Subject: Re: Upgrading OS for an environment using Raid
To: Daniel Carosone <>
From: David Laight <>
List: current-users
Date: 01/04/2004 23:06:47
> For the special case of RAID1 sets and install media, adding the
> ability to find and read this label might be quite
> beneficial. Thoughts?

This is similar to the problem of installing the system in the first place.
Someone wrote some long, error prone, instructions and posted a URL....

It ought to be possible to (on i386 at least) to initially install
with a 64 sector gap [1] before the netbsd partition, then fiddle the
disk layout so that became the raid header (hand waves all the raid

Upgrading could be done by breaking the mirror and then making the
original install area bootable again.
(With a few tweaks the raid set and raw disk could be selected by the
mbr-bootsel code - but you probably wouldn't want to make that easy!


[1] Greg might be persuaded to make the 64 a parameter of the raid header,
a track multiple might be a better value - and needed on some systems.

David Laight: