How do I format an ASM drive?
#select query from the V$ASM_DISK_STAT and V$ASM_DISK views. Suppose /dev/sdd/dev01 is used by asm. you want to format and reuse it again. Place that disk name in OF parameter of following command and Format it.
How do I uninstall Asmlib?
Deinstalling Oracle ASMLIB On Oracle Database
- Stop Oracle ASM and any running database instance:
- Log in as root .
- Stop the Oracle Restart stack:
- Stop Oracle ASMLIB:
- Remove the oracleasm library and tools RPMs:
- Check if any oracleasm RPMs are remaining:
- If any oracleasm configuration files are remaining, remove them:
What is ASM disk?
Automatic Storage Management (ASM) is an integrated, high-performance database file system and disk manager. ASM is based on the principle that the database should manage storage instead of requiring an administrator to do it.
How do I start ASM in standalone?
Startup and shutdown the Oracle ASM instance
- Set the default Oracle_home environment variable to grid home where ASM is installed. EXPORT ORACLE_HOME=/up1/grid/12.2.0/dbhome_1.
- Connect with sqlplus. SQLPLUS / as sysasm.
- Start up the Oracle ASM Instance. SQL> STARTUP.
- Check the spfile location or otherwise set it with.
What is ASM instance?
ASM Instances Oracle Database 10g introduces the ASM instance, a special Oracle instance that manages the disks in disk groups. The ASM instance must be configured and running for the database instance to access Automated Storage Management files.
Why is ASM needed?
ASM eliminates the need for you to directly manage potentially thousands of Oracle database files. ASM groups the disks in your storage system into one or more disk groups. You manage a small set of disk groups and ASM automates the placement of the database files within those disk groups.
How do I manually start an ASM?
How can I tell if a database is using ASM?
Also, you can check if you have an ASM instance running as a service. Check Windows Explorer to see if your datafiles are on the file system or can’t be seen(meaning you are on ASM). you could do that too…if the datafiles show up as DISK1 etc…with the sign prefix, it means you are on ASM…
How do I log into ASM database?
How do I install and configure asmlib?
Install the ASMLIB (on each node for RAC environments) and configure it. ASMLib consists of the following components: An open source (GPL) utilities package: oracleasm-support A closed source (proprietary) library package: oracleasmlib Follow the detailed post below to install and configure ASMLIB on your system.
What is asmlib for Oracle Cloud?
Oracle Cloud Free Tier lets anyone build, test, and deploy applications on Oracle Cloud—for free. ASMLib is a support library for the Automatic Storage Management feature of Oracle Database 10 g. Oracle provides a Linux specific implementation of this library.
How to configure asmlib to use multipath disks?
Note: kpartx command creates multipathed partitions, for example partions on device mpath0 appear as /dev/mapper/mpath0p1, /dev/mapper/mpath0p2, etc. Now, Update the kernel partition table with the new partition as follow: After you complete the creation of each ASMLIB disk, you will need to configure ASMLIB to use multipath disks.
How does asmlib scan SCSI disks?
During a scan, ASMLib first tries all disks that start with “multipath”. The multipath device /dev/multipatha certainly matches. It is scanned first. Next, ASMLib tries all disks that start with “sd”. This is all the SCSI disks. The local disk /dev/sda will be scanned, but it is not an ASM disk.
https://www.youtube.com/watch?v=qleVmVP6oWw