Standby BOS setup operation

The standby BOS setup operation is described.

The multibos setup operation, using the -s flag, performs the following steps:

1. The multibos methods are initialized.
2. If you provide a customized image.data file, it is used for the logical volume attributes. Otherwise, a new one is generated. You can use the customized image.data file to change BOS object (logical volume or file systems) attributes. You cannot use the customized image.data file to add or delete BOS logical volumes or file systems.
3. The standby logical volumes are created based on image.data attributes. The active and standby logical volumes are marked with unique tags in the logical volume control block. The multibos utility uses these tags to identify copied logical volumes. If the active logical volume names are classic names, such as hd2, hd4, hd5, and so on, then the bos_ prefix is prepended to create a new standby name. If the active logical volume names have the bos_ prefix, the prefix is removed to create a new standby name.
   Note: The Logical Volume Manager (LVM) limits the maximum length of a logical volume name to 15 characters. This means that any logical volume classic name may not exceed 11 characters. You can rename logical volumes that have classic names that exceed 11 characters using the chlv command. If the active logical volume name already has the bos_ prefix, then the prefix is removed in the standby name.
4. The standby file systems are created based on image.data attributes. The active and standby file systems are marked with unique tags in the hosting logical volume control block and /etc/filesystems. The multibos utility uses these tags to identify copied logic volumes. The /bos_inst prefix is prepended to the original active file system name to create the standby file system name. The standby file system name may not exceed the system’s PATH_MAX limit. The standby file systems appear as standard entries in the active BOS /etc/filesystems.
5. The standby file systems are mounted.
6. A list of files that will be copied from the active BOS is generated. This list is comprised of the current files in copied active BOS file systems, less any files that you excluded with the optional exclude list (see the -e flag).
7. The list of files generated in the previous step is copied to the standby BOS file systems using the backup and restore utilities.
8. Any optional customization is performed. This can include installation of fileset updates or other software.
9. The standby boot image is created and written to the standby BLV using the AIX bosboot command. You can block this step with the -N flag. Only use the -N flag if you are an experienced administrator and have a good understanding the AIX boot process.
10. The standby BLV is set as the first boot device, and the active BLV is set as the second boot device. You can skip this step using the -t flag.