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:-
- Run mksysfile to generate an up-to-date configuration file, mirrors and all.
- Edit /image.data and set all COPIES= 2 statements to be COPIES= 1
- 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