[OmniOS-discuss] LTS r151014 installation issue from USB stick

[Michael Mounteney]

On Sat, 13 Aug 2016 12:59:52 +0200
Krzysztof Grzempa <grzempek at gmail.com> wrote:

> Correct me if I'm wrong..There is no way to setup raidz on rpool.
> Right ?

In the simple case, that's so because when you first boot the computer,
the BIOS or boot firmware (of whatever type) has to read boot data of
some sort; either a boot loader (GRUB/LILO on x86, LILO on others) or
the kernel itself directly.

On a raidz system, the data are spread across all disks and don't exist
in entirety on any one disk.  So unless the firmware can read from
multiple disks and re-assemble the boot loader or kernel, it can't boot
the OS.  Since raidz can be in a variety of configurations, it would be
very hard to give the firmware the necessary information.

That doesn't apply to hardware RAID of course, since that is seen by
the firmware as one device.  I've seen recommendations against hardware
RAID, on this list.

______________
Michael Mounteney