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Old 11-28-2006, 08:41 PM   #1
madking75
LQ Newbie
 
Registered: Nov 2006
Location: Germany - Franken - Nuremberg
Distribution: Slackware 11
Posts: 28

Rep: Reputation: 15
How to do a Raid-0 Installation with one boot :-)


How to do a Raid-0 Installation with one boot :-)


Hi, I read several How-To and everybody told you have to install at first linux and then you can create a raid-1.

But I want a raid-0 without installing linux first on a single disk. And YES I know a Raid-0 with 3 disks is not the best choice, but I have a good data backup system.

My system:

3 * Sata-150 Harddisks 80GB
Asus A8N-Sli Motherboard with nforce4 Chipset


Ok, here is my How-To:

Warning! You will lost ALL YOUR DATA on your Harddrive !!!

1. Deactivate nvidia Raid in Bios

2. Boot with Slackware 11 DVD

3. Start fdisk (not cfdisk)

Code:
	-fdisk /dev/sda
	-o (New Dos Partition Table)
	-w
	Do the same with /dev/sdb and /dev/sdc
4. Start cfdisk
Create on each Harddisk exact the same partitions
Code:
	PartNr. Size     Flag    Type (later)Mount (later)
	1       2000     Boot    Ext2        /boot
	2       2000     Swap				
	3      14000     Linuxraidautodetect reiserfs /
	4      62026.84  Linuxraidautodetect reiserfs /home
5. Create a file called /etc/raidtab with the following entries:

Code:
	raiddev	/dev/md0
			raid-level		0
			nr-raid-disks	3
			chunk-size		4
			persistent-superblock	1
			device	/dev/sda3
			raid-disk	0
			device	/dev/sdb3
			raid-disk	1
			device	/dev/sdc3
			raid-disk	2
			
	raiddev	/dev/md1
			raid-level		0
			nr-raid-disks	3
			chunk-size		4
			persistent-superblock	1
			device	/dev/sda4
			raid-disk	0
			device	/dev/sdb4
			raid-disk	1
			device	/dev/sdc4
			raid-disk	2
6. Execute these 3 commands:

Code:
	-mkraid /dev/md0
	-mkraid /dev/md1
	-raidstart --all
7. Finished! Start the Setup :-)

8. Maybe you should save the /etc/raidtab on floppy, so you don't have to enter it by hand again if something goes wrong. Because I'm not really a crack. I installed Linux 25 times until I got this way. I'm a try and error guy....

9. Lilo installation:

Use the expert mode! Maybe you have to edit it by hand /mnt/etc/lilo.conf and install it with lilo -r /mnt


This Lilo configuration is not the original I'm using at setup, but it's nearly the same:

Code:
# LILO configuration file
# generated by 'liloconfig'
#
# Start LILO global section
boot = /dev/sda
append="hda=ide-scsi hdc=ide-scsi" #Need for vmware player
#compact        # faster, but won't work on all systems.
prompt
timeout = 30
# VESA framebuffer console @ 1024x768x64k
vga = 791
# Normal VGA console
# vga = normal
# VESA framebuffer console @ 1024x768x64k
# vga=791
# VESA framebuffer console @ 1024x768x32k
# vga=790
# VESA framebuffer console @ 1024x768x256
# vga=773
# VESA framebuffer console @ 800x600x64k
# vga=788
# VESA framebuffer console @ 800x600x32k
# vga=787
# VESA framebuffer console @ 800x600x256
# vga=771
# VESA framebuffer console @ 640x480x64k
# vga=785
# VESA framebuffer console @ 640x480x32k
# vga=784
# VESA framebuffer console @ 640x480x256
# vga=769
# ramdisk = 0     # paranoia setting
# End LILO global section
# Linux bootable partition config begins
image = /boot/vmlinuz
  initrd = /boot/initrd.gz #Added after kernel upgrade
  root = /dev/md0
  label = Linux
  read-only # Non-UMSDOS filesystems should be mounted read-only for checking
# Linux bootable partition config ends
10. Here is the fstab, notice the pri=1 on the swap drives.


Code:
/dev/sda2        swap             swap        defaults,pri=1   0   0
/dev/sdb2        swap             swap        defaults,pri=1   0   0
/dev/sdc2        swap             swap        defaults,pri=1   0   0
/dev/md0         /                reiserfs    defaults         1   1
/dev/sda1        /boot            ext2        defaults         1   2
/dev/md1         /home            reiserfs    defaults         1   2
/dev/cdrom       /mnt/cdrom       auto        noauto,user,ro   0   0
/dev/fd0         /mnt/floppy      auto        noauto,user      0   0
devpts           /dev/pts         devpts      gid=5,mode=620   0   0
proc             /proc            proc        defaults         0   0

Last edited by madking75; 11-29-2006 at 02:49 AM.
 
Old 12-29-2006, 04:35 AM   #2
dombrowsky
Member
 
Registered: Dec 2005
Location: New York
Distribution: Debian/GNU
Posts: 235

Rep: Reputation: 31
amazing. impressive. thanks!
 
  


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