Subject: RAIDframe for dom0?
To: None <firstname.lastname@example.org>
From: Greg Troxel <email@example.com>
Date: 08/10/2005 10:41:40
I would like to set up a machine with NetBSD/Xen and RAID-1 (on 2
identical disks). Ideally, I'd like to be able to boot off a RAID-1
root, with xen and netbsd-XEN0 both on that filesystem, with boot
blocks on the other disk that can boot off the second disk.
To be a bit more concrete, I envision an 8G /dev/raid0 with wd0a and
wd0b, on which I put / swap /var /usr as raid0[abef], and a large
(200G perhaps - whatever's left of a large disk) /dev/raid1 of wd0e
and wd1e, with raid1e mounted on /n0. I'll put domU disk files in
I know i386 boot can boot from RAID-1, but with Xen you have to use grub,
and it seems grub doesn't grok RAID-1:
So, with a small partition for /grub, can grub's ffs_stage1_5 (?) and
stage2 read from RAID-1?
Can I have a /grub0 and /grub1 on each disk, and install grub on both
disks and get the 'system can boot if either disk is working' feature
Any hints on how to install such a system would be appreciated,
although i suppose aside from making a partition for grub it's a plain
i386 question before one installs grub and boots xen+XEN0 rather than