SFHA Solutions 6.1: Protecting & Restoring VxVM disk group configuration information
The disk group configuration information is stored on disk in the VxVM private region. The default size of the private region is 32 megabytes. Stored disk group configuration includes a disk header label, configuration records for VxVM objects (such as volumes, plexes and subdisks), and an intent log for the configuration database. Configuration information must be stored on at least one disk in a VxVM disk group. The disk group configuration backup and restoration feature allows you to save and restore all configuration data for VxVM disk groups. Configuration information is critical for the disk group. By using the configuration data from a backup, you can: Reinstall damaged private region headers of VxVM disks in a disk group. Recreate a corrupted disk group configuration. Recreate a disk group and the VxVM objects within it. Recreate a disk group on another system if the original system is not available. Backing up disk group configurations Whenever a configuration is changed, the vxconfigbackupd daemon automatically backs up information about a disk group’s new configuration. You can use the vxconfigbackup utility to manually back up the disk group configuration at any time for one or more disk groups by specifying the disk groups either by name or by identifier (ID). If you do not specify a disk group, all disk group configurations are backed up. For more information on backing up configurations, see: Backing up and restoring disk group configuration data (AIX, Linux, Solaris) About disk group configuration backup (AIX, Linux, Solaris) Backing up a disk group configuration (AIX, Linux, Solaris) vxconfigbackupd(1M) 6.1 manual pages: AIX Linux Solaris vxconfigbackup(1M) 6.1 manual pages: AIX Linux Solaris For information on restoring configuration data, refer to the following Symantec Connect article: SFHA Solutions 6.0.1: Restoring disk group configuration information using vxconfigrestore Symantec Storage Foundation and High Availability documentation for other releases can be found on the SORT website.
SFHA Solutions 6.0.1: Restoring disk group configuration information using vxconfigrestore
The Veritas Volume Manager (VxVM) vxconfigrestore utility allows you to restore a disk group's configuration information if it is lost or has become corrupted. The restore process requires a disk group configuration backup file. The vxconfigbackupd daemon creates a backup file whenever a disk group configuration changes. You can also run the vxconfigbackup command to create a backup file at any point. Restoration of a disk group configuration has two stages: precommit and commit. The precommit stage allows you to temporarily load the backed up configuration in read-only mode, and examine it using the vxprint utility. The changes are permanently written to disk only when you choose to commit them. When you back up and restore a disk group configuration file, also note the following points: None of the disks or VxVM objects in the disk group must be in use during the restore operation. You must restore a disk group on the same physical disks as are defined in the configuration backup files. As the configuration backup and restore utilities do not save or restore any data in the public region, if there is any File System or application data on the disks, it is left as is. For information about how to back up and restore the disk group configuration files, see: About disk group configuration backup Backing up a disk group configuration Restoring a disk group configuration Resolving conflicting backups for a disk group vxconfigrestore (1M) 6.0.1 manual pages: AIX HP-UX Linux Solaris vxconfigbackupd (1M) 6.0.1 manual pages: AIX HP-UX Linux Solaris vxconfigbackup (1M) 6.0.1 manual pages: AIX HP-UX Linux Solaris The vxconfigd daemon handles all configuration management tasks for VxVM objects, including maintaining disk group configuration details. For more information on the vxconfigd daemon, refer to the following Symantec Connect article: SFHA Solutions 6.0.1: About the vxconfigd daemon Veritas Storage Foundation and High Availability documentation for other platforms and releases can be found on the SORT website.