db2出错了，大家帮忙看看

昨天的系统还正常，今天就出错了，并标记为数据库为“bad"
$db2start很正常
$db2stop也很正常

$ db2 connect to sample
SQL1013N  The database alias name or database name "SAMPLE" could not be
found.  SQLSTATE=42705
$


2006-08-11-09.58.08.650638+540 E2120794C377       LEVEL: Severe
PID     : 29944                TID  : 1           PROC : db2agent (SAMPLE) 0
INSTANCE: db2inst1             NODE : 000         DB   : SAMPLE
APPHDL  : 0-22                 APPID: *LOCAL.db2inst1.060811005805
FUNCTION: DB2 UDB, base sys utilities, sqleMarkDBad, probe:10
[b][u]MESSAGE : ADM7518C  "SAMPLE  " marked bad.[/u][/b]

2006-08-11-09.58.09.162407+540 I2121172C425       LEVEL: Severe
PID     : 29944                TID  : 1           PROC : db2agent (SAMPLE) 0
INSTANCE: db2inst1             NODE : 000         DB   : SAMPLE
APPHDL  : 0-22                 APPID: *LOCAL.db2inst1.060811005805
FUNCTION: DB2 UDB, DRDA Application Server, sqljsSignalHandler, probe:10
MESSAGE : DIA0505I Execution of a component signal handling function has begun.

2006-08-11-09.58.09.195674+540 I2121598C167       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** DRDA ASCB ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.236113+540 I2121766C172       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** DRDA CMNMGR CB ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.237319+540 I2121939C172       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** RECEIVE BUFFER ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.238264+540 I2122112C170       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** SEND BUFFERS ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.239125+540 I2122283C175       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** CONNECTION HANDLE ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.240109+540 I2122459C173       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** DRDA ATTRIBUTES ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

2006-08-11-09.58.09.241016+540 I2122633C172       LEVEL: Severe
PID:29944 TID:1 NODE:000 Title: **** AS UCINTERFACE ****
Dump File:/home/db2inst1/sqllib/db2dump/299441.000

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