp, otherwise it will be less (during restore indices are being built
one by one).

Detailed breakdown for each index you can figure out by investigating
gstat -r statistics (or look at IBAnalyst to have it visualized):
http://www.ib-aid.com/images/ibanalyst_index_size.png

Regards,
Alexey Kovyazin
IBSurgeon (www.ib-aid.com)

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