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How do I view ASM disk groups?

How do I view ASM disk groups?

To see all disks, use V$ASM_DISKGROUP instead. Contains one row for every Oracle ASM file in every disk group mounted by the Oracle ASM instance. In an Oracle ASM instance, contains one row for every active Oracle ASM long running operation executing in the Oracle ASM instance.

How do I mount an ASM disk group?

A disk group number is not recorded in any persistent structure, but the current value can be viewed in the GROUP_NUMBER column of the V$ASM views. When you want to mount or dismount disk groups manually, use the ALTER DISKGROUP… MOUNT or ALTER DISKGROUP… DISMOUNT statement.

How do I check my ASM status?

Verify the ASM setup

  1. Change to the Oracle Clusterware/Grid Infrastructure home directory: For Oracle RAC 10g Release 2/Oracle RAC 11g Release 1: # cd $CRS_HOME/bin.
  2. Verify the status of ASM on all the nodes in the cluster: # ./srvctl status asm ASM instance +ASM1 is running on node galaxy.

How do I view ASM disk header?

Use kfed to read ASM disk header block. The following is an example of using the kfed utility to read the ASM disk header from ASM disk /dev/sda1. Note that the above kfed command is equivalent to this one (with all parameters explicitly set to their default values):

How do I get ASM disk details in Linux?

In Linux, ASMLib provides the wrapper for managing the ASM disks. To identify the underlying physical device that the ASM disk point to, you can use the oracleasm querydisk command. The querydisk option will list the major and minor numbers that can be used to match the physical device.

How do I check my ASM disk group free space?

SQL:ASM>select name,total_mb,free_mb,state from v$asm_diskgroup; ASMCMD tool can also be used to find the free space. du -Displays the total disk space occupied by ASM files in the specified ASM directory and all its subdirectories, recursively.

How do I check ASM disk errors?

If Oracle ASM detects errors, then Oracle ASM stores information about errors in the alert log. To check disk groups, perform the following steps: From the Disk Groups page, select a disk group in the list and click Check. A confirmation dialog for the check disk group operation displays.

How do I connect to an ASM instance?

How to connect to ASM instance from a remote client

  1. Edit the listener.ora on ASM server.
  2. Edit the tnsnames.ora on the client.
  3. Setup your remote login password for your ASM instance on the ASM server.
  4. Set your SYS password using ORAPWD for the ASM instance.

How do I reclaim space from ASM Diskgroup?

ASMFD Thin_Provisioned Demo

  1. Create an ASM Disk Group using the ASM Filter Driver.
  2. Create a tablespace in this diskgroup and populate it with some random data.
  3. Check the space allocated at the database and array level.
  4. Drop the tablespace and run ASM rebalance.
  5. Check the space again.

How do I mount an ASM disk in Linux?

Create Oracle Asm Disks on Oracle Linux

  1. I will create three asm disks for GRID, FRA and DATA on Oracle Linux 6.3 on VMware. Asm disks will be GRID sdc, DATA sdd, FRA sde. Partition the Disks.
  2. Configure OracleAsm on First Node.
  3. Configure OracleAsm on Second Node.
  4. Create Asm Disks on First Node.
  5. Scan Asm Disks on Second Node.

How do I view offline disks on ASM?

select group_number, name, state, type from v$asm_diskgroup;

  1. To check the asm instance is connected and running:
  2. To check the asm disks and their status:
  3. MISSING – Automatic Storage Management metadata indicates that the disk is known to be part of the Automatic Storage Management disk group, but no disk in the storage.

How do you manually rebalance ASM disk groups?

You can manually rebalance the files in a disk group using the REBALANCE clause of the ALTER DISKGROUP statement. This would normally not be required, because Oracle ASM automatically rebalances disk groups when their configuration changes.

How do I free up disk space in Oracle?

Free Up Disk Space

  1. Log in as the oracle user.
  2. Find and remove the dump files. Copy. find . – name OCSDMDW_Dump*.dmp | xargs rm –rf.

How do I check free space on ASM Diskgroup?

Answers. // The Following query can be used to find out the total/free space in ASM Diskgroups: SQL:ASM>select name,total_mb,free_mb,state from v$asm_diskgroup; ASMCMD tool can also be used to find the free space.

Where is my ASM disk path?

How do I check ASM rebalance?

Query to V$ASM_OPERATION shows that the status of ASM diskgroup rebalance (using power setting 0) is waiting and the rebalance does not finish.

  1. Query to V$ASM_OPERATION shows that the status of ASM diskgroup rebalance (using power setting 0) is waiting and the rebalance does not finish.
  2. Applies to:
  3. Symptoms.
  4. Cause.

How do you rebalance an ASM disk?

How do I check disk space utilization in Oracle?

Using the Computer properties window:

  1. Open the Start menu, then click Computer.
  2. View the free disk space for each drive.
  3. Right-click the drive on which you plan to install the Oracle software and select Properties to view additional information about the disk space for that drive.
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