vgcreate failed

[Luca Frigatti]

Hi All!
I try to create a new volume group on my server and I received the following error message :
vgcreate: Cannot open the control file "/dev/vg_rwh_1/group":
No such device

The command that I use is the follow :
vgcreate -e 5000 /dev/vg_rwh_1 /dev/dsk/c0t8d1

The maxvgs parameter in the kernel is 30.
The vg that I create on this server are 20.

Any idea?

TIA.

Regards.

[Rita C Workman]

Did you...
mkdir /dev/vg_rwh_1/group
mknod /dev/vg_rwh_1/group c 64 0xnn0000

and then:
vgcreate -e 5000 /dev/.....

Rgrds,
Rita

[Chris Wilshaw]

Have you created the directory and group file for the VG?

mkdir /dev/vg_rwh_1
mknod /dev/vg_rwh_1/group c 64 0x0N0000

(where N is an arbitrary number for your VG, best suggestion is to increase this by one from your existing highest value)

pvcreate /dev/rdsk/c0t8d1

then your vgcreate command should work.

[Luca Frigatti]

I've the following situation :

/dev/vg_rwh_1:
total 10
drwxr-xr-x 2 root sys 1024 Sep 3 14:31 .
dr-xr-xr-x 34 oracle dba 4096 Sep 3 14:31 ..
crw-r----- 1 root sys 64 0x200000 Sep 3 14:31 group
pvcreate /dev/rdsk/c0t8d1
Physical volume "/dev/rdsk/c0t8d1" has been successfully created.
6981 root@devux!/ $ vgcreate -e 5000 /dev/vg_rwh_1 /dev/dsk/c0t8d1
vgcreate: Cannot open the control file "/dev/vg_rwh_1/group":
No such device

TIA.

Regards

[James R. Ferguson · Accepted solution]

Hi:

Did you create the device file with 'mknod' and specify a unique minor number?

Remember that the minor number is expressed in hexadecimal, so if you used '20' you really have a decimal minor number of '32' -- too large for the 'maxvgs'.

Regards!

...JRF...

[Vincent Farrugia]

Hello,

I saw this thread and didn't mind replying because there were already 2 good replies. Rita Workman and Chris Wilshaw's answers are both very correct, and were given to you before that of JRF, so you should assign them 10 points as well.

Assign me 0 points please.

Thanks,
Vince