Upgrade Disks in A1000 with VXVM/VCS

From: Bhavesh Shah (bshah_at_citadon.com)
Date: 11/18/05

  • Next message: Daniel Nuno: "Solaris 9 + sendmail + smarthost" 
    Date: Fri, 18 Nov 2005 12:02:14 -0800
To: <sunmanagers@sunmanagers.org>

    Hi Gurus,
    Need your expertise/suggetions with Disks upgrade A1000s under VXVM and
    VCS control.
    We have two A1000s connected between two E4500 in VCS control (cross
    connected). Both are running Oracle DB in Production enviornment. The
    configuration is as below:
    Setup:
    OS: Solaris 8
    First A1000 - 6 Disks LUN0 - DB1
                      - 5 Disks LUN1 - DB2
                      -1 Disk HotSpare
    Second A1000 - 6 Disks LUN0 -DB1
                          - 5 Disks LUN1 -DB2
                          -1 Disk HotSpare
    LUN0 DB1 on both A1000s are Mirrroed with VXvm 3.5
    LUN1 DB2 on both A1000s are mirrored with VXvm 3.5
    and both are VXFS.

    Issue: We are running out of disk space on Mirrored volumes so am
    planning replace both LUNs in A1000s with higher capacity Disks (from
    18G to 36G).

    Plan:
    1) Remove DB1 LUN0 Disks (all 6 Disks from one A1000)
    2) vxprint -ht
    3) Break the mirror (vxplex -dis plex_name)
    4) Insert 6X36G Disks and create LUN0 with rm6
    5) put the LUN0 in Veritas control.
    6) Re-establish mirror (vxplex -att volume_name New_plex_name)
    7) Once sync completely remove the LUN0 DB1 from other A1000 and do the
    same.
    8) Repeat the same procedure for LUN1.

    Questions:
    1) Will above plan work without any interruption and Data loss?
    2) Am i missing anything important in the above plan
    3) Once i remove the disks from A1000 (6 Disks from LUN0 say) does
    vxprint -ht will tell me which plex i need to disassoiate?
    4) Better solution to this approch?

    Any pointer/help will be greatly appreciated.
    I will summarize.
    Best Regards
    B
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