Re: NetBSD on Raspberry Pi with LVM ?

[Andy Ruhl <acruhl%gmail.com@localhost>]

On Mon, Nov 3, 2014 at 7:37 AM, Dannis 't Hart <dannisthart%gmail.com@localhost> wrote:
> Hi,
>
> If anyone is interested, I thought I'd share my little experiment with
> NetBSD on Raspberry Pi.
>
> Already enjoying my RPi model B with linux/RaspBMC on it, I decided to
> try and build a little fileserver with a second RPi. I bought a newer
> model B+, plugged in a powered USB-hub, and attached 2 hard drives (2 TB
> each) to that. My first choice would probably be OpenBSD since I use
> that for my firewall, but from what I read, there is little chance of
> getting OpenBSD to work on RPi. NetBSD must be the next-best-thing, then
> :-)
>
> So, this is all pretty easily done. First I tried an image evbarm from
> HEAD as found on nyftp.netbsd.org. But I found it little work to install
> VirtualBox on my Windows laptop (amd64), install NetBSD under that, and
> use the famous build.sh to cross-compile for RPi (-m evbarm -a
> earmv6hf). This all works just fine, and speedily.
>
> But now the issue I am confronted with. I want to use LVM to
> transparantly combine partitions on 2 different disks. Although I think
> the NetBSD Guidebook and manpages are not particularly clear on it, I
> got it to work. But not satisfactorily yet, with respect to do stuff
> automatically.
>
> I need to load the module dm (pseudo-device dm # device-mapper) for LVM
> to work. But it won't, because the securelevel is already up to 1. I can
> boot into single user mode, modload dm, and exit to multi-user. Then I
> can use LVM, although it seems I still need to manually 'vgchange -a y'
> to activate it, before I can actually mount my logical volume.
>
> Another strange thing, I added 'pseudo-device dm' to my kernel
> configuration file, but it doesn't seem to help, it seems it is not
> included in the kernel, but still built as an LKM.
>
> Can anyone tell me the secret incantations to resolve these little
> issues? It works for now, but I have to go via single user mode.

Sorry, no help here, but I'm interested in knowing how that is
working? I've heard that bandwidth on the RPI is not good with NetBSD,
and for that reason I haven't used NetBSD on it too much.

Andy