Snapshots maintenance

[Francisco Reyes]

Siju George writes:

 snaprm path ...
Got an error:
hammer snaprm snap-20110101-0301
Warning: hammer snaprm 0x0000000104a207b0: meta-data not found
The link was deleted anyway.

after pruning you need to reblock to gain space
Tried
hammer reblock /
Got

reblock start 8000000000000000:0000 free level 0
Reblock / failed: Input/output error
Reblocked:
   0/0 btree nodes
   0/0 data elements
   0/0 data bytes