Create volume using LVM over 2 physical disks Post: 302728225

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Operating Systems Linux Red Hat Create volume using LVM over 2 physical disks Post 302728225 by Scott on Wednesday 7th of November 2012 01:24:57 PM

11-07-2012

Administrator Emeritus

It looks like you already created the physical volumes. What does pvs display?

It's not totally clear what you are asking, but if I understand, you want to "combine" the disks /dev/sdb and /dev/sdc. You can do this in as much as adding them to the same volume group.

Code:

# vgcreate myvg01 /dev/sdb /dev/sdc

You can then create three logical volumes, one each for /u01, /u02 and /u03

i.e.

Code:

[root@RH631d ~]# lvcreate -L10G -n mylv01 myvg01
  Logical volume "mylv01" created

Then you can create the filesystem using the LV's.

(far from optimal, but quick for me to show...)
[code]

Code:

[root@RH631d ~]# mkfs -t ext3 /dev/mapper/myvg01-mylv01
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
1310720 inodes, 2621440 blocks
131072 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
[root@RH631d ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda2              3960348   2536864    196924  93% /
/dev/sda5             14301224    167312  13395728   2% /home
/dev/sda1                46633     11178     33047  26% /boot
tmpfs                   512360         0    512360   0% /dev/shm
.host:/              829127300 740882960  88244340  90% /mnt/hgfs
[root@RH631d ~]# mkdir /u01
[root@RH631d ~]# mount /dev/mapper/myvg01-mylv01 /u01
[root@RH631d ~]# df -hP
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda2             3.8G  2.5G  193M  93% /
/dev/sda5              14G  164M   13G   2% /home
/dev/sda1              46M   11M   33M  26% /boot
tmpfs                 501M     0  501M   0% /dev/shm
.host:/               791G  707G   85G  90% /mnt/hgfs
/dev/mapper/myvg01-mylv01  9.9G  151M  9.2G   2% /u01

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LEARN ABOUT SUSE

vgreduce

VGREDUCE(8)						      System Manager's Manual						       VGREDUCE(8)

NAME

       vgreduce - reduce a volume group

SYNOPSIS

       vgreduce  [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi-
       calVolumePath...]

DESCRIPTION

       vgreduce allows you to remove one or more unused physical volumes from a volume group.

OPTIONS

       See lvm for common options.

       -a, --all
	      Removes all empty physical volumes if none are given on command line.

       --removemissing
	      Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes  normal
	      operation of the volume group (new logical volumes may again be created, changed and so on).

	      If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove
	      them manually, you can run this option with --force to have vgreduce remove any partial LVs.

	      Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those  parts
	      that lie on disks that are still present.

	      If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti-
	      vating your logical volumes with --partial as described in lvm (8).

SEE ALSO

       lvm(8), vgextend(8)

Sistina Software UK					 LVM TOOLS 2.02.67(2) (2010-06-04)					       VGREDUCE(8)

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vgreduce