[linux-lvm] Creating a new partition /dev/hda5

[linux-lvm] Creating a new partition /dev/hda5

[faryalb]

I have Fedora Core4 installed on my machine and trying to make mythtv work for
me. I understand I need to create a new partition /dev/hda5 and mount /video
file system. I've done some reading on LVM and come up with following commands
to install the new partition on my machine. I need to have them verified by
experts as I don't want to risk losing any data on my hard. 

#pvcreate /dev/hda5
#vgcreate VolGroup00 /dev/hda5
#lvcreate -L50G -name video VolGroup00
#mount /dev/hda5/video
#mount -0 remount,resize /video


Below is the information on my machine: 

[root@localhost mytv]# /sbin/lvm.static vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "VolGroup00" using metadata type lvm2
[root@localhost mytv]# /sbin/lvm.static vgdisplay
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               111.69 GB
  PE Size               32.00 MB
  Total PE              3574
  Alloc PE / Size       3573 / 111.66 GB
  Free  PE / Size       1 / 32.00 MB
  VG UUID               xdWgpi-74QQ-jgfK-EAzc-ojid-Geuo-HsyGA4

[root@localhost mytv]# /sbin/fdisk -l

Disk /dev/hda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1          13      104391   83  Linux
/dev/hda2              14       14593   117113850   8e  Linux LVM



Please let me know if the above commands are correct or not.


Thanks,

Bita

Re: [linux-lvm] Creating a new partition /dev/hda5

[Dieter Stüken]

faryalb@telus.net wrote:
> 
> I have Fedora Core4 installed on my machine and trying to make mythtv work for
> me. I understand I need to create a new partition /dev/hda5 and mount /video
> file system. I've done some reading on LVM and come up with following commands
> to install the new partition on my machine. I need to have them verified by
> experts as I don't want to risk losing any data on my hard. 
> 
> #pvcreate /dev/hda5
> #vgcreate VolGroup00 /dev/hda5
> #lvcreate -L50G -name video VolGroup00
> #mount /dev/hda5/video
> #mount -0 remount,resize /video

Seems your understanding of logical volumes and partitions is a bit 
confused. First you have a physical disk (/dev/hda). Your "fdisk -l" 
shows me, that you have divided (partitioned) your disk into two 
partitions hda1 and hda2, where hda2 contains your LVM data.

So, you won't think about any additional partitions, because there is no 
space left next to hda1 and hda2. But you want to distribute the disk 
space within your volume group (named VolGroup00, located within hda2). 
This has nothing to do with "partitions" any more. Instead you create a 
"logical volume" (lv) named "video", which is a part of your volume 
group. Thus its device path becomes "/dev/VolGroup00/video". Before you 
can mount it, you have to "format" this volume (see mkfs).

However, your "vgdisplay" shows me, that you already used all space of 
your volume grop (Free  PE / Size 1 / 32.00 MB), too. So it seems you 
already performed some "vgcreate" and "lvcreate".
Can you please do a "lvdisplay" or "lvs" to show us the current content 
of your VolGroup00.

What do you intend using "-O remount,resize"?

Dieter.
-- 
Dieter St�ken, con terra GmbH, M�nster
     stueken@conterra.de
     http://www.conterra.de/
     (0)251-7474-501