[Veritas-vx] Adding a third mirror piece - VxVM 3.5

[robertinoau]

I see that there are alot of threads for the question
and I haven't read them yet, so please forgive me if I
am repeating what others may have already said.

My first question is why add a 3rd mirroring without
enabling it?  Why not just create the 3rd mirror when
you are ready?  You are not going to get any benefit
if you create it now and disable it.

If you still insist, then you will have to do it the
hard way by creating a subdisk and plex.  You then
attach the subdisk the plex.  Then when your ready,
you attach the plex to the volume.  

To create your subdisk:

vxmake -g dg_name sd subdisk_name disk_name offset
length

To create your plex:

vxmake -g dg_name plex plex_name sd=subdisk_name

To associate subdisk to plex:

vxsd assoc plex_name subdisk_name

To associate plex to volume:

vxplex -g dg_name att volume_name plex_name


So you need to run 4 commands, as opposed to just one
using vxassist -b (the -b puts it in background mode)

No offence intended, but what you want to do makes no
sense and has no benifit.


Good luck.

 --- "Ruddle, Dave" <Dave.Ruddle at fujitsu-siemens.com>
wrote: > Hello
> 
> I have an FSC Primepower Solaris server running
> Solaris 8 and VxVM 3.5.
> I have a number of mirrored volumes created and I
> want to add a third
> piece to the mirror, but not enable it until a later
> date (about a week
> later) in order to prepare for a storage system
> upgrade.
> 
> I have seen that you can add a mirror piece with
> vxassist but this seems
> to add the piece and enable it in one go, and I cant
> see a way to do
> these 2 functions seperately.
> Also, will I still need to edit the
> /etc/vx/bin/vxmirror file to enable
> it to use more than 2 pieces in a mirror, or is this
> change incorporated
> in VxVM3.5 ???
> 
> Many thanks
> 
> Dave Ruddle
> Professional Services Consultant
> 
> Fujitsu Siemens Computers
> Venture House
> Arlington Square
> Bracknell
> Berks RG12 1WA
> 
> Tel:          +44 (0)1344 475335
> Fax:         +44 (0)1344 475906
> Mobile:     +44 (0)7867 834074
> Email:      mailto:dave.ruddle at fujitsu-siemens.com
> Internet:   http://www.fujitsu-siemens.com
> 
> 
>  

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