How to mount an LVM2 filesystem? (Solved)

[williepabon]

Hi:
I was triying to troubleshoot a laptop using my PupRescue stick and found out that my Puppy wasn't able to mount an LVM2 partition. So, I had to stop the activity. Is there an update for Puppy that solves this problem? Thanks.

[rcrsn51]

Try here.

[williepabon]

Try here.

@rcrsn51:

Sorry, I get an error when I try to download from the url you suggested. Are there alternative locations? Thanks.

[rcrsn51]

Are there alternative locations?

You would have to ask tempestuous.

[tempestuous]

LVM dotpet now uploaded to new location. Details here -
http://www.murga-linux.com/puppy/viewto ... 667#483667

[williepabon]

Thank @tempestuous and @rcrsn51. Found the file and installed it. After installation, do I have to do anything else? Because still, the LVM partition doesn't show in the list of mounted drives. Thanks for your help.
wp

[tempestuous]

After installation, do I have to do anything else?

Ooh yes. LVM setup is non-trivial.
I provided the LVM utilities as part of my RAID forum thread, thinking that some RAID configurations might require LVM ... however ...
I don't actually know anything about LVM/LVM2 myself.
But your query has prompted me to do a bit of reading about LVM, mainly from these 2 links -
http://www.linuxquestions.org/questions ... ost4509822
http://superuser.com/questions/116617/h ... lvm-volume
Here's what I THINK you need to do:
First load the dm-mod driver -

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modprobe dm-mod

Scan your system for LVM volumes and identify in the output the volume group name that contains the volume you need -

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vgscan

It will be something like "VolGroup00"

Activate the volume group you just identified -

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vgchange -ay VolGroup00

Find the logical volume that has the files you wish to access -

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lvs

This will list logical volumes. The result(s) will be something like "LogVol00"

Create a mountpoint for your LVM partition. The aforementioned links suggest /mnt/fcroot
but I would think that something like /mnt/lvm would be more intuitive. It's your choice.

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mkdir /mnt/lvm

Finally mount the logical volume -

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mount /dev/VolGroup00/LogVol00 /mnt/lvm

Obviously replace "VolGroup00" and "LogVol00" with your own values.
Now you can access your newly mounted LVM volume at /mnt/lvm

[williepabon]

@tempestuous:

Thanks for answering. I really appreciate your effort to provide a thorough answer to my request, and as you say, this is no trivial matter. In my ignorance I thought it would be a simple app that would run like a daemon, that would detect LVM partitions and would mount them accordingly. You see, I have a PupRescue memory stick that I use to troubleshoot computers, and lately, I've encountered some with LVM partitions. I was looking for a utility that I install on my stick to do the job of detecting and installing LVM partitions. Thank you for your enlightment on this matter and showing me that this is not as simple as I thought. Your diligence on this issue is sincerely appreciated.
wp

[darkcity]

Information now at http://puppylinux.org/wikka/LVM/.