topic create vg01 in Operating System - HP-UX

create vg01

Teck Sim — Thu, 27 Jun 2002 13:09:44 GMT

# vgdisplay
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 2000
VGDA 2
PE Size (Mbytes) 4
Total PE 1023
Alloc PE 296
Free PE 727
Total PVG 0

This is what I did:
#vgdisplay

target 1 8/16/5.2 tgt CLAIMED DEVICE
disk 0 8/16/5.2.0 sdisk CLAIMED DEVICE TOSHIBA CD-ROM XM-570
1TA
/dev/dsk/c0t2d0 /dev/rdsk/c0t2d0
target 2 8/16/5.5 tgt CLAIMED DEVICE
disk 1 8/16/5.5.0 sdisk CLAIMED DEVICE SEAGATE ST34572N
/dev/dsk/c0t5d0 /dev/rdsk/c0t5d0
target 3 8/16/5.6 tgt CLAIMED DEVICE
disk 2 8/16/5.6.0 sdisk CLAIMED DEVICE SEAGATE ST34572N
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0

# mkdir /dev/vg01
# mknod /dev/vg01/group c 64 0x010000
# ll /dev/*/group
crw-r----- 1 root root 64 0x000000 Jun 11 1996 /dev/vg00/group
crw-rw-r-- 1 root sys 64 0x010000 Jun 26 20:41 /dev/vg01/group

#vgcreate /dev/vg01 /dev/dsk/c0t5d0
Increased the number of physical extents per physical volume to 1023.
vgcreate: Volume group "/dev/vg01" could not be created:
Device busy

Did I do anything wrong here.
Please help.
Thanks.

Re: create vg01

Stefan Farrelly — Thu, 27 Jun 2002 13:11:27 GMT

You need to pvcreate your drive first.

pvcreate /dev/rdsk/c0t5d0

If it still returns an error and your'e absolutely sure this drive isnt already in use then add the -f option

pvcreate -f /dev/rdsk/c0t5d0

Then create your vg.

Re: create vg01

Pete Randall — Thu, 27 Jun 2002 13:11:49 GMT

What directory are you in now?
Do a "pwd".

Pete

Re: create vg01

PIYUSH D. PATEL — Thu, 27 Jun 2002 13:12:42 GMT

Hi,

You should start with

1. pvcreate -f /dev/rdsk/c0t5d0

Then use the above commands. The commands you have used are right.

After doing the pvcreate execute the

#vgcreate /dev/vg01 /dev/dsk/c0t5d0

Piyush

Re: create vg01

Teck Sim — Thu, 27 Jun 2002 13:13:12 GMT

#pwd
#/
Thanks.

Re: create vg01

Pete Randall — Thu, 27 Jun 2002 13:13:31 GMT

That's why you've got that fancy headgear, Stefan. I completely missed that.

;^)

Pete

Re: create vg01

Stefan Saliba — Thu, 27 Jun 2002 13:14:47 GMT

first do a vgdisplay -v vg00 and check at the bottom which physical volumes are in this vg. In your case you should only have c0t6d0. if you have c0t5d0 as well then you cannot create vg01 using that disk.

Secondly I think you forgot to pvcreate the disk.

use pvcreate only if you are sure that the disk is not a member of the other vg i.e. vg00.

If you send an output of vgdisplay -v vg00 we can check.

after the pvcreate try again the vgcreate

good luck
stefan

Re: create vg01

PIYUSH D. PATEL — Thu, 27 Jun 2002 13:14:52 GMT

Hi,

Execute the following command :

# strings /etc/lvmtab and see that the /dev/dsk/c0t5d0 is not seen in the output.

Piyush

Re: create vg01

Jeff Schussele — Thu, 27 Jun 2002 13:16:48 GMT

Hi Teck,

Do a
#pvdisplay -v /dev/dsk/c0t5d0
to determine if there is an LVM structure on that disk.
If not then you need to do this before the vgcreate
#pvcreate /dev/rdsk/c0t5d0 (Note: you may need a -f parameter if there's been an LVM structure on it in the past also note the "rdsk")

HTH,
Jeff

Re: create vg01

Teck Sim — Thu, 27 Jun 2002 13:26:09 GMT

# pvcreate /dev/rdsk/c0t5d0
pvcreate: The physical volume already belongs to a volume group
# pvcreate -f /dev/rdsk/c0t5d0
Physical volume "/dev/rdsk/c0t5d0" has been successfully created.
# vgcreate /dev/vg01 /dev/dsk/c0t5d0
Increased the number of physical extents per physical volume to 1023.
Volume group "/dev/vg01" has been successfully created.
Volume Group configuration for /dev/vg01 has been saved in /etc/lvmconf/vg01.cof

and what should I do next? I am trying to create a new file system, let say /dev/vg01/d01 and /dev/vg01/d02 and both will be mounted on /d01 and /d02 respectively.
Thanks.

