[Techtalk] Re: moving LVM volume to different computer

[Jeannette]

Whew! I got it fixed. I was running all the commands from the GUI, so that
I could follow these How-tos, and it turned out that the error messages
were only going to the console. Anyway, after moving the drives back and
forth MANY times and rebooting more often than I can count, one time I
just ran the commands from the console, and I got an error message telling
me to run vgscan, which was all it took to get it running! (Well, maybe; I
did check out the major and minor numbers that the node in /dev had on the
working system, and created that by hand on the new system; I don't know
if vgscan would've created it for me or not.

Either way, it is up and running, and I built a new desk today and set up
a tidy computing environment for myself!

Jeannette

On Sat, 12 Mar 2005, Jeannette wrote:

> Hi!
>
> I have had an mp3 server set up for a couple of years, and it is currently
> running Fedora Core 1. At some point in time I learned just enough about
> LVM to set up one 150 GB logical volume. Due to some recent changes, I
> have decided to move this volume to another system I have, so that I only
> have to keep one system running (this system is currently running Fedora
> Core 2).
>
> Unfortunately, I can't get the volume to become active on the new server,
> and I am hoping that someone can point me to the right place for the
> error. I have been following the instructions in various How-Tos, but when
> the instructions finish with "now mount your volume!" my volume is still
> inactive. I don't even have the node in /dev for my volume (I think this
> might be the cause of my problem?)
>
> Here is the output of the steps I have done:
> [root at osiris root]# pvscan
>   PV /dev/hdb   VG mp3_vg   lvm1 [74.52 GB / 0    free]
>   PV /dev/hdd   VG mp3_vg   lvm1 [74.52 GB / 48.00 MB free]
>   Total: 2 [149.05 GB] / in use: 2 [149.05 GB] / in no VG: 0 [0   ]
>
> [root at osiris root]# vgchange -ay mp3_vg
>   0 logical volume(s) in volume group "mp3_vg" now active
>
> On the how-tos I have looked at, there is no indication of what I should
> see as a result of the previous command, but I personally would expect it
> to say that it found one volume group.
>
> Provided for more information:
> [root at osiris root]# lvscan
>   inactive          '/dev/mp3_vg/mp3_lv' [149.00 GB] next free
> [root at osiris root]# lvdisplay
>   --- Logical volume ---
>   LV Name                /dev/mp3_vg/mp3_lv
>   VG Name                mp3_vg
>   LV UUID                000000-0000-0000-0000-0000-0000-000000
>   LV Write Access        read/write
>   LV Status              NOT available
>   LV Size                149.00 GB
>   Current LE             38144
>   Segments               2
>   Allocation             next free
>   Read ahead sectors     10000
>
>
> Do I need to do something to "prepare" this server to use LVM or mknod
> /dev/mp3_vg?
>
> Thanks for any pointers!
>
> Jeannette
>
>