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Hi I just wanna disable the default RAID in my server IBM System X3400 M2 Server(7837-24X),i have 3 disk drives SAS. I want to make them a JBOD "Just a Bunch Of Disks", because I want to install in the drive 0 CentOS, and the other two make them cache files for a squid server. I disable the RAID in the BIOS:

System Settings/Adapters and UEFI drivers/LSI Logic Fusion MPT SAS Driver

LSI Logic MPT Setup Utility

RAID Properties/Delete Array

Later I boot the CentOS live CD and install the OS in the drive 0, and the others 2 mounted like this:

*LVM Volume Groups
vg_proxyserver     139508
lv_root            51200    /    ext4
lv_home        84276    /home    ext4
lv_swap        4032
Hard Drive
free        140011
free        140011
sdd1        500    /boot    ext4
sdd2        139512 vg_proxyserver    physical volume(LVM)

But when I restart the server give me the error:

Boot failed Hard Disk 0
UEFI PXE PciRoot(0x0)/Pci(0x1,0X0)/Pci(0x0,0x0)/MAC(001A64B15130,0X0))
........PXE-E18:Server response timeout.
UEFI PXE PciRoot(0x0)/Pci(0x1,0X0)/Pci(0x0,0x0)/MAC(001A64B15132,0X0))
........PXE-E18:Server response timeout.

and the OS not start. The IBM force me to do a RAID?,why?

share|improve this question
Same question as… – Hennes Nov 16 '12 at 16:29
yes,it's the same – BanKtsu Nov 16 '12 at 16:33

Why not use a Raid 10 or 5? I am assuming that you have a 4 drive chassis. It's easy to make separate partition for Squid file to reside. Just do a custom partition setup in the Cent installer. Performance will be better and you will eliminate a single point of failure setup using single drives.

share|improve this answer
Well I have only 3 disk drive SAS, and my raid controller not support RAID 5 (Model Hot-swap con PCI-Express ServeRAID-BR10i for RAID-0, -1 and 1-E) – BanKtsu Nov 16 '12 at 16:54

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