Boot from Raid

[Michael Helm]

leavitt@webcom.com writes:
> > 2.51. We would like to boot the 4000 from the raid and mirror the root =
> > volume. Is there any danger to booting booting from the array? Is there =

> The recommended method of disaster recovered is "high-availability"...
> dd your root disk to an equivalent internal disk on a nightly basis.

We set up some of our machines to boot from mirrored disks when
we got our arrays and put SDS (mistake!) on them.  We also put the
same kind of arrangement on some of the desktops (biggest single
POF - spindles on individual disks, engineer downtown very costly
to us) but abandoned the idea because of the need for quorums (quora?)
on SDS mirrored boot disks.  You really need 3 disks, which is just
too inconvenient for the desktops, altho it works in the arrays.

We haven't really gotten back to doing anything similar with Veritas.

TL is certainly right about the complexity added, at least for SDS.

I'm not sure that this "dd" method would work at all, tho.  How could
it be made automatic?  Isn't the bootup going to be whacked  by
the out of date vfstab?