求救！！！机器突然断电，postgres回滚出现错误

lhq_hs

请问下面的问题如何解决：sco unix 5.0.5环境，postgres7.3
   突然断电, 数据库不能启动了
[/usr/postgres/data]=>;pg_ctl start
LOG: database system was interrupted being in recovery at 2005-01-18 17:40:06 CST
This probably means that some data blocks are corrupted
and you will have to use the last backup for recovery.
LOG: checkpoint record is at 0/7C19E64C
LOG: redo record is at 0/7C19E64C; undo record is at 0/0; shutdown FALSE
LOG: next transaction id: 3041910; next oid: 1019812
LOG: database system was not properly shut down; automatic recovery in progress
postmaster successfully started
[/usr/postgres/pgsql/data]=>;LOG: redo starts at 0/7C19E68C
PANIC: Invalid page header in block 1648 of 18548
LOG: startup process (pid 681) was terminated by signal 6
LOG: aborting startup due to startup process failure

digo

做过vacuum了吗？一般断电后需要做vacuum把数据库整理一下。