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Top Forums UNIX for Advanced & Expert Users Question about Grub2 and Multipathing Post 303024519 by Peasant on Wednesday 10th of October 2018 10:25:10 AM
Old 10-10-2018
I have no experience with boot from SAN on metal, to put a small disclaimer upfront.

Not related to the problem...what would really help you is to have a separated installed operating system on both environments (DCs), with data part replicated in separate volume groups.
That way, only thing you do is import the volume group and (possibly or not depends) an ip assignment, depending on the topology and services such as vrrp or higher layer used.

I never endorsed SAN boot on metal personally (but in vms of course), always had couple of local disks to mirror ...

Point being, i would go with service separation and clean install on each of the sites, while cloning data part via storage methods.

Hopefully someone else who used linux SAN boot will be of more assistance with the actual problem.

Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
 

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GRUB-REBOOT(8)						  System Administration Utilities					    GRUB-REBOOT(8)

NAME
grub-reboot - set the default boot entry for GRUB, for the next boot only SYNOPSIS
grub-reboot [OPTION] MENU_ENTRY DESCRIPTION
Set the default boot menu entry for GRUB, for the next boot only. -h, --help print this message and exit -V, --version print the version information and exit --boot-directory=DIR expect GRUB images under the directory DIR/grub instead of the /boot/grub directory MENU_ENTRY is a number, a menu item title or a menu item identifier. Please note that menu items in submenus or sub-submenus require speci- fying the submenu components and then the menu item component. The titles should be separated using the greater-than character (>) with no extra spaces. Depending on your shell some characters including > may need escaping. More information about this is available in the GRUB Manual in the section about the 'default' command. REPORTING BUGS
Report bugs to <bug-grub@gnu.org>. SEE ALSO
grub-set-default(8), grub-editenv(1) The full documentation for grub-reboot is maintained as a Texinfo manual. If the info and grub-reboot programs are properly installed at your site, the command info grub-reboot should give you access to the complete manual. grub-reboot (GRUB) 2.02-2ubuntu8.3 July 2018 GRUB-REBOOT(8)
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