[ubuntu-us-nc] hey from Carolina Beach

Mark Kempster mark at kempster.org
Wed Apr 16 03:53:35 BST 2008

Without diverging too much from the original thread, yeah - 2 sata disks,
software raid and lvm. My goal was to do raid-1 and be able to pop out a
disk, put it in the safe for backup, pop in a new one and have the raid
reconstruct itself. Add raid pairs (hence the lvm bit) as needed.

I tried plugging in 2 320GB sata drives. I noticed one had gone south (mdadm
was reporting a 'degraded' raid) and asked mdadm to reinitialize the
degraded disk. It did, seemed to pull it back into the raid and all was
happy. About a week later I got up to ~170GB (curious that it's near half of
320) and the disk was being reported as full.

I'm fairly certain I'm the cause of the problem, but I'm pretty new to
setting up raid and didn't really dive too far into the guts to find the
problem. I just finished deploying 8.04 beta to another machine with the
intent of moving all the bits from machine a (the one with the raid) to
machine b, nuke machine a and deploy 8.04, create the raid (hopefully
correctly this time), test the size stuff, and then move the vmware bits
from machine b back to a. So, I'll have a playground box that'll be fully
reloadable for the duration of this raid and vmware-vs-kvm comparison.

If others are interested in this topic, either as the topic for an irc
meeting or two, or for some more hands-on and/or group experimentation, I'm
willing to share the meager resources of this little box if it'll serve for
illustration or something along those lines.

- Mark

On Tue, Apr 15, 2008 at 10:25 PM, Jim Rorie <jimrorie at logisys.biz> wrote:

> Nope, you're right on target for this list.
> I think there is a lot of interest in this subject.  I am looking to set
> up an Ubuntu host with a Windows MCE guest to aid my migration from MCE
> to Ubuntu.  I also would like to run a XP guest on my laptop for those
> apps that Wine is choking on (My harmony remote, for one). I will be
> diving in once Hardy is out.
> Is your sata-raid software only?  I have some experience with the nvidia
> hardware raids if that might help.
> Jim
> On Tue, 2008-04-15 at 21:44 -0400, Mark Kempster wrote:
> >
> I'm new to the irc meetup thing, so apologies if this is way out in the
> weeds.
> I'm interested in virtualization. I really ran into trouble with running
> vmware-server and getting knocked around a bit when ubuntu had kernel
> updates. It sure was a rude awakening to have my vmware collection of
> servers all go belly up after what had previously (in a
> pre-vmware-server) been a pretty innocent change. Yeah, kernel upgrades
> can be scary, but it was a pretty rocky couple months with ubuntu and
> vmware there for awhile. I hope kvm is better.
> With the shipping of kvm in Hardy, I'm really interested in using ubuntu
> as the host o/s, ubuntu JeOS as the guests with kvm as the
> virtualization stack. Problem is, I really don't know jack about kvm.
> Along those lines, I'm interested in storing these multiple kvm guests
> on a raid 1 or something. I attempted something similar in Gutsy and
> kinda blew it. A lesson in sata-raid1-setup would do me wonders.
> So, with the maturing of Ubuntu in general (just installed the beta
> today) and specifically the inclusion of kvm, I'm interested if others
> have experience running ubuntu as both host and guest. If folks would be
> willing to share some of their practical knowledge, or if other folks
> who are interested but (like me) have only a little bit of experience
> have questions and are interested in a group foray into the experiment,
> I'd be interested in joining in.
> Thanks!
> - Mark
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