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Error:
ORA-27041: unable to open file
Cause:
Unable to start the database after adding new disk in diskgroup.
Solution:
1. Check the permission of the disks.
Note: Need permission at OS level is 660 permissions:
oracle@RAC1 $ ls -ltra ../../devices/scsi_vhci/disk@g6000b5d0006a6a085f006f0000:a,raw
crw-r----- 1 grid asmadmin 30, 3008 Jul 4 16:39 ../../devices/scsi_vhci/disk@g6000b5d0006a0000006a085f006f0000:a,raw
2. Shutdown the database and cluster register service(CRS):
crsctl stop cluster -n RAC1
3. Change the permission of ASM disk
chmod 660 ../../devices/scsi_vhci/disk@g6000b5d0006a6a085f006f0000:a,raw
4. Start the CRS on affected Node.
crsctl start cluster -n RAC1
