Re: ASM and disk partitions offset
Date: Thu, 16 Feb 2012 19:58:15 +0100
A quick follow-up on this:
we requested again from the storage team and the HW vendor to double check if partition sector alignment was "appropriate", this time (after having called their experts ...) they confirmed that it would be better to partition the disks using a different offset for the first sector (128 instead of the default - 63 in this case).
So thanks again Niall,
now I'm reading the articles you mentioned.
On Thu, Feb 16, 2012 at 11:34 AM, Niall Litchfield
> "I wouldn't bother" is probably incorrect. The details will depend on the
> array stripe size, the sector sizes and probably the specific hardware. That
> said most vendors recommend the 1mb starting point for a partition because
> it has as a common divisor most of the usual allocation unit sizes and disk
> label sizes. I quite like this article
> written from a windows perspective with SQL in mind, but really the basic
> issue isn't software specific. FWIW Oracle, Microsoft and VMWare all
> recommend that you align your storage hardware with the FS/Volume manager so
> as to avoid doing multiple IO requests where a single request would do,
> references below.