Migration

[Ali Imran Abbas]

I am migrating a server from risc based server to rx (integrity server). I have few questions in this regard.

1-If I do ignite based tape backup of the old server, can I use this to install hpux on the new server provided the old server was risc based and the new one is itanium (rx-7640).

2-Lets say, if I install the new server with the ignite tape backup of the old server, it will bring the root volume group. Now, I have the question how to migrate other volume groups from the old server to the new one? Can any one provide me detailed and step by step proceedure to do this. This is a production server and we have 2 other volume groups on it beside the vgroot.

Regards,

Ali

[James R. Ferguson · Accepted solution]

Hi Ali:

You need to cold-install your new Itanium server from the appropriate OS media.

I assume that your non-vg00 volume groups reside as external (SAN) devices. Therefore, on your old server, do a 'vgexport -m -s -p' of your non-vg00 volume groups. Copy the resulting mapfiles to your new server; disconnect the physical disk volumes from the old server; connect the disk to your new server; and perform a 'vgimport' of the volume groups using the mapfiles from the old server. The use of the '-s' option causes the physical disk to be scanned and their VGID's to be matched to that in the mapfile in order to create a new '/etc/lvmtab'. See the manpages for 'vgexport' and 'vgimport' for more information.

Regards!

...JRF...

[Patrick Wallek]

1) NO. The OS binaries are different for the PA-RISC system versus the Itanium system. You will have install the OS from scratch on your rx7640.

2) If your additional VGs are on external storage, such as a SAN, then you can 'vgexport' the VGs from the PA-RISC server and 'vgimport' them on the Itanium server.

If you need the data on both servers at the same time you will need to create new VGs on the rx7640 server and restore you data from a backup.

[Tim Nelson]

1 - NO... Cannot load an HPUX 11.11 version on Itanium.

2 - vgexport all volume groups with map file from old server. Take note of lun presentation ( i.e. which luns go with which VG)

After you have cold installed HPUX 11.23 or newer on Itanium server, edited all your configurations, reinstalled all your applications.

1) present old luns to new server
2) create /dev/vgxxx(s) and /dev/vgxxx/group
3) vgimport with map file from old server
4) edit /etc/fstab and create mount points
5) mount disks

Depending on the number of disks and applicaiton complexity this is a big project.

I would approach this in a different manner.
Install new HPUX 11.23 or newer to new server. Present some new disk to server. Install and configure your new application version and test, test, test, test, test, test,test. Then plan your real migration.