How do I format an ASM disk?

Posted on by Muna Meyer

How do I format an ASM disk?

#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 restore ASM Diskgroup?

  1. Step 1: Ensure that you have a prior RMAN backup of all databases using ASM.
  2. Step 2: Shutdown your ASM instance(s)
  3. Step 3: Re-create your ASM disk group(s)
  4. Step 4: Restore database.

How do you change ASMDiskstring parameter?

To add a ASM disk group you first need to set the ASM_DISKSTRING parameter. You can then add disk groups to your ASM instance….Setting the ASM_DISKSTRING Parameter.

Platform Name Default ASM_DISKSTRING value
Mac OS X /dev/rdisk*s*s1
Solaris /dev/rdsk/*
Tru64UNIX /dev/rdisk/*

How do I uninstall ASM disk?

Remove disk from ASM diskgroup. SQL> alter diskgroup ORA_DATA drop disk ORA_DATA_0010 rebalance power 100; 3….Remove Disk from ASM diskgroup in Oracle 19c.

  1. Check the ASM disks in ASM DiskGroup.
  2. Remove disk from ASM diskgroup.
  3. Check the rebalance status.
  4. Check the dropped disk from ASM Diskgroup.
  5. Delete the ASM Disk.

How do I create a disk for ASM?

How to prepare disks for oracle ASM?

  1. Step 1: Check multipathd service is running and configured. Define Storage Device; Define Disk Names; Start Multipath Service;
  2. Step 2: Create a partition for the disk.
  3. Step 3: Get Partition UUID.
  4. Step 4: Create Udev Rules.
  5. Step 5: Udev Reload – Optional.

How do I clear the ASM disk header in Linux?

How to clear ASM disk Headers in Centos and Redhat

  1. 1-Show ASM disks.
  2. 2-Clear the Disks Headers # dd if=/dev/zero of=/dev/asm/fra01 bs=8192 count=12800 12800+0 records in 12800+0 records out 104857600 bytes (105 MB) copied, 0.136025 s, 771 MB/s.

How do I know if ASM is compatible with Diskgroup?

Check the compatibility of ASM diskgroup in Oracle

  1. Check the compatibility of a ASM diskgroup. SELECT name AS diskgroup, substr(compatibility,1,12) AS asm_compat,
  2. Check the ASM attribute. column value for a20.
  3. Create diskgroup defines tha attribute.
  4. Alter command only used to increased value.

How do I add a disk to ASM Diskgroup?

  1. Create ASM disk. Get the Lun name from storage team. Lun Name – /dev/sda1.
  2. Check the ASM Disks, Check the newly added disk, $sudo oracleasm listdisks.
  3. Create the ASM Diskgroup. $sqlplus / as sysasm.
  4. Check the rebalance status. $sqlplus / as sysasm.
  5. Check the newly added disk in ASM Diskgroup.

What is ASM Diskstring?

The ASM_DISKSTRING initialization parameter specifies a comma-delimited list of strings that limits the set of disks that an Oracle ASM instance discovers. The discovery strings can include wildcard characters. Only disks that match one of the strings are discovered.

What is ASM power limit?

The ASM_POWER_LIMIT initialization parameter specifies the default power for disk rebalancing in a disk group. The range of values is 0 to 1024 . The default value is 1 . For disk groups that have the disk group ASM compatibility set to less than 11.2.

How do I clear the ASM disk header?

How do you replace ASM disk?

To replace an existing disk with a new disk, follow these steps:

  1. Access the Oracle Automatic Storage Management home page.
  2. Click the Disk Group tab.
  3. Select a Disk Group.
  4. Select an offline disk to replace.
  5. Select a new disk and then specify the options, such as Rebalance Power, and then click OK.

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