Summary: Mirroring root disk and /var/mail using SDS

Thanks to:

"Paveza, Gary" <gary.paveza@AIG.COM>
"Paul Kraus" <paul@kraus-haus.org>
jim.musso@phoenix.gov
Roger Kynaston <kynaston@gmail.com>

Summary:
1) One one set of metadatabases is enough, suggested to create 3 metadb replicas on each OS disk and 1 on each data
disk, but make sure that loss of one any controller or disk does not take out more than 50% of the replicas.;
2) Make sure only doing a way mirror as there is data on /var/mail, perform metaattach afterwards;
3) Do forget to update /etc/vfstab

Regards
Alan



Alan Kong wrote:
> Hi,
> I have 2 internal disk and "/var/mail" is hung off from external disk. 
> I intended to use SDS to mirror the system disk with the 2 internal 
> disks and add a second disk to mirror the external disk on 
> "/var/mail". Wonder the following method is  correct:
>
> Platform: Solaris 2.8
> SDS: version 4.2.1
>
> For system disk:
> 1) metadb -a -f -c2   to create the metadb on the 2 internal disks for 
> the root fs;
> 2) create the meta devices on the 2 internal disk.
> 3) create the mirror  for the root fs.
>
> For "/var/mail" partition:
> 4) metadb -a -f -c2 to create metadb on the 2 external disks for the 
> "/var/mail" partition;
> 5) create the meta devices on the 2 external disks;
> 6) create mirror for "var/mail".
>
>
>
> Thank you.
>
> Regards
> Alan
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