[Veritas-vx] Mirror 5 column stripe to single subdisk?

[William Havey]

Use the layout= parameter to specify the mirror will have a different layout
than the existing plex.

On Fri, Sep 10, 2010 at 3:06 PM, Mark Schipper
<Mark.Schipper at syniverse.com>wrote:

>  Hello all,
>
>
>
> I have a new 3par array that uber-stripes everything before you even create
> a LUN. The short story is…striping at the VXVM level does not buy you
> additional performance (if you have a single 3PAR array). I have some
> volumes that are on 4 column stripes (hardware RAID5 on the array) and I
> would like to move these volumes to the new 3PAR array. But vxassist doesn’t
> want to let me mirror a plex made of 4 subdisks to a plex made of 1 subdisk,
> or so I am guessing.
>
>
>
> Does anyone know of a way to mirror, migrate or evacuate a 4 column striped
> volume to a single plex and single subdisk?
>
>
>
> Here’s a snapshot:
>
>
>
> [12:07:53][root at nfs08:/]# vxprint -htg epmnfsdg
>
> DG NAME         NCONFIG      NLOG     MINORS   GROUP-ID
>
> ST NAME         STATE        DM_CNT   SPARE_CNT         APPVOL_CNT
>
> DM NAME         DEVICE       TYPE     PRIVLEN  PUBLEN   STATE
>
> RV NAME         RLINK_CNT    KSTATE   STATE    PRIMARY  DATAVOLS  SRL
>
> RL NAME         RVG          KSTATE   STATE    REM_HOST REM_DG    REM_RLNK
>
> CO NAME         CACHEVOL     KSTATE   STATE
>
> VT NAME         RVG          KSTATE   STATE    NVOLUME
>
> V  NAME         RVG/VSET/CO  KSTATE   STATE    LENGTH   READPOL   PREFPLEX
> UTYPE
>
> PL NAME         VOLUME       KSTATE   STATE    LENGTH   LAYOUT    NCOL/WID
> MODE
>
> SD NAME         PLEX         DISK     DISKOFFS LENGTH   [COL/]OFF DEVICE
> MODE
>
> SV NAME         PLEX         VOLNAME  NVOLLAYR LENGTH   [COL/]OFF AM/NM
> MODE
>
> SC NAME         PLEX         CACHE    DISKOFFS LENGTH   [COL/]OFF DEVICE
> MODE
>
> DC NAME         PARENTVOL    LOGVOL
>
> SP NAME         SNAPVOL      DCO
>
> EX NAME         ASSOC        VC                       PERMS    MODE
> STATE
>
> SR NAME         KSTATE
>
>
>
> dg epmnfsdg     default      default  61000    1109834580.1790.nfs01
>
>
>
> dm TESTDEV      STK14_SUN3_19 auto    65535    4878540732 -
>
> dm epmnfsdg20   STK03_SUN3_1 auto     86783    1425889280 -
>
> dm epmnfsdg22   STK03_SUN3_9 auto     86783    1425889280 -
>
> dm epmnfsdg25   STK03_SUN3_19 auto    86783    1425889280 -
>
> dm epmnfsdg26   STK03_SUN3_20 auto    86783    1425889280 -
>
>
>
> v  mmsc000      -            ENABLED  ACTIVE   14518272 SELECT
> mmsc000-01 fsgen
>
> pl mmsc000-01   mmsc000      ENABLED  ACTIVE   14535680 STRIPE    4/64
> RW
>
> sd epmnfsdg20-01 mmsc000-01  epmnfsdg20 0      3633920  0/0
> STK03_SUN3_1 ENA
>
> sd epmnfsdg22-01 mmsc000-01  epmnfsdg22 0      3633920  1/0
> STK03_SUN3_9 ENA
>
> sd epmnfsdg25-01 mmsc000-01  epmnfsdg25 0      3633920  2/0
> STK03_SUN3_19 ENA
>
> sd epmnfsdg26-01 mmsc000-01  epmnfsdg26 0      3633920  3/0
> STK03_SUN3_20 ENA
>
>
>
>
>
> [12:08:02][root at nfs08:/]# vxassist -g epmnfsdg mirror mmsc000
> alloc=TESTDEV
>
> VxVM vxassist ERROR V-5-1-437 Cannot allocate space to mirror 14518272
> block volume
>
> _______________________________________________
> Veritas-vx maillist  -  Veritas-vx at mailman.eng.auburn.edu
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>
>
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