RAID-10 on PE2850

[Lutz Birkhahn]

David Hubbard wrote:
> Hit the space twice to select drives 0 and 1, hit enter
> to end (just once), hit space twice to select drives 2
> and 3, hit enter.  Then I believe it's F10 to set up the
> logical drive

Hey, that was easy! Thanks a lot for saving my sanity! ;-)

> and you'll set it as raid one and it should
> indicate that it has two stripes or something along those
> lines.

Yep, once I had used the "space space enter space space enter" cheat
code and pressed F10 ("Select Configurable Arrays"), I got two arrays
offered. I selected both arrays and pressed F10 again, and now the
read-only field showed "Span = YES". RAID-1 was the only option left,
so I used that, and I ended up with one single large logical drive,
/dev/sda with the right size (146G out of 4 x 73G drives).

Thanks again for saving the day,

/lutz



> > -----Original Message-----
> > From: linux-poweredge-bounces at dell.com
> > [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Lutz Birkhahn
> > Sent: Wednesday, May 03, 2006 11:19 PM
> > To: linux-poweredge at dell.com
> > Subject: RAID-10 on PE2850
> >
> > Before I start banging my head against the wall... Does anybody have a
> > tip how to configure 4 drives on a PE2850 for RAID-10 or 1+0
> > or something
> > like that?
> >
> > I spent the most part of today playing with the RAID BIOS program and
> > reading tons of emails saying that others do it every day, but I still
> > can't figure it out how to do it (I've configured many of
> > these machines
> > with RAID-1 or RAID-5 before, that works fine). From what I
> > read on the
> > list it seems you need to start with 2 RAID-1 arrays and then somehow
> > put them into the same Span (i.e. striping them)?
> >
> > I tried all kinds of variations, like selecting all 4 of the
> > drives and
> > build an array out of those (only offers RAID-0 or RAID-5)...
> >
> > Do you need a split backplane for RAID-10?? (we've ordered all of our
> > machines with the 1x6 HD Backplane)
> >
> > These are the steps I've done so far:
> >
> > BIOS, hit ^M to enter RAID settings
> > - Configure -> New Configuration (all 4 drives show up on Channel 0)
> > - Select (with Space key) the first 2 drives (A00-00 and A00-01)
> > - hit Enter twice, shows the box "Select Configurable Arrays", only
> >   option I can select is A00: Span-1 (I tried not selecting it, but
> >   then I cannot continue; also didn't find any way to change this
> >   string).
> > - F10 (Configure), it shows:
> >
> >    LD  RAID   Size    #Stripes   StpSz   Drive-State
> >     0   1    69880MB      2      64KB    OPTIMAL
> >
> > - The RAID type field only offers RAID-0 or RAID-1 (no RAID-10 or so)
> >   so I keep it at RAID-1
> > - There is a line "Span = NO", but I cannot change it (when I
> > hit Enter
> >   it says "Not An Option Item. Press Any Key To Continue")
> > - So I hit Enter on the "Accept" field and have 1 RAID-1 array:
> >
> >    RAID Ch-0                     RAID Ch-1
> >    ------------------------------------------------
> >    0: ONLIN A00-00
> >    1: ONLIN A00-01
> >    2: READY
> >    3: READY
> >
> > How do I proceed from here, or is this already wrong??
> >
> > I tried adding a 2nd RAID-1 array just like the first one, called A01,
> > but at the "Select Configurable Array" it again only had one option,
> > "A01: Span-1", and I ended up seeing 2 disks in Linux (sda and sdb),
> > which is not what I want...
> >
> > In case it matters, the System BIOS is A02, Version H430 (Feb
> > 25, 2005),
> > FW 521S.
> >
> > Chris Purcell wrote a while ago:
> > > from the Main Menu:
> > > Select Configure,
> > > Select View/Add,
> > > Arrow down to your drive(s),
> > > Select them using the spacebar,
> > > When drive selection is finished, press Enter,
> > > Now hit F-10,
> > > If you aren't creating a Raid10, Raid50, etc, just a normal raid0,
> > > raid1, or raid5, hit spacebar, then F-10 again,
> >
> > OK, but what *if* I do want to create a Raid10, Raid50, etc.??!
> >
> > TIA for any help or consolation...
> >
> > /lutz
> >
> > _______________________________________________
> > Linux-PowerEdge mailing list
> > Linux-PowerEdge at dell.com
> > http://lists.us.dell.com/mailman/listinfo/linux-poweredge
> > Please read the FAQ at http://lists.us.dell.com/faq