HP Veritas Volume Manager 5.0 -UX 11i v3 manual Configuring sites for hosts and disks

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Administering sites and remote mirrors

Configuring sites for hosts and disks

Configuring sites for hosts and disks

Note: The Remote Mirror feature requires that the Site Awareness license has been installed on all hosts at all sites that are participating in the configuration.

Use the following command to set the site name for each host:

#vxdctl set site=sitename

The name that has been assigned to a site is stored in the /etc/vx/volboot file, and can be displayed by using the vxdctl list command:

#vxdctl list grep siteid siteid: building1

To remove the site name from a host, use this command:

#vxdctl [-F]unset site

The -Foption is required if any imported disk groups are registered to the site. To tag disks with a site name, use the vxdisk settag command as shown here:

#vxdisk [-g diskgroup] settag disk site=sitename

where the disk can be specified either by the disk access name or the disk media name. You must repeat this command for each of the disks that are to be registered to a site.

To check which disks are registered to a site, use the vxdisk listtag command:

#vxdisk [-g diskgroup] listtag

To remove the site tag from a disk, use the vxdisk rmtag command:

#vxdisk rmtag disk site=sitename

Configuring site-based allocation on a disk group

To turn on the site-based allocation requirement for a site that is registered to a disk group, use the vxdg addsite command for each site at which site-based allocation is required:

#vxdg -g diskgroup [-f]addsite sitename

Each volume on which the allsites attribute is set to on is checked to ensure that it has at least one plex at each site, and the command fails if this condition is not met. If the -foption is specified, the command does not fail, but instead it sets the allsites attribute for the volume to off.

Provided that the Site Awareness license is installed on all the hosts in the Remote Mirror configuration, a volume is automatically mirrored across sites and its read policy is set to siteread when it is created. If site-based allocation is not required, or is not possible (as is the case for RAID-5 volumes), specify the allsites=off attribute to the vxassist command.

To remove the site-based allocation requirement from a site, use this command:

# vxdg -gdiskgroup [-f]rmsite sitename