K 10 svn:author V 8 cperciva K 8 svn:date V 27 2011-05-03T16:36:39.074537Z K 7 svn:log V 202 MFC r221049: Stop zeroing UFS1 superblocks if we fall off the end of the disk, in order to avoid wasting time (potentially many hours) in the event that we find a partially-overwritten UFS1 superblock. END