There was a problem on the data pool.
We put the data in readonly in order to find a solution.

Update(s):

Date: 2011-12-31 04:07:40 UTC
New accounts will be available to allow continuity of backups.

A mailing will be sent to affected customers.

The original data remains accessible on readonly.

Date: 2011-12-23 19:51:14 UTC
After several attempts, we still have a kernel panic when we try to reactivate thr writings.
We're trying an upgrade and a pool analysis.

The data are always available in readonly.