zfs raid and/or hardware raid..

Erik Trulsson ertr1013 at student.uu.se
Wed Feb 11 14:21:58 PST 2009

On Wed, Feb 11, 2009 at 10:18:42PM +0100, Wojciech Puchar wrote:
> > RAID implementations (and most of the cheaper add-on RAID cards.)  RAID that
> > is supported in the BIOS have one advantage over other software
> > implementations, and that is that you can boot from all supported RAID
> > configurations, which is not always the case otherwise.
> always - if you use software RAID (gmirror) properly.

gmirror handles only RAID-1 if I am not mistaken.
That is the exception where you can boot from a RAID array even the BIOS
does not know about it. (But I would worry about what would happen if you
were trying to boot from a degraded RAID-1 array.  What happens if the BIOS
tries to boot the wrong disk?)

For a RAID-0, RAID-5, or RAID-10 array on the other hand, I think it is not
possible to boot from them unless you have a BIOS which understands the
array format.

<Insert your favourite quote here.>
Erik Trulsson
ertr1013 at student.uu.se

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