no LVM info found when running vgcreate

[vz7r1x]

Hi Folks.

I have a HP (PA-RISC) running 11.11 HPUX OS.

I ran into an issue while doing vgcreate. vgcreate could not find LVM info.
What step could be missing??

I ran the following:
mknod /dev/vg04/group c 64 0x120000
vgcreate /dev/vg04 /dev/dsk/c11t1d5

box:/dev # ls -l /dev/vg04
total 0
crw-r----- 1 root sys 64 0x120000 Oct 2 11:12 group



box:/dev # ls -l /dev/dsk/c11t1d5
brw-r----- 1 bin sys 31 0x0b1500 Oct 2 10:10 /dev/dsk/c11t1d5



box:/dev # vgcreate /dev/vg04 /dev/dsk/c11t1d5
vgcreate: Physical Volume "/dev/dsk/c11t1d5" contains no LVM information
box:/dev #


Thanks

[Duncan Edmonstone]

So did you remember to pvcreate /dev/dsk/c11t1d5
first?

HTH

Duncan

[vz7r1x]

Hi Duncan,

I ran that command but got this error:

box: pvcreate /dev/dsk/c11t1d5
pvcreate: "/dev/dsk/c11t1d5": not a character device.


Thanks

[Duncan Edmonstone]

ah so did you try:

pvcreate /dev/rdsk/c11t1d5

which *is* a character device?

Duncan

[Michael Steele_2]

HI

'pvcreate' is alway performed with a raw device,

pvcreate /dev/rdsk

http://docs.hp.com/en/B9106-90008/pvcreate.1M.html

[vz7r1x]

Hi,

I was able to create PV but I ran into another problem in the next step, lvcreate does not see /dev/vg04 althought it is there:

box:/home# lvcreate -L 716784 /dev/vg04

lvcreate: Volume group "/dev/vg04" does not exist in the "/etc/lvmtab" file.

box:/home# ls -l /dev/vg04
total 0
crw-r-----1 root sys 64 0x120000 Oct 2 11:12 group

any hints?

Thanks

[Pete Randall]

> any hints?

Yes. Back away from the keyboard.

Seriously, you need to spend a little time learning basic LVM concepts before you leap into these things. Start here:

http://docs.hp.com/en/B2355-90950/ch06.html


Pete

[Prashanth.D.S]

Hi,

Seems like u r very new to lvm..

procedure goes like this

1. pvcreate
2. mkdir /dev/vg04
3. mknod
4. vgcreate
5. lvcreate
6. mkdir
7. newfs
8. mount ur lvol

Hope this helped you now start over everything from scratch.

Best Regards,
Prashanth

[Torsten.]

Two options:

1)
- read the docs for basics
- use CLI to create

2)
- read the docs for the basics
- use SAM to create

2) maybe easier to do, 1) will help you to understand what you do

[Michael Steele_2]

Oh man

You need to take the class. You have absolutely no knowledge of LVM or HP-UX whatsoever.