Posts Tagged ‘ASM’
Adding new ASM disk to RAC database fails
Many times i came across a common problem in RAC databases where trying to add an asm disk is not possible due to errors like ORA-15075 “disk(s) are not visible cluster-wide” ORA-15020 “discovered duplicate ASM disk “DISK1″ and ORA-15054 [Read More]
Allocation Unit and Extents In ASM
ASM was introduced with Oracle 10g and is used as a Volume Manager and a file system. It provides both mirroring and striping of the database files. To use ASM you need to create a Diskgroup and add disks/raw devices to the Diskgroup.Data is allocated in disks in terms of [Read More]
ORA-15063 – ASM Discovered Insufficient amount of Disks
Looking at the response generated by my earlier post on ASM, I thought of writing one more article. Many of us (Working on ASM) would have encountered following errors during startup of ASM instance ORA-15032: not all alterations performed ORA-15063: ASM discovered an [Read More]
ASM Disk Discovery
While creating ASM diskgroup or adding new disk to a existing diskgroup, Disk should be visible in V$ASM_DISK. ASM discovers and examines the contents of all of the disks that are in the paths that you designated with values in the ASM_DISKSTRING initialization parameter. [Read More]
