Error Code details
V-5-2-6420
Severity: Information 
Component: Volume Manager 
Message:
Missing entry for root disk <diskname> in /boot/grub2/device.map
Description:

If you perform root disk encapsulation while the device.map file is not up to date, the vxdiskadm command displays this message.

 

Veritas solutions
Solution 1 Vote: [Useful] [Not useful]
Last Modified: 2014-09-22 06:57:15 PDT
Platform: Generic
Release: Generic
Content:

This message only applies to Linux platform.

 

Before you perform root disk encapsulation, run the the following command to regenerate the device.map file:

 

grub-install --recheck <diskname>

 

In the above command line, the <diskname> is the disk booted with. Ideally it should be the root disk. For eg., grub-install  --recheck /dev/sdb

 

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