How to switch the extenal disk for L3000 Server?

[Chen Yingjie]

We have 1 HP9000 L3000 server with HP-UX 11.00.
The server has its own extenal disks and run in
normal.
Now, we want make this server as a cold standby
backup server for other production server(L2000).
Our plan is followings.
(1)Add same size extenal disks as the production server to the target server.
(2) Connect the added disk to target server.
(3)Create LVOL for the added disks as the production server.
(4)Hide the added disks
(5) When production server corrupted, disable the current extenal disks of target server and activate the added extenal disks of target server.
(6) Change the hostname of target server as the corrupted production server.

Can someone advise me this plan is OK or NOT?
If possible, please give me some suggestions and the detail command procedures.

Thank you very much.

Chen Yingjie

[Robert-Jan Goossens]

Hello,

How much time do you have for disaster recovery in your service level agreement?

There are some holes in your solution.

(2) Connect the added disk to target server.
you will need to create a new volume group otherwise if you reconnect to you DR server the volume group will be corrupt. You could run a cron job to sync these volumegroups every nihgt.

(5) When production server corrupted, disable the current extenal disks of target server and activate the added extenal disks of target server.
You could vgexport / vgimport the disks from your productuction server to your DR server.

If you have a solid backup solution I would add the same number of disks to you DR server, created an ignite backup tape/net image of you production server.
In case of a disaster, restore the ignite image and restore your data from regular backup.

Hope this helps,
Robert-Jan