Doesn't create /dev/vg*/group file mknod command on hp-ux11i v3

[Unix-Support]

I created new VG on HP-UX v3 and later want to rename the vgda1 to vgxa1.
So I used vgexport –s –m /tmp/vgda1.map /dev/vgda1 to export the vg.
Then created new directory for new vgname as
#mkdir /dev/vgxa1
And then tried to create node file using
#mknod /dev/vgxa1/group c 64 0x020000 .

But it’s not creating the group file and even not throwing any error message after executed mknod command.


xxxx:root/dev>mkdir /dev/vgtest
xxxx:root/dev>mknod /dev/vgtest/group c 64 0x020000
xxxx:root/dev>ll /dev/vgtest/group
/dev/vgtest/group not found
xxxx:root/dev>cd /dev/vgtest/
xxxxroot/dev/vgtest>ll

Same problem if I try creating new node file using mknod command

Could you please assist in order to get create the group file under /dev/vg**/ ?

[Torsten.]

I still have problems to find the appropriate manuals on BSC

http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1425824


but I'm sure the vgimport command will create the group file automagically (since 2008 or 2009 release).

[Torsten.]

see

http://docs.hp.com/en/5992-6576/ch03s03.html#bajhhfje

[Unix-Support]

below is the error if do vgimport without having group file.
xxxx:root/dev>vgimport -s -m /tmp/vgda1.map /dev/vgxa1
vgimport: "/dev/vgxa1/group": not a character device.
xxxx:root/dev>

[Prasanth Thomas]

Hi,

please let me know th eout put of the below command.
ll /dev/*/group

Regrads,
Prasanth Thomas.

[Laurent Menase]

you should try a ls -l /dev/vgtest to check if there is no hidden characters
else probably a tusc.

[Unix-Support]

please find the output
xxxx:root/>ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Feb 22 16:58 /dev/vg00/group
crw-r----- 1 root sys 64 0x030000 May 14 14:43 /dev/vgda2/group
xxxx:root/>

[Torsten.]

What is your 11.31 release?

Did you try the vgimport as mentioned in the link above?

[Unix-Support]

xxxx:root/>vgimport -v -N -m /tmp/vgda1.map /dev/vgxa1
Usage: vgimport
[-p]
[-v]
[-s]
[-m MapFile]
[-N]
VolumeGroupName PhysicalVolumePath...
or: vgimport [-p] [-v] [-m MapFile] -f InFile VolumeGroupName
xxxx:root/>

[James R. Ferguson]

Hi:

I agree with Laurent's thinking: look for special characters that mask finding the name you expect:

# ls -lb /dev/vg*

...will show non-printing characters as octal.

Regards!

...JRF...

[Unix-Support]

xxxx:root/dev/vgxa1>ls -lb /dev/vg*

/dev/vg00:
total 0
crw-r----- 1 root sys 64 0x000000 Feb 22 16:58 group
brw-r----- 1 root sys 64 0x000001 Mar 26 15:32 lvol1
brw-r----- 1 root sys 64 0x000002 Feb 22 16:58 lvol2
brw-r----- 1 root sys 64 0x000003 Feb 22 16:58 lvol3
brw-r----- 1 root sys 64 0x000004 Feb 22 16:58 lvol4
brw-r----- 1 root sys 64 0x000005 Feb 22 16:58 lvol5
brw-r----- 1 root sys 64 0x000006 Feb 22 16:58 lvol6
brw-r----- 1 root sys 64 0x000007 Feb 22 16:58 lvol7
crw-r----- 1 root sys 64 0x000001 Feb 22 16:58 rlvol1
crw-r----- 1 root sys 64 0x000002 Feb 22 16:58 rlvol2
crw-r----- 1 root sys 64 0x000003 Feb 22 16:58 rlvol3
crw-r----- 1 root sys 64 0x000004 Feb 22 16:58 rlvol4
crw-r----- 1 root sys 64 0x000005 Feb 22 16:58 rlvol5
crw-r----- 1 root sys 64 0x000006 Feb 22 16:58 rlvol6
crw-r----- 1 root sys 64 0x000007 Feb 22 16:58 rlvol7

/dev/vgda2:
total 0
crw-r----- 1 root sys 64 0x030000 May 14 14:43 group
brw-r----- 1 root sys 64 0x030001 May 17 14:05 lvtss6
crw-r----- 1 root sys 64 0x030001 May 17 14:05 rlvtss6

/dev/vgtest:
total 0

/dev/vgxa1:
total 0
xxxx:root/dev/vgxa1>

[Torsten.]

