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I am trying to setup LVM for my netbook's two, small SSDs (4 & 8GB). After a lot of trial and error, I followed this walk-through: How to Set Up Multiple Hard Drives As One Volume. I have completed the steps for my 4GB volume (/dev/sda) and successfully set up a VG ("vgsystem") and LV ("lvfacade"). However, when repeating the steps for the 8GB volume (/dev/sdb1), I was unable to extend "vgsystem" to include /dev/sdb1 because I had added it to a VG ("vgsystem2") earlier. How can I remove "vgsystem2" and add /dev/sdb1 to "vgsystem"?

I appreciate the help.

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Chad
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1 Answers1

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vgremove vgsystem2

vgextend vgsystem /dev/sdb1

I am assuming that /dev/sba1 on the last line actually means /dev/sdb1

Edit 1

You don't need to run partprobe after the reboot. But it wouldn't hurt.

pvscan tells you that you have 2 lvm2 devices (/dev/sda1 and /dev/sdb1). In addition to that sda1 is fully used for volume group vgsystem.

Not surprisingly pvcreate fails because /dev/sda1 is already a physical volume.

Not surprisingly vgcreate fails because vgsystem already exists.

/dev/sda1 looks a bit small. Do you have /dev/sda2 or perhaps unpartitioned space on /dev/sda?

I am not sure what you are trying to achieve

If you want to remove VG vgsystem from /dev/sda1 use pvremove vgsystem

If you want your 2 devices to be treated as a single logical volume you need to expand volume group vgsystem to sdb1 and then create a logical volume:

vgextend vgsystem /dev/sdb1
lvcreate -l 100%VG -n lvsystem vgsystem

then you should be able to make a filesystem on /dev/lvsystem, mount it and use it.

Edit 2

Umm, I haven't forsaken you. Please re-read what I wrote between Edit 1 and Edit 2. Did you try running any of the commands? What was the output? What is your answer for "Do you have /dev/sda2 or perhaps unpartitioned space on /dev/sda?"?

It would be nice to know what exactly are you trying to achieve. This will help me help you.

sмurf
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