I fixed the corrupted database.
Now I have less disk space.
What now??
/tool user-manager> database clear
Dangerous! Reset whole user-manager database (except logs)? [y/N]:
y
Resetting user-manager database
user-manager database cleared
/tool user-manager> database print
size: 75 kB
in-use: 100 %
log-size: 8198 kB
log-in-use: 100 %
last-clear: apr/03/2011 01:43:28
/tool user-manager> database
clear clear-log get load load-logs print rebuild save save-logs
/tool user-manager> database load name=Database.umb
Restore user-manager database? [y/N]:
y
Loading user-manager database backup
user-manager database restored
/system resource> pr
uptime: 8h33m53s
version: "5.0"
free-memory: 448076KiB
total-memory: 516552KiB
cpu: "e500v2"
cpu-count: 1
cpu-frequency: 1333MHz
cpu-load: 4%
free-hdd-space: 4932KiB
total-hdd-space: 61440KiB
write-sect-since-reboot: 2363582
write-sect-total: 484458079
bad-blocks: 0.3%
architecture-name: "powerpc"
board-name: "RB1000"
platform: "MikroTik"