Hi, and thanks for the response. Unfortunately it is still not working. For completeness, I have: device-mapper: 4.4.0-ioctl (2005-01-12) (Kernel) device-mapper 1.01.03 (Userspace) On Saturday 11 February 2006 09:19 pm, Zac Slade wrote: > On Sunday 22 January 2006 13:53, Geoff Mishkin wrote: > > I am using lvm2 2.01.09 on Gentoo Linux. My kernel version is 2.6.15 and > > I'm using udev 079. > > I'm running 2.6.15 also using lvm > > > I am trying to set up an LVM2 VG using a loop device. My problem is that > > device nodes are never created for my VG. However, my VG shows up in > > scans (vgscan) and displays (vgdisplay). Even vgscan --mknodes does not > > make the nodes. Because I never get a node for my VG, I can't figure out > > how I am supposed to create LV's in it. > > First make sure that /etc/lvm/lvm.conf is not filtering out /dev/loop/ > devices. Based on the ouput you gave from pvcreate I guess that it isn't, > but you should double check anyway. Also read through the options in that > file one might jump out at you. > I checked this and it is fine. No other options jump out at me. > > I have the modules loop, dm-mod and dm-snapshot loaded. Therefore, I do > > have /dev/mapper/control. Here is what I have done so far: > > dm-mod is the only required module. Well and loop for your set up. > Okay well I suppose I'd need dm-snapshot eventually if I ever get this part working. :) > > It looks like my VG is there, but it still isn't showing up in /dev. I > > read something about how if udev isn't configured properly, you will get > > devices like /dev/dm-# where # is 0-9, instead of named VG nodes. I > > don't have those either, but I follow the instructions which are to > > uncomment a line in my udev rules: > > > > KERNEL=="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", NAME="%k", > > SYMLINK+="%c" > > I looked at my /etc/udev/rules.d/50-udev.rules and I have the following: > # dm devices (ignore them) > KERNEL=="dm-[0-9]*", OPTIONS="ignore_device" > # create a symlink named after the device map name > # note devmap_name comes with extras/multipath > #KERNEL=="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", NAME="%k", > SYMLINK+="%c" > KERNEL=="device-mapper", NAME="mapper/control" > Now this is interesting. So you say that you have working volume groups on loop devices? But you still have the "ignore_device" option active. So I went backed and switched this in my udev rules but it still didn't work. > I'm just not sure why they aren't getting created. Even without vgscan you > should get the devices if you are using udev. Maybe you upgraded udev and > zapped the new rules during and etc-update or dispatchconf. I'm pretty careful about doing etc-update, and that section of my udev rules now looks the same as yours. Is there anything else specific you think the problem could be? --Geoff Mishkin <gmishkin@bu.edu>
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