Re: [SLE] please!! help me, completly lost!

From: Louis Richards (louis_at_ldrinteractive.com)
Date: 05/05/04

  • Next message: Daniel Thivierge: "[SLE] Problem with SLES 8 with Compaq DL360" 
    Date: Wed, 05 May 2004 09:45:44 -0400
To: suse-linux-e@suse.com

    (Ted Harding) wrote:

    > <SNIP>
    >
    >I recall, some years ago, installing SuSE (?7.1/2) on someone's
    >machine which was equipped with hard drives configured as RAID..
    >
    >As I recall, there was an issue about booting from a RAID setup.
    >Basically, you needed either to have the boot stuff on a non-RAID
    >drive, or else to boot from a floppy. If the boot files were on
    >the RAID array then it would not work.
    >
    >I don't know if things have changed since then, and I certainly
    >don't claim any reliable knowledge of RAID setups.
    >
    >So if any of you thinks this may have something to do with Joao's
    >problems, and knows about RAID and booting, then please spell out
    >for him how to proceed!
    >
    >Ted.
    >
    >
    >
    You can boot from RAID level 1 (mirror) with no problems. When
    installing 9.0 the boot loader was automaticaly changed from grub to
    lilo when I set up a mirrored system. This is due to a bug in grub. If I
    changed the boot loader back to grub, the system would not boot (I had
    the same problems with my Fedora box wich did not automaticaly switch
    boot loaders). In any case, the system will boot if lilo is used.
    However, only the first drive has the loader on the MBR.

    Once booted you can switch to grub and setup the MBR on both drives. You
    can even edit menu.1st to include an entry to boot the mirror. This may
    be needed depending on how you bios handles a primary drive failure.

    # grub
    grub> device (hd0) /dev/hdb
    grub> root (hd0,0)
    grub> setup (hd0)
    Grub> quit

    The above assumes that the /boot partition is the first partition and
    would load grub on the second drive.

    This can also be done by booting in rescue mode and mount and chroot
    your system.

    Check out:

    http://www.doorbot.com/guides/linux/x86/grubraid/ 

    -- 
Louis D. Richards
LDR Interactive Technologies
  • Next message: Daniel Thivierge: "[SLE] Problem with SLES 8 with Compaq DL360"

    Relevant Pages

    • Re: Problem booting OS on IDE PCI adaptor card with Grub in MBR of hda
      ... I can see what it says about the card, as I'd used the supplied boot ... either have to put up with using the floppy for FC1, ... Well, with the BIOS showing all 3 hard drives, I wonder if the error ... message you are getting is actually from the Grub install on hde ...
      (Fedora)
    • Re: Problems with software RAID on SATA
      ... Connected to this are two 320GB drives ... >>which I want to turn into a RAID1 array. ... >>I'm almost certain it's a problem with initting the RAID arrays at boot. ...
      (Debian-User)
    • Re: Paul and Old Man: Cannot fix RAID5 failure ...
      ... I removed the drive reported in error, no boot or rebuild. ... I tried Universal Boot Disc but it won't load the RAID driver ... I was considering a parallel WinXP installation on a 4th disk, ... Maybe like in my case, actually 2 drives failed, while the RAID bios ROM ...
      (alt.comp.periphs.mainboard.asus)
    • Re: Problem booting OS on IDE PCI adaptor card with Grub in MBR of hda
      ... trying to boot FC1. ... to do, and just use hde, which is on the IDE PCI adaptor card for backups ... Well, with the BIOS showing all 3 hard drives, I wonder if the error ... message you are getting is actually from the Grub install on hde ...
      (Fedora)
    • grub Error 23 Selected Disk Does Not Exist - but it does!
      ... These drives contain Windows XP Pro and I ... am trying to set-up a dual boot system. ... and on the Slave while Fedora is on a 40 Gig partition. ... word GRUB and a flashing cursor. ...
      (Fedora)