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Re: Activate second volume group at boot



Stuart Sears wrote:
On 03/01/09 23:09, Eric Brunson wrote:
I have an external drive that I've created a second volume group on.
 I've done a bit of poring over the init scripts in my /etc and in
the initrd image, but there doesn't seem to be any facility to
activate anything but VolGroup00 during the boot sequence.

what do you mean by 'activate' ?

acknowledge the existence of?

okay, just add the usb-storage module to your initrd.
something like this should do the trick:

mkintrd --with="usb-storage" -v -f /boot/initrd-$(uname -r).img \
$(uname -r)

That fixed it, thanks a bunch, Stuart.
I'll have to do that after every kernel upgrade, though, won't I?


then reboot with the disk plugged in and turned on.

The script within the initrd does a 'vgscan' so as long as the pv is
visible, the volumegroup *should* appear. It will not be automatically
mounted.

if you want the vg to be detected whenever you attach the external drive
then a udev rule with a RUN= instruction (that runs pvscan and vgscan) might do this for you.

There's something in the netfs script, but from what I can
unconvolute (comments in code are a Good Thing[tm]), it's not what
I'm looking for. I can write my own init script, but I was wondering
if there's already a facility to do it that I've missed, I prefer to
use the Fedora Way if it exists.


incidentally, *why* have you put a volumegroup on an external disk? Seems like an odd thing to do.


Why wouldn't I? It's a 2TB raid array, I want the flexibility that LVM offers. I've been using LVM since AIX 3.2, I don't know why anyone wouldn't use it. :-)



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