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hi,

On Tue, May 17, 2005 at 11:10:52AM -0600, Greg Oster wrote:
> rudolf writes:
> > according to 'man 8 raidctl',
> >=20
> > ``Multi-layered RAID devices (such as a RAID 0 set made up of RAID 1
> > sets) are not supported as root devices or auto-configurable devices
> > at this point.''
> >=20
> > May the patch to init discussed in following thread help with
> > current situation?
> >
> > http://mail-index.netbsd.org/tech-userlevel/2005/05/15/0000.html

short answer, yes.

long answer, yes, you will need to create a ramdisk containing all the
necessary files to configure your RAID sets and mount the file system.
then embed this md(4) image to your boot kernel and put it on a file
system on a device accessible by normal bootblocks (either ffs, msdos or
cd9660).

> No...  the autoconfiguration bits happen in the kernel long before=20
> init is run.  Allowing multi-layered RAID stuff for root would likely=20
> require teaching the bootblocks about RAID 0 sets, and that's quite a=20
> bit harder than supporting RAID 1 sets.  (Autoconfiguration of=20
> multi-layer RAID sets could be done with a little work, but there=20
> hasn't bene a whole lot of demand for it...)

that's why the chrooting init(8) could be used to boot from an initial
md(4) within the kernel, do all steps necessary to mount RAID 0 file
system and then continue multiuser within chroot in this file system.

the same trick as i use to have root fs on cgd(4).


regards,

--=20
-- Lubomir Sedlacik <salo@{NetBSD,Xtrmntr,silcnet}.org>   --

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