topic Re: Extending root vol in Operating System - HP-UX

Extending root vol

Warren griggs — Thu, 13 Feb 2003 10:59:38 GMT

Hi All,

I have purchased a couple of 36GB disks to replace my internal 9GB. What I want to do is to break my current mirror and then add a 36GB disk and resync it.

Will it be possible for me to extend the / and /tmp vols after I do this. Unfortunatly I don't have OnlineJFS so thats not an option.

Can anyone let me know if I can and how I would do this?

Thanks in advance,

Colin.

Re: Extending root vol

Armin Feller — Thu, 13 Feb 2003 11:03:31 GMT

Hi,

first check if you are able to add the 36GB disk to vg00 (see vgdisplay and Max_PE_per_PV).

It is NOT possible to extend "/" without using IGNITE/UX and re-install the system.

The "/tmp" filesystem (lvol) can be extended if you are able to umount it. If moiunt doesn't work in multi-user-mode, please boot into SingleUser.

Regards ...
Armin

Re: Extending root vol

Darren Prior — Thu, 13 Feb 2003 11:06:04 GMT

Hi Colin,

I believe the safest method would be to backup and restore the system using Ignite - you will have the option to set lvol sizes before the data is restored.

regards,

Darren.

Re: Extending root vol

Norman_21 — Thu, 13 Feb 2003 11:11:03 GMT

Hi,

Check to see if you can add the disk to vg00:
#vgdisplay /dev/vg00

to extend the /tmp file system
you need to umount the file system and then extend the file system. It is always recommended to do the system administration task in a single user mode. If you have
fsadm you do not need to umount the file system, you can just extend it
#man fsadm for more details
Like Armin said, if you have to extend the /, you'll need to boot from an ignite tape and do the changes.

good luck.

Re: Extending root vol

Warren griggs — Thu, 13 Feb 2003 11:13:29 GMT

Darren,

This machine is fully supported by HP, we will be paying for an engineer to install these disks. Is this a procedure that they are familiar with? And will they have any documentation on this?

Thanks,

Colin.

Re: Extending root vol

T G Manikandan — Thu, 13 Feb 2003 11:15:58 GMT

Hi,

If the internal disk maximum size is 9Gb or less then 36GB you will not able to use the full 36GB when you add the new disks due to the MAX_PE limitation.

the only way would be

creating a ignite tape using the make_recovery_tape

#make_tape_recovery -x inc_entire=vg00 -I -v -a /dev/rmt/0mn

Then you can boot from the tape, choose the Advanced Installation option targeting your new disk. You can resize your filesystems too during the process.

These two docs can throw light on the process you are to take up

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062922008

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000066277518

Thanks

Re: Extending root vol

Darren Prior — Thu, 13 Feb 2003 11:31:58 GMT

Hi Colin,

I believe the engineer will just be replacing the disks, it is the customer's responsibility to perform the backup/recovery sys admin tasks. It would be possible to arrange for the engineer to do this on a chargeable consultancy basis, I guess they'd need you to ensure that you have the backup made before they arrive. It's worth having a chat with your HP contact to check on the specifics for your situation.

There is documentation on http://docs.hp.com for Ignite/UX - it does show some of the screens including changing lvol sizes.

regards,

Darren.