On Wed, 17 Jul 2002 @ 4:14pm (+0100), David Brownlee wrote:

DB> 	Of course there _had_ to be a typo in it :)
DB>
DB> 	Version II

I finally got around to pretty'ing this up:

http://digitalfreaks.org/~lavalamp/raid_l1_root_draft1.html

Thanks for the input, everyone.

-lava

DB>
DB> 	I ended up pushing the root partition an extra 64 sectors down
DB> 	the disk and using '-b 16' to installboot to install the second-stage
DB> 	boot loader contigously in the space.
DB>
DB> 	The following should work for anyone wanting to setup a RAID system.
DB> 	As a bonus it it _should_ be possible to use it to convert an existing
DB> 	system to mirrored without needing any console access, but do _not_
DB> 	just believe that, try with a test system first :)
DB>
DB> 	Assuming you want to mirror wd0 and wd1.
DB>
DB> 	- Install the system normally on wd0, without setting up RAID.
DB>
DB> 	- disklabel wd1, and ensure wd1a starts at least 100 blocks from
DB> 	  the start of the disk (a cylinder is a good unit), wd1c should
DB> 	  be identical to wd1d. You can raid the entire disk, or just part,
DB> 	  using the remainder for less critical storage, or even swap.
DB>
DB> 	- Create /etc/raid0.conf, note 'wd9a' should be a non existant disk
DB> 	    START array
DB> 	    1 2 0
DB>
DB> 	    START disks
DB> 	    /dev/wd1a
DB> 	    /dev/wd9a
DB>
DB> 	    START layout
DB> 	    128 1 1 1
DB>
DB> 	    START queue
DB> 	    fifo 100
DB>
DB> 	- Setup the raid
DB> 	  raidctl -C /etc/raid0.conf raid0
DB> 	  raidctl -i raid0		(Ignore error messages)
DB>
DB> 	- disklabel -i -I raid0
DB> 	  Create at least raid0a.
DB>
DB> 	- Copy installed system from / to /mnt. Dump, pax, or tar OK.
DB> 	  eg:
DB> 	  newfs raid0a
DB> 	  mount /dev/raid0a /mnt	(If separate /usr etc, newfs & mount).
DB> 	  eg: 'cd / ; pax -X -rw -pe / /mnt'
DB>
DB> 	- Edit /mnt/etc/fstab and update wd0 lines to raid0.
DB>
DB> 	- /usr/mdec/installboot -b 16 /usr/mdec/biosboot.sym /dev/rwd1d
DB>
DB> 	- 'raidctl -A root raid0', then reboot.	 The kernel should boot
DB> 	  from wd0, then automatically use raid0 as the root filesystem.
DB>
DB> 	- disklabel wd0 to match wd1.
DB>
DB> 	- raidctl -a /dev/wd0a raid0
DB>
DB> 	- raidctl -F component1 raid0
DB>
DB> 	- /usr/mdec/installboot -b 16 /usr/mdec/biosboot.sym /dev/rwd0d
DB>
DB>
DB> --
DB> 		David/absolute		-- www.netbsd.org: No hype required --
DB>
DB>