-recover space. Deleting an old backup snapshot is a simple matter of
-deleting the appropriate snapshot descriptor file (snapshot-*.lbs) and
-any associated checksums (snapshot-*.sha1sums). Segments used by that
-snapshot, but not any other snapshots, can be identified by running the
-clean-segments.pl script from the /lbs directory--this will perform a
-scan of the current directory to identify unreferenced segments, and
-will print a list to stdout. Assuming the list looks reasonable, the
-segments can be quickly deleted with
+recover space. A snapshot which is still referenced by the local
+database should not be deleted, however. Deleting an old backup
+snapshot is a simple matter of deleting the appropriate snapshot
+descriptor file (snapshot-*.lbs) and any associated checksums
+(snapshot-*.sha1sums). Segments used by that snapshot, but not any
+other snapshots, can be identified by running the clean-segments.pl
+script from the /lbs directory--this will perform a scan of the current
+directory to identify unreferenced segments, and will print a list to
+stdout. Assuming the list looks reasonable, the segments can be quickly
+deleted with