Howard/Trantham Veritas Root Mirror question

From: Colin Bigam (colin.bigam@west.gecems.com)
Date: Mon Jun 16 2003 - 17:57:41 EDT


Hi Folks;

This is something that SHOULD be in the documentation, but I can't
find a clear answer anywhere and I need an answer ASAP.

We have an E420 which is going to be attached to a large amount of
fibre-attached disk, managed through VxVM, split into several DGs.
These DGs' names have been predefined.

Now comes the problem.

1) We need to use the two (only!) internal disks for the root
filesystem (plus swap) and a mirror. We also need a rootdg, since
none of the actual data groups are in rootdg
2) We can either put rootdg on individual slices (unsupported),
encapsulate the root disk and mirror (undesirable, since the disks
are different), or go through the Sun blueprint for a Veritas
root volume system.

This last option seems the best. For those who aren't familiar with
it (read the article here:
http://www.sun.com/blueprints/0800/vxvmref.pdf), it goes like this:

- encapsulate the root disk
- mirror it to the mirror disk
- unencapsulate the root disk
- mirror back from the mirror disk to the root disk
- Do some dark magic with the vxmksdpart to map the underlying
  disk partitions.

The question is this: CAN I BOOT DIRECTLY OFF OF EITHER OF THE DISKS?
Can I use these perfectly normal Veritas init'd disks as regular
boot devices, especially in the case of one of them failing?

Furthermore (just to add value to the post :-), is there a way to
make a bootable Solaris CD which has Veritas support?

Thanks,
Colin

--
| Colin Bigam, Senior Unix analyst
| GE IT Solutions
| colin.bigam@ge.com; (403)699-4584
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