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Full Discussion: Backup and restore
Operating Systems AIX Backup and restore Post 302563224 by rbatte1 on Monday 10th of October 2011 11:29:26 AM
Old 10-10-2011
Hmmm, not a good starting point.

The good news is that the SAN definition of PP size should be irrelevant. It might cost you a little bit of usable space, but that's probably minimal. Your problem will be that you are moving from AIX LV mirrors to hardware mirrors (however the SAN protects the allocated disk) so I have a question about you backup process.

Do you use mkszfile before each mksysb? If so, then you may have got a way round things, but you are still exposing yourself to risks of hdisk0 failing during the backup before the mirror on hdisk1 is complete. Removing the mirrors will clear the disk, so it's not like a split mirror that some other systems have or Veritas can provide. You must also remember to use bosboot and check the bootlist after the mirror.

It might be better to:-
  1. Run mksysfile to generate an up-to-date configuration file, mirrors and all.
  2. Edit /image.data and set all COPIES= 2 statements to be COPIES= 1
  3. Run mksysb
Be aware that your tape will only create a single copy, so if you recover to a machine without hardware protected boot disk, you would need to manaully mirror afterwards, including the bosboot and edit of the bootlist If you have to recover to your live system, install to a single disk rather that risk the restore spreading out over both disks.


For your data volume group, it is unclear if the logical volumes are mirrored or how you back them up. If not mirrored, then you are exposed to hardware failure at any time. If they are, then you can perform similar actions, but it would be good to know the backup method for the data before I leap into something. What would your DR recovery procedure be like too? It's all well and good to say you have a backup, but have you tested your restore plan?


Let me know what you have in place and I will see about other suggestions to further protect you. Is it savevg, tar, cpio or perhaps a 3rd party backup tool?




Robin
Liverpool/Blackburn
UK
 

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BACKUP_LISTVOLSETS(8)					       AFS Command Reference					     BACKUP_LISTVOLSETS(8)

NAME
backup_listvolsets - Lists volume set entries from the Backup Database SYNOPSIS
backup listvolsets [-name <volume set name>] [-localauth] [-cell <cell name>] [-help] backup listv [-n <volume set name>] [-l] [-c <cell name>] [-h] DESCRIPTION
The backup listvolsets command displays the Backup Database records for either o All volume sets and their volume entries, if the -name argument is omitted. o The volume set specified by the -name argument, along with its volume entries. OPTIONS
-name <volume set name> Names the volume set to display. If this argument is omitted, the output lists all volume sets defined in the Backup Database. -localauth Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8). -cell <cell name> Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8). -help Prints the online help for this command. All other valid options are ignored. OUTPUT
The entry for each volume set begins with the "Volume set" header and the volume set's name. A temporary volume set's name is followed by the string " (temporary)". Each volume entry follows on a separate line, indicating the entry's index number and the server, partition, and volume names it matches. The output uses the metacharacter notation described on the backup addvolentry reference page. Use the index number to identify volume entries when deleting them with the backup delvolentry command. EXAMPLES
The following example shows the volume entries in the three volume sets currently defined in the Backup Database: % backup listvolsets Volume set user: Entry 1: server .*, partition .*, volumes: user.*.backup Volume set sun Entry 1: server .*, partition .*, volumes: sun4x_55..* Entry 2: server .*, partition .*, volumes: sun4x_56..* Volume set rs Entry 1: server .*, partition .*, volumes: rs_aix42..* PRIVILEGE REQUIRED
The issuer must be listed in the /etc/openafs/server/UserList file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser "root" if the -localauth flag is included. SEE ALSO
backup(8), backup_addvolentry(8), backup_addvolset(8), backup_delvolentry(8), backup_delvolset(8) COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 BACKUP_LISTVOLSETS(8)
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