ASM

How to Create a ASM Disk Group

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To isolate non-crucial backups from crucial data in the current disk group DATA, a separate new disk group with new disks is needed to put all backups. For meeting our new requirement, we plan to create a disk group called FRA, i.e. Fast Recovery Area, by ourselves. The utility that we are going to use […]
ASM

How to Resolve Grid Installation OUI Discovers No Disk

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Requirements for Disk Discovery There’re several requirements for disks to be discovered: 1. Right Device Type For 11g or later, only block devices leading by letter b in permission notation are acceptable, any others device types, such as character devices, symbolic links (leading by letter l) and pseudo devices are not ASM candidates. Please see […]
ASMLib

How to Resolve ASMLib Scanned No Disks on Boot

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ASMLib Scanned Nothing on Boot-Time ASMLib seems to be started too soon to scan iSCSI disks which may not be ready on boot in Enterprise Linux 7. [root@primary01 ~]# oracleasm listdisks [root@primary01 ~]# oracleasm-discover Using ASMLib from /opt/oracle/extapi/64/asm/orcl/1/libasm.so [ASM Library – Generic Linux, version 2.0.12 (KABI_V2)] Nothing was found there when we tried to list […]