Hi Mohan, Good to see your problem is solved. Out of curiosity, may I ask why you explicitly set asm_diskstring when you are using asmlib? It should have been sufficient to leave it to the empty string, or alternatively set to 'ORCL:*'. You might notice that your library in v$asm_disk is not ASMLib, but system. As far as I know this is not a problem since you still use direct IO. Best regards, Martin Martin Bach Oracle Certified Master 10g http://martincarstenbach.wordpress.com http://www.linkedin.com/in/martincarstenbach ----- Reply message ----- From: "Mohan" <krisgator@xxxxxxxxx> Date: Fri, Nov 19, 2010 01:09 Subject: unable to add disks to asm diskgroup To: "Kjetil Strønen" <kjetil@xxxxxxxxxx> Cc: <oracle-l@xxxxxxxxxxxxx> Thanks Kjetil. It was something to do with ASM_DISKSTRING parameter which was supposed to be /dev/oracleasm/disks/* and not /dev/oracleasm/disks Its working now! -Mohan 2010/11/18 Kjetil Strønen <kjetil@xxxxxxxxxx> > On Thu, 2010-11-18 at 17:07 -0600, Mohan wrote: > > Hi folks, > > > > I am facing this wierd ASM diskgroup issue. I am trying to add disks > > to already existing diskgroups data and fra and found the below error: > > > > SQL> alter diskgroup DATA add disk > > '/dev/oracleasm/disks/DISK3,/dev/oracleasm/disks/DISK4'; > > alter diskgroup DATA add disk > > '/dev/oracleasm/disks/DISK3,/dev/oracleasm/disks/DISK4' > > * > > ERROR at line 1: > > ORA-15032: not all alterations performed > > ORA-15031: disk specification > > '/dev/oracleasm/disks/DISK3,/dev/oracleasm/disks/DISK4' matches no > > disks > > <snip> > > Am I missing anything here? > > I think it might be as simple as > > alter diskgroup DATA add disk '/dev/oracleasm/disks/DISK3', > '/dev/oracleasm/disks/DISK4'; > > --Kjetil > > >