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 Only block devices leading by letter b in permission notation are acceptable, any others device types, such as character devices or pseudo devices are not ASM candidates. Neither are symbolic links (leading by letter l). Please see an example […]
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 […]