Hi guys.

It seems that one of our customers has a corrupted BTree. I would love
for someone to provide some insight on how we can recover the data.

we have two databases: 1 for resources and 1 for 'content'.  resources
contain lots of very big files.

The system is configured to have a mount point at /plone/resources is
a subclass of BTreeFolder, using internal data struct of OOBTree.

anytime I iterate over the keys I get POSKeyError.  anytime I iterate
over the values the same.  if I run BTree.check() on the data
structure's tree attribute (the OOBTree itself) I get a POSKeyError.

Running the utils.checkbtrees doesnt say this btree has a problem.

While debugging this I had a conversation with sidnei about mounted
databases.  He recalled that if your using a mounted database you
should not pack.  If for some reason your mounted database had a cross
reference to another database and somehow you had a dangling reference
to the other database it would cause POSKeyError.

Is there any other ways of "testing consistency" of FileStorage other than:
  - checkbtrees.py
  - fstest.py

And any ideas how I can salvage the data? This BTree, of course, had
the most valuable data.


Alan Runyan
Enfold Systems, Inc.
phone: +1.713.942.2377x111
fax: +1.832.201.8856
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