AIX 백업 (alt_disk_install command)

1. To clone the running 4.2.0 rootvg to hdisk3, then apply updates from /updates to bring the cloned rootvg to a 4.2.1 level:

   alt_disk_install -C -F 4.2.1.0_AIX_ML -l /updates hdisk3

   The bootlist would then be set to boot from hdisk3 at the next reboot.

2. To install a 4.3 mksysb image on hdisk3, then run a customized script (/home/myscript) to copy some user files over to the alternate rootvg file systems before reboot:

   alt_disk_install -d /mksysb_images/4.3_mksysb -s /home/myscript hdisk3

3. To remove the original rootvg ODM database entry, after booting from the new alternate disk:

   alt_disk_install -X old_rootvg

   The lspv listing for the original rootvg will be changed to "None". Therefore, a new volume group could be created on those disks.

4. To determine the boot disk for a volume group with multiple physical volume:

   alt_disk_install -q hdisk0

   Illustrated Example

   # lspv
   hdisk0          00006091aef8b687     old_rootvg
   hdisk1          00076443210a72ea     rootvg
   hdisk2          0000875f48998649     old_rootvg
   # alt_disk_install -q hdisk0
   hdisk2

   In this case, the boot disk for "old_rootvg" is actually hdisk2. Therefore, you could reset your bootlist to hdisk2 and reboot to the original rootvg volume group.

5. To modify an alt_disk_install volume group name:

   alt_disk_install -v alt_disk_432 hdisk2

   Illustrated Example

   # lspv
   hdisk0          00006091aef8b687     rootvg
   hdisk1          00000103000d1a78     rootvg
   hdisk2          000040445043d9f3     altinst_rootvg
   hdisk3          00076443210a72ea     altinst_rootvg
   hdisk4          0000875f48998649     None
   hdisk5          000005317c58000e     None
   # alt_disk_install -v alt_disk_432   hdisk2
   #lspv
   hdisk0          00006091aef8b687     rootvg
   hdisk1          00000103000d1a78     rootvg
   hdisk2          000040445043d9f3     alt_disk_432
   hdisk3          00076443210a72ea     alt_disk_432
   hdisk4          0000875f48998649     None
   hdisk5          000005317c58000e     None

6. To "wake_up" an original rootvg, after booting from the new alternate disk:

   alt_disk_install -W hdisk0

   Illustrated Example

   # lspv
   hdisk0          000040445043d9f3     old_rootvg
   hdisk1          00076443210a72ea     rootvg
   # alt_disk_install -W hdisk0
   # lspv
   hdisk0          000040445043d9f3     altinst_rootvg
   hdisk1          00076443210a72ea     rootvg

   At this point, the "altinst_rootvg" volume group is varied-on and the /alt_inst file systems will be mounted.

7. To "put-to-sleep" a volume group that had experienced a "wake-up":

   alt_disk_install -S

   Illustrated Example

   # lspv
   hdisk0          000040445043d9f3     altinst_rootvg
   hdisk1          00076443210a72ea     rootvg
   # alt_disk_install -S
   # lspv
   hdisk0          000040445043d9f3     altinst_rootvg
   hdisk1          00076443210a72ea     rootvg

   The "altinst_rootvg" is no longer varied-on and the /alt_inst file systems are no longer mounted. If it's necessary for the "altinst_rootvg" volume group name to be changed back to "old_rootvg", this can be done with the "-v" flag.