How can I add a new disk on my HP-UX server

[GauravS]

Friends
Can you please guide me how can I add a new disk to my HP-UX server if it has not contained the root file system / if it contains the root file system.

[Lijeesh N G_1]

Hi Gaurav,

=>Connect the disk

=>Check it with ioscan command whether is is recognised(Claimed) and device file created,

#ioscan -funC disk

=>If device file is not created, create with following command,
#insf -H

Now Disk addidtion is over.

Provide some more infos like,

1) Why do you want to add disk ?
2) Are you using LVM or VxVM ?


Reagrds,
LIJEESH N G

[GauravS]

Thanks Lijneesh for your quick reply.
I am using LVM and there is not enough space available for my root file system.

[Lijeesh N G_1]

Hi Gaurav,

So you need to extend the root file system

You cannot extend root file system like others,
Its required Contiguous PE's.

The recommended way is to extend root file system is,
Boot with ignite backup and modify the file system.

Regards,
LIJEESH N G

[SoorajCleris]

Hi GauravS,

As Lijeesh told, the better way is taking the latest Ignite and restore the same. There you will get an option to modify the VG configuration.

The other option is

Take the backup of /dev/vg00/lvol4 remove /dev/vg00/lvol4 and extend the root there. and recreate the lvol4 and restore the back up of the same.

Normally it will be /tmp.
The process is not easy as ignite, still if there is no way, we can do it.

Regards,
Sooraj

[SoorajCleris]

Hi,
Forgot to ask you onething.
Why root is full?? You may check the usage if it is used by some other files you may create a mount point and mount those directories separately.

Regards,
Sooraj

[R.K. #]

Hello GauravS,

Before extending the root file sys try finding files that are occupying huge space. Use below command to find 20 largest files in root:
# du -kx / | sort -rn -k1 | head -n 20

May be there are some files like core files that you do not need or can safely move them some where else, thus creating space.
If you do not find any such file, then obviously you have to extend it and as mentioned Ignite would be an easier choice.
Also you need to monitor if the size of root is continuously increasing.

Regds,
R.K.

[Roopesh Francis_1]

Gaurav,

check is thre any core or large log files in root file system
using
find / -xdev -name core -print
find / -xdev -name *.log -print
find / -xdev -size +1000000 -exec ls -l {} \;
and free up some space in / file system rather going to extend it.

boot from ignite is the easy way to resize root file system. As root dump and boot should be contiguous.

Thanks

[GauravS]

Thanks friends for your responses. One more thing I want to know for my knowledge that if I want to add a disk that has not contained the root file system then how can I do it?

[Lijeesh N G_1]

Hi Gaurav,

Adding to HP-UX is the same as I mentioned above for a new disk or a used disk;
I mean disk with file system (earlier used one) or without file syetm.

Integrating to LVM,

If it used earlier we have to use -f switch with pvcreate command,
#pvcreate -f


Regards,
LIJEESH N G