Tag Archives: filter driver

Create Oracle ASM diskgroups with Dell PowerMax and PowerPath

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In this post I am going to explore adding a new ASM diskgroup to an Oracle 19c RAC using PowerMax storage.

We will follow best practices as laid out in H17390 Deployment Best Practices Guide for Oracle with Powermax. This post is a companion to the video Create Oracle ASM diskgroups with Dell PowerMax and PowerPath.

This blog post assumes some basic knowledge of PowerMax storage concepts. If you need a basic introduction please check out my PowerMax basics video.

These examples will use the Solutions Enabler command line method of managing the PowerMax, unlike the video which uses the Unisphere graphical interface.

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ASM Filter Drivers – disks not filtering on reboot

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You’ve enabled ASM Filter Drivers, migrated your existing disks, and then after you reboot you see this:

[oracle@oel6solo ~]$ asmcmd afd_lsdsk
--------------------------------------------------------------------------------
Label Filtering Path
================================================================================
DATA2 DISABLED /dev/sdc
DATA4 DISABLED /dev/sde
DATA3 DISABLED /dev/sdd
DATA1 DISABLED /dev/sdb

You check the ASM Filter Driver state and it says it is loaded and filtering:

[oracle@oel6solo ~]$ asmcmd afd_state
ASMCMD-9526: The AFD state is 'LOADED' and filtering is 'DEFAULT' on host 'oel6solo.comp-lab.sc'

There is one more step that much of the documenation is missing:

[oracle@oel6solo ~]$ $ORACLE_HOME/bin/asmcmd afd_filter -e

Now the ASM FD filtering will survive a reboot:

[oracle@oel6solo ~]$ asmcmd afd_lsdsk
--------------------------------------------------------------------------------
Label Filtering Path
================================================================================
DATA2 ENABLED /dev/sdc
DATA4 ENABLED /dev/sde
DATA3 ENABLED /dev/sdd
DATA1 ENABLED /dev/sdb