-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Joshua Baker-LePain Sent: Wednesday, July 12, 2006 2:08 PM To: CentOS mailing list Subject: RE: [CentOS] Speaking of 3Ware/RAID/SATA/9550SX...
On Wed, 12 Jul 2006 at 11:00am, Mark Schoonover wrote
Joshua Baker-LePain wrote:
How is your array setup? You can *not* boot from a device
4TiB. On
such a device, you must use a gpt disklabel and neither
grub nor LILO
support such.
My array size is 4.5TB. It's just one large single RAID5,
so it's slightly
less than 4.5TB. So, what you're saying then is to either
put a small single
HD to install CentOS, or make the array smaller than 4.5TB.
SNIP
Ladies and Gentlemen,
Using the 3ware 9550 or 9500 series controllers for any array larger than 2 TB requires that you set up the controller to use "Auto-Carving", set up and build the kernel to enable multiple LUNs, rebuild initrd, reboot, and fdisk / mkfs the unused areas.
This forces the controller to "Auto-Carve" multiple 2 TB devices on different LUNS of the same SCSI ID. You also need to enable multiple LUN support in the kernel when you build a new kernel - which is required.
So .... the install will go like this:
1) Enable Auto-carving in the 3ware BIOS. 1A) Build 3ware boot driver floppy / CDROM for install
2) Install Centos with: 100 to 200 MB for /boot, 2 to 4 GB for swap, 50 to 100 GB for / - leave rest of array empty. Do rest of install as normal.
3) Install kernel source rpm and rebuild kernel from existing .config file BUT turn on multiple LUN function in the SCSI functions of the kernel.
Rebuild kernel and initrd files and test. Reboot with new kernel.
4) fdisk and mkfs the rest of sda
5) fdisk and mkfs sdb (second LUN of first device - which you will now be able to see)
6) If you want to span the devices use LVM or md or whatever.
We have done this and getting a system to this point took some time.
Once we had the magic formula it went smoothly.
Hope this helps...........
Seth Bardash
Integrated Solutions and Systems 1510 Old North Gate Road Colorado Springs, CO 80921
719-495-5866 719-495-5870 Fax 719-337-4779 Cell
http://www.integratedsolutions.org
Failure can not cope with knowledge and perseverance!