vgcreate

[tigm7103105q1]

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

[Geoff Wild]

Is the minor number unique?

ll /dev/vg*/group

Make sure none are the same.

Rgds...Geoff

[Devender Khatana]

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

[Geoff Wild]

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

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

Rgds...Geoff

[Raj D.]

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.

[Raj D.]

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

Cheers,
Raj.

[Thayanidhi]

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

[Manoj Sivan]

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