Database Software

Hi,
iam have configured a 2 node cluster and now when i rebooted and again started my rac database so all the applications are offline so i stop them with crs_stop and then restarted but my databases asm and instance service is not up so in that case i tried to connect to database or to instance but i was not able to so then i thought of connecting to asm instance and then the status is as follows


SQL> select name ,state ,mount_status from v$asm_disk ;

NAME STATE MOUNT_S
------------------------------ -------- -------
NORMAL CLOSED
NORMAL CLOSED
FG_0000 NORMAL CACHED

SQL> alter database open ;
alter database open
*
ERROR at line 1:
ORA-15000: command disallowed by current instance type


SQL> alter diskgroup all mount ;
alter diskgroup all mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15130: diskgroup "DG1" is being dismounted
ORA-15066: offlining disk "DG1_0001" may result in a data loss


SQL>
SQL>
so in that cse the contents are as follows

on Jul 11 21:58:46 2011
Dirty detach reconfiguration started (old inc 2, new inc 2)
List of nodes:
0 1
Global Resource Directory partially frozen for dirty detach
* dirty detach - domain 1 invalid = TRUE
0 GCS resources traversed, 0 cancelled
Dirty Detach Reconfiguration complete
Mon Jul 11 21:58:46 2011
freeing rdom 1
Mon Jul 11 21:58:47 2011
WARNING: dirty detached from domain 1
Mon Jul 11 21:58:47 2011
ERROR: diskgroup DG1 was not mounted
Mon Jul 11 21:58:47 2011
WARNING: PST-initiated MANDATORY DISMOUNT of group DG1 not performed - group not mounted
Mon Jul 11 21:58:47 2011
Errors in file /u01/app/oracle/admin/+ASM/bdump/+asm1_b000_18030.trc:
ORA-15001: diskgroup "DG1" does not exist or is not mounted
ORA-15001: diskgroup "DG1" does not exist or is not mounted

so iam not able to figure out please help me in solving this

Thanks in Advance
Regards
Kavita