I've been tatting around with zdb for a while now and I've only just noticed that the ZFS developers have a "L33T" sense of humour.
Ever noticed what the "Uberblock" section of the output of "
zdb zpoolname" reports? Here's an excerpt from one of my pools:
[...] Uberblock magic = 0000000000bab10c version = 13 txg = 2450224 guid_sum = 2051813114395829123 timestamp = 1225469746 UTC = Fri Oct 31 16:15:46 2008 [...]
Noticed what the magic number says: 0000000000bab10c = OOOOOOberbloc = Uberblock. :-)