Can i know the about DRD clone

[Prabhi]

Differance in DRD clone and mirror disk,Why we use DRD clone and how to configure this in hp-unix 11.31

[Kapil Jha]

http://software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=DynRootDisk

DRD creates another exact environmnet (clone)as normal system, we can do patching on this environment and if we feel everything is fine you can make it permanent.

It basically reduce downtime and lets you do lots of tasks on root volume group.
more information
http://h71028.www7.hp.com/enterprise/w1/en/os/hpux11i-system-management-dynamic-root-disk.html

BR,
Kapil+

[R.K. #]

Hello Prabhi,

>> Differance in DRD clone and mirror disk
Same, except mirror disk will be in synced state always.

>> Why we use DRD clone
For patching, kernel tuning, installation of software, rehosting etc. So, you will be doing your experiments on the clone disk and your original disk will remain untouched. Then you will reboot using your clone-experimented disk and if everything is fine, you can go ahead and do same on your original disk. This will reduce downtime.

>> how to configure this in hp-unix 11.31
Quite simple...4-5 steps that is all.

-Select the disk to be cloned
-Clone it using "/opt/drd/bin/drd clone"
-Do your experiment on cloned disk using "/opt/drd/bin/drd runcmd"
-Activate it using "drd activate"
-Boot from cloned disk using "shutdown -ry 0"
-If server is up without any issue, you can use your original disk and repeat steps or clone it.


For illustrative info:
http://docs.hp.com/en/5992-6590/ch02s07.html

Regds..