SUMMARY: SDS booting from mirrored disk

From: Marco Greene (
Date: Tue Apr 04 2000 - 14:10:57 CDT

Thanks to
Arthur Darren Dunham
Gary Jenson
David Robillard
Vinnie German
Matthew Stier
Peter Keating
Colin Melville
...someone claiming to be "Lusty Wench"
and especially Paul Teasdel who pointed out the small item that I had

I forgot to put the boot block on the secondary boot device.

Also, some of you noted that I shouldn't use /dev/alias....I meant to type
devalias but I submitted the e-mail after a long day at work so I had a few

Paul's e-mail is below as it is the most complete solution:

Make sure you have a device alias for the two disks and then set the
boot-device to try the pair of them:

(from the ok prompt) devalias pri_disk /sbus@2,0/QLGC,isp@1,10000/sd@8,0 devalias sec_disk /sbus@a,0/QLGC,isp@1,10000/sd@0,0 setenv boot-device pri_disk sec_disk

Then ensure you have a valid bootblock on both disks:

(as root from OS) installboot /usr/platform/`uname -m`/lib/fs/ufs/bootblock /dev/rdsk/c0t0d0s0 installboot /usr/platform/`uname -m`/lib/fs/ufs/bootblock /dev/rdsk/c2t0d0s0



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