Mirroring the root disks when using Jumpstart...

[Adam B]

[Akop Pogosian]

It seems like this is one of the most requested features. I hope Sun
has this on the list of things to do for Solaris 10..

--
Akop Pogosian

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[Chris Mattern]

Akop Pogosian wrote:

> It seems like this is one of the most requested features. I hope Sun
> has this on the list of things to do for Solaris 10..
>

Gee, can't you just run "mirrorvg rootvg"? Oh, right, that's only AIX. :-)

Chris Mattern

[Phil Meyer]

Adam B wrote:

>

You don't want to mirror root disks during jumpstart, trust me. I have done
it literally hundreds of times with SDS; its no big deal. But I don't do
that any more, nor do I recommend it. Veritas cannot easily be automated
at the initialization, so it cannot readily be done from jumpstart, but
that is all besides the point.

Use jumpstart in combination with flash archives and hardware based raid for
best results. Use these tools to design production systems that are fully
Field Replacable Units, with all applications and data on 'safe' storage
like hardware based raid. No storage is perfectly safe, but hardware based
raid is the best we have currently, so use it. And generally speaking,
adding hardware based raid to external storage options does not add much to
the cost.

Use all your internal drives for less critical data that can be covered by
your usual routine backups. Or simply don't buy internal drives at all.

[Paul Coray]

Phil Meyer wrote:

> Adam B wrote:
>
>
> You don't want to mirror root disks during jumpstart, trust me. I have done
> it literally hundreds of times with SDS; its no big deal. But I don't do
> that any more, nor do I recommend it. Veritas cannot easily be automated
> at the initialization, so it cannot readily be done from jumpstart, but
> that is all besides the point.
>
> Use jumpstart in combination with flash archives and hardware based raid for
> best results. Use these tools to design production systems that are fully
> Field Replacable Units, with all applications and data on 'safe' storage
> like hardware based raid. No storage is perfectly safe, but hardware based
> raid is the best we have currently, so use it. And generally speaking,
> adding hardware based raid to external storage options does not add much to
> the cost.
>
> Use all your internal drives for less critical data that can be covered by
> your usual routine backups. Or simply don't buy internal drives at all.
>

Speaking of flash archives: I just took snapshots with flar create of
two Solaris 9 servers, which have their root disks mirorred with
SDS/LVM. How will those systems behave mirror-wise when doing just a
plain jumpstart restore off these images? Will they even boot? What
files do I have to adjust to reenable the mirror? (/etc/vfstab
/etc/system /etc/lvm/* ?).

Rgds

Paul

[cliff]

"Adam B" <adam.beresford@uk.***NOSPAM***thalesgroup.com> wrote in message news:<bg7vfa$igh$1@rdel.co.uk>...

We use LiveUpgrade to 'mirror' our disks. LiveUpgrade is a set of
scripts from Sun which clones your boot environment. It depends upon
whether you want synchronized mirroring or merely a backup, or clone
of your root volume. Every week we run lucopy to make a backup of our
root environment. The great thing about it is we can upgrade the OS on
the backup drive while the other OS is up and running.

[Darren Dunham]

Paul Coray <paul.coray@spamblock.unibas.ch> wrote:

> Phil Meyer wrote:
> Speaking of flash archives: I just took snapshots with flar create of
> two Solaris 9 servers, which have their root disks mirorred with
> SDS/LVM. How will those systems behave mirror-wise when doing just a
> plain jumpstart restore off these images? Will they even boot?

My understanding is that they will not.

> What
> files do I have to adjust to reenable the mirror? (/etc/vfstab
> /etc/system /etc/lvm/* ?).

You can't set up mirroring by adjusting files. Mirroring assumes that
there is a valid state replica database on the disks themselves. You
have to create that by running specific commands. It would be possible
to do that in a finish script of some sort.

You can *disable* the need for the mirror by commenting out or removing
the 'rootdev' line in /etc/system, and by modifying /etc/vfstab to mount
the filesystems from the disk slices rather than the logical volumes or
metadevices.

--
Darren Dunham [email]ddunham@taos.com[/email]
Unix System Administrator Taos - The SysAdmin Company
Got some Dr Pepper? San Francisco, CA bay area
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