Greetings, I am continuing to have difficulties getting ASM installed and configured in my two-node RAC cluster, Oracle 10.2.0.3.0 on RHEL3 and I am certain there is some very simple little bit which I am missing but I just can't figure this out. I encountered difficulties with the ASM installation a couple of days ago and it was suggested that I uninstall everything and start all over again with CRS which I did. I installed CRS and began the installation of ASM. I configured the ASM instance using the installer. When it got to the point of creating a disk group I accepted what I thought was the default 'DATA' and continued but the installer said such a group already existed. That surprised me because I thought I had removed all traces by uninstalling, deleteing and dd on disks. Nevertheless, the install seemed ok, it just couldn't mount the disk groups. I went ahead, installed the 10.2.0.3.0 patch set and am now trying to get the dis groups mounted and here is what I find. First, there is a diskgroup but it is not mounted... SQL> select * from v$asm_diskgroup; GROUP_NUMBER NAME SECTOR_SIZE BLOCK_SIZE ALLOCATION_UNIT_SIZE STATE ------------ ------------------------------ ----------- ---------- -------------------- ----------- TYPE TOTAL_MB FREE_MB REQUIRED_MIRROR_FREE_MB USABLE_FILE_MB OFFLINE_DISKS U ------ ---------- ---------- ----------------------- -------------- ------------- - COMPATIBILITY ------------------------------------------------------------ DATABASE_COMPATIBILITY ------------------------------------------------------------ 0 DATA 512 4096 1048576 DISMOUNTED 0 0 0 0 0 N 0.0.0.0.0 0.0.0.0.0 I can't mount it... SQL> alter diskgroup data mount; alter diskgroup data mount * ERROR at line 1: ORA-15032: not all alterations performed ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA" I can't add a disk... SQL> alter diskgroup data add disk '/dev/raw/raw3'; alter diskgroup data add disk '/dev/raw/raw3' * ERROR at line 1: ORA-15032: not all alterations performed ORA-15001: diskgroup "DATA" does not exist or is not mounted Nor can I drop it... SQL> drop diskgroup data including contents; drop diskgroup data including contents * ERROR at line 1: ORA-15039: diskgroup not dropped ORA-15001: diskgroup "DATA" does not exist or is not mounted So I tried to create a new disk group... SQL> create diskgroup GROUP1 external redundancy 2 disk '/dev/raw/raw3'; create diskgroup GROUP1 external redundancy * ERROR at line 1: ORA-15018: diskgroup cannot be created ORA-15020: discovered duplicate ASM disk "DATA_0000" But I don't see where that disk shows up... SQL> select group_number,disk_number,name,path from v$asm_disk; GROUP_NUMBER DISK_NUMBER NAME ------------ ----------- ------------------------------ PATH ------------------------------------------------------------------------ ---------------------------- 0 0 /dev/raw/raw4 0 1 /dev/raw/raw3 0 4 ORCL:VOL2 0 3 ORCL:VOL1 0 2 /dev/raw/raw2 The parameter asm_diskstring is not set but I don't know if that has anything to do with this. I'm completely stuck, I don't know what else to look at. I did configure the disks with oracleasm and I am pretty sure I did that part correctly. Sorry to keep bugging everyone with this but I'm completely stuck. I suspect it is something simple that I am just not seeing. If anyone can help me I would greatly appreciate it. Thanks. Bill Wagman Univ. of California at Davis IET Campus Data Center wjwagman@xxxxxxxxxxx (530) 754-6208 -- //www.freelists.org/webpage/oracle-l