topic Re: vgcreate in Operating System - HP-UX

vgcreate

tigm7103105q1 — Fri, 09 Sep 2005 21:19:25 GMT

HI, I need you help,
whene I do "vgcreate /dev/vg05 /dev/dsk/x10t4d3" return the message "Cannot the open file /dev/vg05/group" and if exist.
Thanks

Re: vgcreate

Geoff Wild — Fri, 09 Sep 2005 21:28:44 GMT

Is the minor number unique?

ll /dev/vg*/group

Make sure none are the same.

Rgds...Geoff

Re: vgcreate

Devender Khatana — Fri, 09 Sep 2005 23:30:31 GMT

Hi,

Either minor number is not unique or the group file is not created itself. Is it ?

#mkdir /dev/vg05
#mknod /dev/vg05/group c 64 0x??0000

( Where ?? is the unique number confirm by "ll /dev/*/group", normally should be 05 for vg05 if the sequence has been maintained earlier)

#vgcreate /dev/vg05 /dev/dsk/c10t4d3

(Also note the typo in the device file name)

HTH,
Devender

Re: vgcreate

Geoff Wild — Sat, 10 Sep 2005 01:24:07 GMT

To elaborate, the minor number should be hex...

So vg05, minor 05
vg10, minor 0a
etc...

Rgds...Geoff

Re: vgcreate

Raj D. — Sat, 10 Sep 2005 01:49:17 GMT

Hi Tigm ,

It seems you have not created the group file hence the error .

You can do as following:

1. Create the new vg directory.
# cd /dev
# mkdir vg05

2. Create the unique group file
# ls -l /dev/*/group [ to check all the group files ]
# mknod group c 64 0x050000
[ 0x050000 has to be unique , 0x0N0000 (replace N with unque number).

3. vgcreate /dev/vg05 /dev/dsk/x10t4d3

4. vgdisplay -v /dev/vg05 | more

Cheers ,
Raj.

Re: vgcreate

Raj D. — Sat, 10 Sep 2005 01:54:48 GMT

Need to create the group file under /dev/vg05 I missed that.
( # cd /dev/vg05/ )

Cheers,
Raj.

Re: vgcreate

Thayanidhi — Sun, 11 Sep 2005 01:44:35 GMT

Hi,
The kernel parameter maxvgs also affects the group file minor number! By default the maxvgs is set to 10. If so your group file's minor number shouldn't exceed 10 (0a - in hex).

Regds
TT

Re: vgcreate

Manoj Sivan — Sun, 11 Sep 2005 21:35:57 GMT

Hi There,

There are couple of things u need to check.

1. ll /dev/vg*/group and check whether the number u have selected is unique.

2. If you have not created the group file please complete the same first with
#mkdir /dev/vg05
#mknod /dev/vg05/group c 64 0x##0000. The ## number can be selected after verifying the output of ll /dev/vg*/group .

3. After this u can execute the vgcreate command.

If the error repeates, need to check the maxvgs kernel parametre.

cheers

manu