Re: create vg01

Stefan Saliba — Thu, 27 Jun 2002 13:31:28 GMT

next in line you need to create a logical volume.

lvcreate -L /dev/vg01

then create a new filesystem like newfs -F vxfs /dev/vg01/lvol1

then create a mountpoint say mkdir /mount1

then type mount /dev/vg01/lvol1 /mount1

if you want it to automount put an entry in the fstab

good luck

stefan

Re: create vg01

PIYUSH D. PATEL — Thu, 27 Jun 2002 13:35:08 GMT

Hi,

#lvcreate -L size /dev/vg01
This will create lvol1

#newfs -F vxfs /dev/vg01/rlvol1 ( Use rlvol1)
This will craete filesystem vxfs on lvlol1

#mkdir /mountpoint

# mount /dev/vg01/lvol1 /mountpoint

Mounts the filesystem

Make an ebtry for the filesystem in /etc/fstab so that it will get mounted in the next reboot.

Piyush

Re: create vg01

Deshpande Prashant — Thu, 27 Jun 2002 13:35:55 GMT

Hi
Take a look at following thread from this forum

http://forums.itrc.hp.com/cm/components/FileAttachment/0,,0xeccbc8ecad09d6118ff40090279cd0f9,00.doc

Thanks.
Prashant.

Re: create vg01

Jeff Schussele — Thu, 27 Jun 2002 13:40:19 GMT

Hi (again) Teck,

Do the following
#lvcreate -L xxxx -n d01 /dev/vg01
#lvcreate -L xxxx -n d02 /dev/vg01
where xxxx equals the size in MB.

Then do
newfs -F vxfs /dev/vg01/rd01
newfs -F vxfs /dev/vg01/rd01
Note that you have to use the raw LV for this

Then mount them
mount /dev/vg01/d01 /d01
mount /dev/vg01/d02 /d02

Then to have them mounted at boot time add the following to /etc/fstab
/dev/vg01/d01 /d01 vxfs delaylog,datainlog 0 2
/dev/vg01/d02 /d02 vxfs delaylog,datainlog 0 2

HTH,
Jeff

Re: create vg01

James R. Ferguson — Thu, 27 Jun 2002 13:43:18 GMT

Hi Teck:

Now that you have successfully created the volume group you need to 'lvcreate' a logical volume, and then create a filesystem for it.

For instance, to create a 400MB logical volume named /dev/vg01/d01, do this:

# lvcreate -L 400 -n d01 /dev/vg01

Now, create the filesytem:

# newfs -F vxfs -v -o nolargefiles /dev/vg01/rd01

Note the (r)aw devive file. Note that we have created an journaled filesystem (VxFS).

Lastly, add a mount entry to /etc/fstab, for instance:

/dev/vg01/d01 /mymountpoint vxfs rw,suid,nolargefiles,delaylog,datainlog 0 2

...and mount the new filesystem:

# mount -a

Regards!

...JRF...

Re: create vg01

Jeff Schussele — Thu, 27 Jun 2002 13:43:30 GMT

Ooops...sorry
The 2nd newfs should be

newfs -F vxfs /dev/vg01/rd02

And you do need to create mount point prior to mounting

mkdir /d01 /d02

Jeff

Re: create vg01

Teck Sim — Thu, 27 Jun 2002 13:44:32 GMT

You guys are great!
Thanks for all the info.

Re: create vg01

James R. Ferguson — Thu, 27 Jun 2002 13:47:28 GMT

Hi (again) Teck:

To gain a better understanding of the tasks involved in LVM management, you should read chapter-6 --- Managing Disks and Files in "Managing Systems and Workgroups: A Guide for HP-UX System Administrators":

http://docs.hp.com/hpux/onlinedocs/B2355-90742/B2355-90742.html

If you take the time to do this, you will be well rewarded.

Regards!

...JRF...

Re: create vg01

Rafael M. Ferreira — Thu, 27 Jun 2002 13:53:32 GMT

Teck Sim

To create vg01

1)ioscan -fnC disk
# to see the path of the disk

2)pvcreate -f /dev/rdsk/c0t5d0

3)mkdir /dev/vg01
mknod /dev/vg01/group c 64 0x010000
vgcreate vg01 /dev/dsk/c0t5d0

Regards

Rafael