How to enable root support in Dynamic Multi- Pathing (DMP) linux

Article: 100037910
Last Published: 2023-09-05
Ratings: 1 0
Product(s): InfoScale & Storage Foundation

Description

When Dynamic Multi-Pathing (DMP) is installed on linux, Native device support is enabled by default for non-root devices.

To enable root support in DMP, the following command can be used:

Note: A reboot will be required.

 

# vxdmpadm settune dmp_native_support=on

As part of enabling root device support, this command will update the grub configuration with a new entry (Title: vxdmp_root) which allows the system to boot off a root device managed by DMP. This entry will be the default boot option.

 

Example:

# vxdmpadm settune dmp_native_support=on
VxVM vxdmpadm INFO V-5-1-15866 DMP Native Support is enabled/disabled for root LVM volume. Please reboot the system for changes to take effect.

 

To check if dmp native support is enabled, run the following command.

# vxdmpadm gettune all
            Tunable               Current Value  Default Value
------------------------------       -------------       -------------
 dmp_native_support                 on              off  

 

To view the disks under native control:

# vxdmpadm native ls
DMPNODENAME                      POOL NAME
=============================================
disk_0                           -
emc0_02bf                        symc13
emc0_02c0                        symc13
emc0_02c1                        -
emc0_02c2                        -
emc0_02c3                        -
emc0_02c4                        -
emc0_02c5                        -
emc0_02c6                        -

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