After a power cycle, the machine comes up with error messages saying: corrupt label - label checksum failed or corrupt label - wrong magic number . format(1M) showed:
0 unassigned wm 0 0 (0/0/0) 0 1 unassigned wm 0 0 (0/0/0) 0 2 backup wm 0 - 5460 4.2G (5460/0/0) 4154160 3 unassigned wm 0 0 (0/0/0) 0 4 unassigned wm 0 0 (0/0/0) 0 5 unassigned wm 0 0 (0/0/0) 0 6 unassigned wm 0 - 2730 2.1G (0/0/0) 0 7 unassigned wm 2730-5460 2.1G (0/0/0) 0 |
The disk label (VTOC) is kept on the block 0 of cylinder 0. The label will eventually get overwritten by database programs using raw partitions if the raw partition begins at cylinder 0. (Unix filesystems avoid this area of the partition.)