Hi, On Sun, 21 Mar 2010, David Hubbard wrote:
> From: Behalf Of J. Epperson >> >> I'm somehow missing how getting the non-installable smaller >> GPT VD to be /dev/sda will change that scenario. The other >> responder echoed one of my initial thoughts when he suggested >> turning off the external array. That should do it. > > If I could get the internal raid controller to be > /dev/sda, then the RHEL/centos installer will not > care about the fact that the external array is > too big and would require GPT to boot off of, then > the installer would let me proceed. It was only > an issue with it being /dev/sda since that made the > installer think there was no way to writen an MBR > and boot off of it. > > But, unplugging external did lead me the right direcation. > What I've had to do is this: > > 1) Internal array I had desired to be single RAID 50 > across 8 drives. Thanks to Dell's choice of LSI > for their current raid controllers and LSI missing > the feature that most others seem to have in being > able to present parts of one array as multiple > logical drives, I ended up having to waste the first > two drives to make a RAID 1 mirror smaller than 2 TB > and then only six remaining drives in the RAID 50. > > 2) Unplugged the external array and installed centos > using normal non-GPT boot to the raid 1 virtual > drive. It installed to /dev/sda. > > 3) After install, edit /boot/grub/device.map and > changed it to show: > > (hd0) /dev/sdb > > Then: > > grub > grub> device (hd0) /dev/sda > device (hd0) /dev/sda > grub> root (hd0,0) > root (hd0,0) > Filesystem type is ext2fs, partition type 0x83 > grub> setup (hd0) > setup (hd0) > Checking if "/boot/grub/stage1" exists... no > Checking if "/grub/stage1" exists... yes > Checking if "/grub/stage2" exists... yes > Checking if "/grub/e2fs_stage1_5" exists... yes > Running "embed /grub/e2fs_stage1_5 (hd0)"... 15 sectors are embedded. > succeeded > Running "install /grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/grub/stage2 > /grub/grub.conf"... succeeded > Done. > > > 4) Reboot, connect external array while server is > rebooting, comes back up and boots off of internal > array from bios, grub is happy because now it is > set up for /dev/sdb. > > Only downside to this situation is if something were > to fail and take the external array down the server > won't boot since internal will go back to being > /dev/sda. But if the external array is down then > we've got issues anyway. :-) The real matter is the sequence of drivers within the initrd file. I can't tell about RH, but with SUSE you have /etc/sysconfig/kernel with a line like INITRD_MODULES="amd74xx megaraid_mbox processor thermal fan jbd ext3 \ edd aic7xxx qla2300 tg3" where you can change the sequence for your needs. After changing, the initrd file needs a rebuild. Viele Gruesse Eberhard Moenkeberg (emoe...@gwdg.de, e...@kki.org) -- Eberhard Moenkeberg Arbeitsgruppe IT-Infrastruktur E-Mail: emoe...@gwdg.de Tel.: +49 (0)551 201-1551 ------------------------------------------------------------------------- Gesellschaft fuer wissenschaftliche Datenverarbeitung mbH Goettingen (GWDG) Am Fassberg 11, 37077 Goettingen URL: http://www.gwdg.de E-Mail: g...@gwdg.de Tel.: +49 (0)551 201-1510 Fax: +49 (0)551 201-2150 Geschaeftsfuehrer: Prof. Dr. Bernhard Neumair Aufsichtsratsvorsitzender: Dipl.-Kfm. Markus Hoppe Sitz der Gesellschaft: Goettingen Registergericht: Goettingen Handelsregister-Nr. B 598 ------------------------------------------------------------------------- _______________________________________________ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
