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Create volume using LVM over 2 physical disks

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Operating Systems Linux Red Hat Create volume using LVM over 2 physical disks
# 15  
Old 11-09-2012
THANKS Scott for you help.

Do we need to install LVM package, I have an Ubuntu VM machine. Will try and use LVM on this VM.
# 16  
Old 11-09-2012
Quote:
Originally Posted by ikn3
Do we need to install LVM package
No. I can see from the lvmdiskscan output that you posted, you are good to go!
# 17  
Old 11-09-2012
The issue was on RHEL 5.5 which is on VMWare

Quote:
Originally Posted by Scott
So, I just added a new disk to my VM (BTW, you didn't say if you have a physical server or a virtual one):
Code:
[root@RH631d ~]# lvmdiskscan
  /dev/ramdisk       [       16.00 MB] 
  /dev/myvg01/mylv01 [       10.00 GB] 
  /dev/ram           [       16.00 MB] 
  /dev/sda1          [       47.03 MB] 
  /dev/myvg01/mylv02 [       10.00 GB] 
  /dev/ram2          [       16.00 MB] 
  /dev/root          [        3.90 GB] 
  /dev/ram3          [       16.00 MB] 
  /dev/sda3          [        1.97 GB] 
  /dev/ram4          [       16.00 MB] 
  /dev/ram5          [       16.00 MB] 
  /dev/sda5          [       14.08 GB] 
  /dev/ram6          [       16.00 MB] 
  /dev/ram7          [       16.00 MB] 
  /dev/ram8          [       16.00 MB] 
  /dev/ram9          [       16.00 MB] 
  /dev/ram10         [       16.00 MB] 
  /dev/ram11         [       16.00 MB] 
  /dev/ram12         [       16.00 MB] 
  /dev/ram13         [       16.00 MB] 
  /dev/ram14         [       16.00 MB] 
  /dev/ram15         [       16.00 MB] 
  /dev/sdb           [       50.00 GB] LVM physical volume
  /dev/sdc           [       50.00 GB] LVM physical volume
  /dev/sdd1          [        2.30 GB] LVM physical volume
  /dev/sdd2          [        1.53 GB] LVM physical volume
  /dev/sdd3          [      784.42 MB] LVM physical volume
  /dev/sde           [       20.00 GB] 
  4 disks
  19 partitions
  2 LVM physical volume whole disks
  3 LVM physical volumes

[root@RH631d ~]# pvcreate /dev/sde
  Physical volume "/dev/sde" successfully created

[root@RH631d ~]# vgcreate VolumeGroup00 /dev/sde
  Volume group "VolumeGroup00" successfully created

[root@RH631d ~]# lvcreate -L5G -n LogicalVolume01 VolumeGroup00
  Logical volume "LogicalVolume01" created

[root@RH631d ~]# lvcreate -L7G -n LogicalVolume02 VolumeGroup00
  Logical volume "LogicalVolume02" created

[root@RH631d ~]# lvcreate -l100%FREE -n LogicalVolume03 VolumeGroup00
  Logical volume "LogicalVolume03" created

[root@RH631d ~]# lvs
  LV              VG            Attr   LSize  Origin Snap%  Move Log Copy%  Convert
  LogicalVolume01 VolumeGroup00 -wi-a-  5.00G                                      
  LogicalVolume02 VolumeGroup00 -wi-a-  7.00G                                      
  LogicalVolume03 VolumeGroup00 -wi-a-  8.00G

No need to fdisk. No need for fancy partitioning. I can now create my filesystems using these three LV's and I don't have to worry about it.

If, later on, I want to extend these filesystems, I can add a new disk, extend the VG, extend the LV, then easily extend the FS. It's hard to do that if you have partitioned everything, absolutely, with fdisk.
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