how to fresh raidframe install on an already raidframe system?

[Kent Watsen]

Hi,

I have a Netra T1 (sparc64) running 3.9 with raidframe on root.  Being 
such an old system, I decided to do a fresh install, so I boot the 4.6 
cdrom and install the system on the first disk (sd0).  Rebooting again 
brings the 4.6 up fine so I compile and install a new raidframe-enabled 
kernel.  Rebooting again produces many core dumps - `uname -a` says 4.6, 
but the filesystem is from the old 3.9 raid - the new raidframe kernel 
must have found the raid set on the 2nd disk.  Physically ejecting the 
second disk (sd1) and rebooting gives a clean boot, but now, of course, 
I don't have the second disk to install the raid set on...

What do other people do?  - rewrite the disklabel on the second disk so 
raidframe won't try to use the 2nd disk? - put a new/temporary 
/etc/raid0.conf file to configure raidframe to ignore the 2nd disk?  Is 
it even possible to compile/install 4.6 on top of a raidframe set 
avoiding the need to reconfigure it at all?

PS: I looked into softraid for a while, as its recommended in FAQ 14, 
before realizing that it didn't support raid on the root disk.  This was 
especially confusing as its man page lists "softraid0 at root" while not 
specifically saying that it doesn't support raiding the /root disk.  
Maybe the FAQ and man page could be more clear on these points?


Thanks,
Kent