topic Re: Create VG withmount minor/major number? in Operating System - HP-UX

Create VG withmount minor/major number?

bullz — Wed, 09 Sep 2009 05:06:50 GMT

Hello Guruz,

Is it possible to create VG without group detail like major/minor number?

Or is it possible to assign the default majo/minor number?

Server model is ia64

Re: Create VG withmount minor/major number?

Torsten. — Wed, 09 Sep 2009 05:16:21 GMT

Do you talk about the mknod command like this:

#mknod/dev/vgnew/group c 64 0x010000

A vgcreate in LVM version 2.x creates the group file automagically.

Re: Create VG withmount minor/major number?

Lijeesh N G_1 — Wed, 09 Sep 2009 06:05:29 GMT

Hi,

1)Is it possible to create VG without group detail like major/minor number?
==>group file is required.
Which is your OS version??
In 11.31, no need to create it manually , vgcreate command will create it.
In 11.23, you have to create it manually.
2)Or is it possible to assign the default majo/minor number?
==>No,...

Regards,
LIJEESH N G

Re: Create VG withmount minor/major number?

bullz — Wed, 09 Sep 2009 09:52:56 GMT

My lvm version is

LVMProvider R11.23.007 CIM/WBEM Provider for LVM,

but i am unable to create VGs automaticaly.

Re: Create VG withmount minor/major number?

Torsten. — Wed, 09 Sep 2009 09:54:33 GMT

Your LVM version is version 1 if you run 11.23.

Only 11.31 has version 2.0 or 2.1.

In this case you need to use SAM or create the group file manually.

Any problem with this?

Re: Create VG withmount minor/major number?

Torsten. — Wed, 09 Sep 2009 10:10:25 GMT

Re: Create VG withmount minor/major number?

Lijeesh N G_1 — Wed, 09 Sep 2009 10:33:16 GMT

Hi,

I would suggest you to read docs about Managing LVM, Here is links for some good dosc about LVM.

===LVM Docs links======
http://pagesperso-orange.fr/hvelasco.admin/LVM%20HP-UX/root.htm

http://docs.hp.com/en/B2355-90950/ch09s01.html
http://h20311.www2.hp.com/hpux11i/cache/324830-0-0-0-121.html

http://docs.hp.com/en/5991-6469/ch06s07.html

http://docs.hp.com/en/oshpux11iv2.html#LVM%20Volume%20Manager

Hope this will help you..

Regards,
LIJEESH N G

Re: Create VG withmount minor/major number?

Bill Hassell — Wed, 09 Sep 2009 17:17:45 GMT

> LVMProvider R11.23.007 CIM/WBEM Provider for LVM

This is the WBEM module to provide information for centralized web page managers such as HP's System Insight Manager.

There is no default number for the group file---you must pick a minor number value that is not duplicated. Just like the password file, to create a new entry, you must sort all the existing group files by minor number, then pick and unused value. This is slightly tricky because the minor number is in hex.

Here is a portion of a VG creator script that finds the first unused hex number pair:

set -A HEX 0 1 2 3 4 5 6 7 8 9 a b c d e f
HEX1=0
HEX2=0
# Find all the used group files - skip anything that isn't a group special file

USED=$(ll /dev/*/group | awk '/64 0x/ {print $6}' | sort)

# Search for 1st unused minor number
for TENS in ${HEX[@]}
do
for ONES in ${HEX[@]}
do
[ $(echo $USED | grep -c 0x${TENS}${ONES}0000) -eq 0 ] && break 2
done
done
if [ "$TENS$ONES" = "ff" ]
then
echo "\nUnable to find an unused group ID in:"
ll /dev/*/group | grep "64 0x"
echo "\nNo VG created\n"
exit 1
fi
echo "Next minor number is 0x${TENS}${ONES}0000"

Re: Create VG withmount minor/major number?

bullz — Thu, 10 Sep 2009 08:34:32 GMT

Thanks all