Harold:
Thank you for that explanation.
Are we going to experience performance problems (& how
significant) if we use "metainit -o" to overwrite the
default behaviour?
-- prasad
--- Harold Shaw <Harold.Shaw at Sun.COM> wrote:
> The reason that the default has changed is that a
> bugfix went into
> Solaris 10 that was later backported into Solaris 9
> that made the
> default soft partition creation cylinder aware. It
> was noticed that
> soft partitions that were created on top of stripes
> could incur
> additional physical disk IOs if they weren't aligned
> properly. This can
> be manually overridden if desired by using the '-o'
> parameter of metainit.
>
> Harold Shaw
>
> prasad wrote:
>
> >Here'a little more information about the soft
> parition difference between SDS 4.2.1 on Solaris 8
> and SVM in Solaris 10:
> >
> >Solaris_8_202# metastat -p d350
> >d350 -p d520 -o 10177 -b 2097152
> >d520 -m d420 1
> >d420 1 4 c1t2d0s0 c1t3d0s0 c1t4d0s0 c1t5d0s0 -i 32b
> >
> >Solaris_10_FCS# metastat -p d350
> >d350 -p d520 -o 10208 -b 2097152
> >d520 -m d720 1
> >d720 1 4 c2t10d0s0 c2t11d0s0 c2t12d0s0 c2t13d0s0 -i
> 32b
> >
> >where d350 is the soft parition that is created
> using "metainit d350 -p 520 1g" in both releases.
> >
> >The starting block is 10177 in Solaris 8 and 10208
> in Solaris 10. Why is the starting block different?
> Is the soft parition storing more header info in
> Solaris 10?
> >
> >-- prasad
> >This message posted from opensolaris.org
> >_______________________________________________
> >lvm-discuss mailing list
> >lvm-discuss at opensolaris.org
> >
> >
>
>
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