topic Re: Managing FileSystems in Operating System - HP-UX

Managing FileSystems

panchpan — Tue, 16 Oct 2007 21:31:29 GMT

I have got 2 FileSystems visible when I use df -k command /u00 and /u01 of 5 GB and 10 GB respectively. Can you please let me know exact commands to execute for below:

1) Delete /u00
2) Modify /u01 from 10 GB size to 5 GB size
3) Create /u02 (new fs) of size 10 GB

Thank you!

Re: Managing FileSystems

A. Clay Stephenson — Tue, 16 Oct 2007 21:43:56 GMT

How can anyone let you know the exact commands when you don't supply the exact data?

You don't bother to indicate if you are running whole disks, LVM, or VxVM. You don't bother to indicate if you have OnlineJFS and yet you want exact steps.

Re: Managing FileSystems

panchpan — Tue, 16 Oct 2007 22:58:10 GMT

I am sorry for providing incomplete info. I am not using any volume manager or veritas. They are the generic basis filesytems.

/dev/dsk/c0d0s3

Re: Managing FileSystems

whiteknight — Wed, 17 Oct 2007 02:43:03 GMT

panchalp,

Do you have online JFS ?

1) Delete /u00
-> umount /u00
-> lvremove /dev/vgxx/lvolxx => refer to /u00

2) Modify /u01 from 10 GB size to 5 GB size
-> backup /u01 data
-> umount /01
-> lvreduce -L 5000 /dev/vgxx/lvolxx

3) Create /u02 (new fs) of size 10 GB
-> lvcreate -L 10000 /dev/vgxx/lvolxx
-> newfs /dev/vgxx/rlvolxx
-> mount /dev/vgxx/lvolxx /u02

WK

Re: Managing FileSystems

Ivan Krastev — Wed, 17 Oct 2007 02:54:01 GMT

WK is right, only after lvreduce at point 2 add :
#mount /dev/vgXX/lvolXX /u01

regards,
ivan

Re: Managing FileSystems

Srimalik — Wed, 17 Oct 2007 21:29:36 GMT

WK,
LVM is not being used by , will lvreduce/lvextend commands work on a such disks?

sri

Re: Managing FileSystems

Philip Gunter — Wed, 17 Oct 2007 21:44:50 GMT

Hi Panchalp,

given that you want a 5GB and a 10GB partition why not just reuse the ones you've got by unmounting the exiting filesystems and remounting them on the new mount points?

/u00 --> /u01
/u01 --> /u02

Don't forget to update the fstab.

Cheers,
Philip.

Re: Managing FileSystems

Bill Hassell — Thu, 18 Oct 2007 08:47:30 GMT

You wrote:

> I am sorry for providing incomplete info. I am not using any volume manager or veritas. They are the generic basis filesytems.
>
> /dev/dsk/c0d0s3

Since real disks don't come in 5GB and 10 GB sizes, I suspect you are using LVM. This can be verified by using the command:

bdf /u00 /u01 /u02

On the right will be the filesystem mountpoints and on the left will be the source disk. If you are using 'generic' disks then the source will start with /dev/dsk...

But if the left side shows something like /dev/vg01/.... then you are using logical volume manager (LVM). To be completely safe, backup any volume where you are making changes. Reducing a filesystem is almost always destructive.

Now the rest of the commands connot be accurately given because there is not enough information. Start by posting the following commands:

model
uname -r
bdf /u00 /u01 /u02