topic Re: vgcreate is hanging while creating volume group. in Operating System - HP-UX

vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:00:17 GMT

Hi Folks,
my problem is as follows. I'm trying to create a new volume group on a new disc. It makes no difference whether I'm using sam or if I do it from a command line with pvcreate,vgcreate and so on.
I am just observing a strange effect that vgcreate process is hanging. I can see:
- /dev/vg01 is created and within it a node to vg: 64 0x010000 Apr 29 18:30 group
- I can see my disc in /etc/lvmtab.
- I can see the vgcreate process which is hanging
And when I take this disc into the existing vg e.g. vg00 he's finished in few seconds.
So I do not really understand why I'm getting these problems when I'm trying to create vg01 with this disc?

Can anyone give any tip?

Regards,
Janusz

Re: vgcreate is hanging while creating volume group.

Jeff Schussele — Thu, 29 Apr 2004 10:05:28 GMT

Hi Janusz,

Make sure you don't have any minor # conflicts

ll /dev/vg* | | grep 0x010000

and see if you get more than one hit.

Rgds,
Jeff

Re: vgcreate is hanging while creating volume group.

Jeff Schussele — Thu, 29 Apr 2004 10:05:53 GMT

Oops - just one pipe required - typo'd that

Jeff

Re: vgcreate is hanging while creating volume group.

Lorenzo Facello — Thu, 29 Apr 2004 10:07:23 GMT

???
Hi J.
I don't understand your problem...
but I give you the right procedure
pvcreate -f /dev/rdsk/cxtxdx
mkdir /dev/vg01
cd /dev/vg01
mknod group c 64 0x010000
vgcreate /dev/vg01 /dev/dsk/cxtxdx
lvcreate -L xx(MB) -n (name-optional) /dev/vg01
newfs -F vxfs /dev/vg01/rlovolx
mkdir /xxx
mount /dev/vg01/rlovolx /xxx

Hope this helps
L.

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:08:46 GMT

Hi Jeff,

I have only vg00 at the moment and I'm for 111% sure I don't have any minor conflict.

Re: vgcreate is hanging while creating volume group.

Marvin Strong — Thu, 29 Apr 2004 10:10:13 GMT

He is asking if the minor number you are using is being used by another volume group.

ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Feb 16 2000 /dev/vg00/group
crw-r--r-- 1 root sys 64 0x110000 Aug 17 2002 /dev/vg01/group
crw-r--r-- 1 root sys 64 0x120000 Aug 17 2002 /dev/vg03/group
crw-r--r-- 1 root sys 64 0x130000 Aug 17 2002 /dev/vg04/group
crw-r--r-- 1 root sys 64 0x140000 Aug 17 2002 /dev/vg07/group
crw-r--r-- 1 root sys 64 0x0a0000 Dec 18 15:56 /dev/vg10/group
crw-r--r-- 1 root sys 64

notice they are all unique.

Re: vgcreate is hanging while creating volume group.

Marvin Strong — Thu, 29 Apr 2004 10:11:27 GMT

oh if you only have vg00 its probably 0x00000 however I would still verify that.

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:13:00 GMT

I know what you mean - I don't have any conflict:
ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Jul 9 2003 /dev/vg00/group
cr--r--r-- 1 root sys 64 0x010000 Apr 29 18:30 /dev/vg01/group

Re: vgcreate is hanging while creating volume group.

Lorenzo Facello — Thu, 29 Apr 2004 10:15:54 GMT

take a look at the permission!!!!
L.

Re: vgcreate is hanging while creating volume group.

Marvin Strong — Thu, 29 Apr 2004 10:15:56 GMT

hmm interesting permissions you have on /dev/vg02/group there. I think it needs to be writeable by owner.

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:17:05 GMT

Hi Lorenzo,

I tried to do it in 2 ways. One way was exactly this one as you described. And it was hanging at vgcreate. I couldn't kill the process the only way to get rid of him was to reboot the machine.

Re: vgcreate is hanging while creating volume group.

Jeff Schussele — Thu, 29 Apr 2004 10:17:32 GMT

Hi Janusz,

Notice the perms on vg01 group - make them

chmod 644 /dev/vg01/group

Rgds,
Jeff

Re: vgcreate is hanging while creating volume group.

Lorenzo Facello — Thu, 29 Apr 2004 10:17:35 GMT

agree with marvin
perms must be:
crw-r----- or
crw-rw-rw

L.

Re: vgcreate is hanging while creating volume group.

A. Clay Stephenson — Thu, 29 Apr 2004 10:18:43 GMT

My best guess, now that minor device numbers appear to be out of the picture, is that you have some corrupt kernel LVM data structures.
I would look for and install the latest LVM and LVM Commands cumulative patch set. Since you didn't bother to identify your OS, it's not possible to identify the needed patches.

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:20:37 GMT

Ok it maybe a permission. So you mean if I change them while the process is running it could take an effect "on the fly" ?

Re: vgcreate is hanging while creating volume group.

Sanjay_6 — Thu, 29 Apr 2004 10:21:13 GMT

Hi,

Suggest you check for patches on your system. Maybe you are missing one of the critical patches.

Hope this helps.

Regds

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:22:13 GMT

Hi Sanyaj,
how can I check it ?

Re: vgcreate is hanging while creating volume group.

Lorenzo Facello — Thu, 29 Apr 2004 10:24:18 GMT

try to erase vg
vgexport vg03...
... patch the system..
and retry.
you install the quality pkg??
what version do you run?
L.

Re: vgcreate is hanging while creating volume group.

Janusz Wojnarowicz — Thu, 29 Apr 2004 10:26:03 GMT

How can I check which patch I need ?

Re: vgcreate is hanging while creating volume group.

Lorenzo Facello — Thu, 29 Apr 2004 10:26:56 GMT

look for patches database in itrc
search by version and by keyword LVM
compare with yours patches on the system...
swlist -l product | grep -i LVM