[lug] setting up hardware (or software) raid on dells

Bear Giles bgiles at coyotesong.com
Sun May 1 18:48:35 MDT 2011

Okay, I got the alternative install image and built a system thusly:

/dev/sd(a,b)1: ext3 over RAID
/dev/sd(a,b)3: LVM over encryption over RAID

It installs cleanly but when I try to boot the system it craps out since it
can't find the root partition. I'm never asked for the encryption password.

Ideas?  I've googled some and gotten some advice on what to do at the
initramfs prompt but so far no luck.

On Sat, Apr 30, 2011 at 12:50 PM, Simos Hadjiyiannis <
blug at chinesetearoom.com> wrote:

> On Saturday 30 April 2011 12:27:01 pm Bear Giles wrote:
> > I'm trying to install Ubuntu 11.04 onto a new system and have run into a
> > small problem. The MB supports RAID but I can't get it working. It says
> > something about 'unsigned drives' so maybe you have to prepare the disks
> > first?
> >
> > Lacking that how would I set up software RAID? I hope it's not a case
> where
> > the installer would only do it if you use the fully automatic install
> > instead of setting up your own partitions.
> >
> > This is an Optiplex 960 with two SATA hybrid drives (4GB SSD + 500GB
> > conventional).  Nothing has really come up in google yet but that's
> probably
> > mostly my poor google skills.
> Bear,
> Having gone through it before, I would *never* again use on-board RAID
> (i.e.
> RAID built into the motherboard). A separate dedicated RAID card is
> probably
> overkill for a desktop system, but Linux software raid is much easier to
> setup and maintain long-term in any case.
> If you just want to do software raid (md devices) see here:
> https://help.ubuntu.com/community/Installation/SoftwareRAID
> You'll have to use the Alternate Install Disk but it's not that complex.
> On my Debian system I run a mix of MD & LVM, which can be more flexible,
> but it gets a bit complex to setup.
> Regards,
> Simos
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