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

Wed Apr 21 07:04:56 CDT 2004

Hi,
Not sure I understand, is is not possible to use vxassist (to mirro) at the
time that you actually need the 3rd mirror ?
I suppose there are methods to prepare the thrid plex but they are a bit
cumbersome ie
    - Create a new volume to the size of the source volume on the specified
disk
    - stop the new volume (vxvol stop vol)
    - dis-associate the plex from the new volume (vxplex dis)
    - At the time the new mirror is to be sync'd, attach it to the source
volume (vxplex att source_vol plex3)

As for vxmirror, its still limited to adding a signle mirror. Its designed
to look for volumes that are currently non redundant (do not contain
subdisks on different disks).

cheers
tony
-----Original Message-----
From: veritas-vx-admin at mailman.eng.auburn.edu
[mailto:veritas-vx-admin at mailman.eng.auburn.edu]
Sent: 21 April 2004 11:34
To: veritas-vx at mailman.eng.auburn.edu
Subject: [Veritas-vx] Adding a third mirror piece - VxVM 3.5

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>
mailto:dave.ruddle at fujitsu-siemens.com 
Internet:    <http://www.fujitsu-siemens.com> http://www.fujitsu-siemens.com

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