VM views the two raid groups as single LUNs. It needn't be concerned with the layout of each raid group. To change from 2 columns to 4 columns use the relayout option to vxassist and also specify the two new LUNs on which to place the two new columns.
That being said, the ISP feature of VM would allow you to drill down to individual spindles and place subdisks on each spindle. Bill On Wed, Jan 6, 2010 at 6:36 AM, <przemol...@poczta.fm> wrote: > Hello, > > we are using VSF 5.0 MP3 on Solaris 10 attached to SAN-based hardware > array. > On this array we have created 2 raid groups and on each RG we have created > a few LUNs: > > raid group: RG1 RG2 > LUN1 LUN7 > LUN2 LUN8 > LUN3 LUN9 > LUN4 LUN10 > LUN5 LUN11 > LUN6 LUN12 > > For performance reason some of our volumes are striped between the two raid > groups > (using two columns ncol=2) e.g.: > > pl <name> <vol> ENABLED ACTIVE 419256320 STRIPE 2/128 RW > > In this configuration IOs involves two raid groups. > > It seems that in the future in certain cases performance might be not as > expected > so we would like to add two additional LUNs (taken from two additional raid > groups) > and relayout the whole volume from 2-col to 4-cols e.g.: > > raid group: RG1 RG2 RG3 RG4 > LUN1 LUN7 LUN13 LUN19 > LUN2 LUN8 LUN14 LUN20 > LUN3 LUN9 LUN15 LUN21 > LUN4 LUN10 LUN16 LUN22 > LUN5 LUN11 LUN17 LUN23 > LUN6 LUN12 LUN18 LUN24 > > Is it possible to order relayout of existings volumes to spread it over all > four > RGs ? Can I point somehow that it should relayout using these particular > LUNs ? > > > Regards > Przemyslaw Bak (przemol) > -- > http://przemol.blogspot.com/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ---------------------------------------------------------------------- > Milosc, praca, pieniadze. > Sprawdz swoj horoskop na dzis >> http://link.interia.pl/f2531 > > > _______________________________________________ > Veritas-vx maillist - Veritas-vx@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-vx >
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