Boot from Raid

[leavitt@webcom.com]

> 
> 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.

(actually, you can do this with two disks, by creating multiple
"metadbs" on each disk... I found this out, after I'd installed
the system, by reading the docs. more carefully)

> 
> 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 the out of date vfstab?

See other post in response to Doug Hughes.
> 
> 
> 


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