What is your 11.31 update release?

Is this a LVM 1.0 or 2.x group?

"...
major is the major number for the group device file. For a Version 1.0 volume group, it is 64. For a Version 2.x volume group, it is 128."

[Prasanth Thomas]

Hi,
please run the below commands and let me know the o/p

#cd /
#mkdir /dev/vgxx
#mknod /dev/vgxx/group c 64 0x010000

xx- vg extension which you need.

Rgds,
PT.

[Laurent Menase]

also check a
# which mknod
# what /usr/sbin/mknod
use
/usr/sbin/mknod in place of a simple mknod
to be sure there is no alias

[singh sanjeev]

did you note the minor before exporting the vgda1.

if not then try wiht minor number consecutive of vg00, as i can see 0x030000 is assign to vgda2.

First remove what you have created :

#mkdir /dev/vgxa1
#mknod /dev/vgxa1/group c 64 0x010000

then do
vgimport -sv -m vgax1

All the best....

[Unix-Support]

Hi Torsen,
this is for your reply.
Below have attached the LVM, kernel Bundle and patch verison on my server.
Vgdisplay and lvmadm command doesn't show the LVM verison,

xxxx:root/dev>swlist -l product|grep LVM
LVM B.11.31 LVM
LVM-Core B.11.31 HP-UX Kernel support for the logical volume manager
LVM-MirrorDisk B.11.31 MirrorDisk/UX
PHKL_39606 1.0 PRM/FSS cumulative patch with LVM enhancement
xxxx:root/dev>swlist | grep -E "gold|qpk|Bundle"
# Bundle(s):
BUNDLE B.2010.05.08 Patch Bundle
Base-VXFS B.11.31 Base VxFS File System 4.1 Bundle for HP-UX
Base-VXVM B.4.10.032 Base VERITAS Volume Manager Bundle 4.1 for HP-UX
OnlineDiag B.11.31.01.03 HPUX 11.31 Support Tools Bundle, February 2007
QPKBASE B.11.31.1003.347a Base Quality Pack Bundle for HP-UX 11i v3, March 2010
# Product(s) not contained in a Bundle:

[Unix-Support]

Hi Laurent,

This for your reply
xxxx:root/dev>which mknod
/sbin/mknod
xxxx:root/>/sbin/mknod /dev/vgxa1/group c 64 0x020000
xxxx:root/>ll /dev/vgxa1/group
/dev/vgxa1/group not found
xxxx:root/>

[Prasanth Thomas]

for lvm version please run the vgdisplay command.

[Prasanth Thomas]

what is the o/p of ls -ltr /dev ?

[stephen peng]

how to find out the LVM version? vgdisplay does not tell anything about it

[Unix-Support]

Hi Prasanth & Sanjeev

I tried with new minor number and vgname but still having same issue.
xxxx:root/dev>mkdir /dev/vgtest1

xxxx:root/dev>ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Feb 22 16:58 /dev/vg00/group
crw-r----- 1 root sys 64 0x030000 May 14 14:43 /dev/vgda2/group

xxxx:root/dev>/sbin/mknod /dev/vgtest1/group c 64 0x050000

xxxx:root/dev>ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Feb 22 16:58 /dev/vg00/group
crw-r----- 1 root sys 64 0x030000 May 14 14:43 /dev/vgda2/group
xxxx:root/dev>

Vgdisplay command doesn't show the LVM verison.please see below
xxxx:root/dev>vgdisplay -v vgda2
--- Volume groups ---
VG Name /dev/vgda2
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 1
Open LV 1
Max PV 16
Cur PV 8
Act PV 8
Max PE per PV 1717
VGDA 16
PE Size (Mbytes) 64
Total PE 13736
Alloc PE 13736
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

[Prasanth Thomas]

for more details about lvm version please reffer the below link.
https://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=BaseLVM

rgds,
PT.

[Unix-Support]

Hi Prasanth,

please find attached list of files under /dev directory.

[Laurent Menase]

you should also check a what /sbin/mknod and a tusc of it.

[Prasanth Thomas]

vg version

unix:/root# lvmadm -t
rgds,
PT