how to setup linux software raid 10

[Krsnendu dasa]

On 05/09/07, Denis Melnikov <dmelnik at regent.ru> wrote:
>
> > I managed to get RAID working partially. It took me a while
> > to figure out how to do it.
> > RAID doesn't come up as an option on the initial screen, so I
> > thought I would document what I did for others who wonder how
> > to access the RAID function from the installer.
> >
> > 1. I got to the partition stage of the installation (on the
> > standard install).
> > 2. For each of my 4 disks I created a partition.
> > 3. I selected each parttion one by one and set it as physical
> > partition for RAID.
> > Once the disks are assigned as RAID, the setup RAID option
> > appears on the main screen.
> > 4. Select Setup RAID,
> > 5. Assign RAID 1 to the first two drives, with on spare.
> > 6. Do the same for the next pair of drives.
> > At this point it is possible to set up LVM. But I want to do
> > RAID 0 on the 2 RAID 1 devices.
> > It doesn't seem possible to do this from the installation
> > partition manager.
> >
> > How can I take my pairs of RAID1s and make them into RAID10?
> > Can I continue the installation setting up LVM one of the
> > RAID1s then once the system is setup run mdadm to make a
> > raid0 out of the two raid pairs?
>
> Yes. You can make up a volume of several partitions including
> RAID ones.
>
> Make sure you have /boot on a separate RAID1 partition,
> because GRUB cannot load from LVM prepared one.


OK. So I should make 2 partitions on each disk. One small one for /boot
which can be RAID1 with 2 spares.
The other partition would be as previously described. 2 Raid1 pairs striped
into one RAID10 Drive.


> Or is there a better way?
>
> Can you make a RAID partition for RAID0 over previously
> prepared RAID1 partition? Unfortunately, I cannot try it now.
>
> Denis
>
>
> > I was thinking of setting up one 320GB RAID10 drive with one
> > LV and using the guided partitioning within the LV. Would
> > that be a reasonable approach?

Actually it would be a 640GB drive because RAID 0 usage space on both disks.


>
> > Thanks,
> > Krsnendu dasa
> >
> >
> > On 26/08/07, Scott Balneaves <sbalneav at legalaid.mb.ca> wrote:
> > On Sat, Aug 25, 2007 at 12:35:38PM -0700, Joe Rowe wrote:
> > >
> > > Like myself,
> > > More and more people are using Edubuntu or Ubuntu
> > > servers or critical workstations with inadequate plans for
> > Disk failure.
> > >
> > >
> > > Anyone,
> > > Please reply if you have done software RAID on Ubuntu/Edubuntu
> > > and you are good at documenting steps by step tips.
> >
> > I've done software raid for years and years.  It's pretty
> > easy, and just
> > required doing a bit of reading and understanding.  The
> > O'Reilly "Managing Raid
> > on Linux" is an excellent book on the subject.
> >
> > Scott
> >
> > --
> > Scott L. Balneaves | "Eternity is a very long time,
> > Systems Department |  especially towards the end."
> > Legal Aid Manitoba |    -- Woody Allen
>
>
> --
> edubuntu-users mailing list
> edubuntu-users at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://lists.ubuntu.com/archives/edubuntu-users/attachments/20070906/b393b6da/attachment-0001.htm