On 14/02/2012 00:00, Riyaj Shamsudeen wrote: > I don't recollect exact details, but disk VTOC (Volume Table of > Contents) information is kept in the initial part of the disk, in > Solaris. You have to skip 1MB, so that VTOC is not overwritten. This > applies only to Solaris, AFAIK. Hi Riyaj, thanks for pointing this out. Yes, now I remember that I wasn't able to make the partitions visible for asm disk creation until I partitioned the disks using a non-default offset. This requirement is documented in the Install guide for Solaris: Oracle Solaris fdisk partitions must start at cylinder 1, not cylinder 0. Best regards Dimitre > Cheers > > Riyaj Shamsudeen > Principal DBA, > Ora!nternals - http://www.orainternals.com - Specialists in > Performance, RAC and EBS > Blog: http://orainternals.wordpress.com > OakTable member http://www.oaktable.com and Oracle ACE Director > > Co-author of the books: Expert Oracle Practices > <http://tinyurl.com/book-expert-oracle-practices/>, Pro Oracle > SQL,Expert PL/SQL Practices > <http://tinyurl.com/book-expert-plsql-practices> > > > > > On Mon, Feb 13, 2012 at 4:31 PM, Radoulov, Dimitre > <cichomitiko@xxxxxxxxx <mailto:cichomitiko@xxxxxxxxx>> wrote: > > Hi all, > target environment: > > 11.2.0.3 RAC on RHEL 5.7 x86-64 > SAN HP 3PAR > > I'm reading the following note on MOS: RAC and Oracle Clusterware Best > Practices and Starter Kit (Linux) [ID 811306.1], > in the attached document RACGuides_Rac11gR2OnLinux.pdf is a step > by step > description of the GI and RAC installation process. > > Does anyone know what's the reason for the requirement for 1 MB offset > for the first sector > and if this requirement is valid on certain types of storage only? > > > 3.1.1. Partition the Shared Disks: > > 1. Once the LUNs have been presented from the SAN to ALL servers > in the > cluster, partition the LUNs from > one node only, run fdisk to create a single whole-disk partition with > exactly 1 MB offset on each LUN to be > used as ASM Disk. > > > > Thanks > Dimitre > > > > -- > //www.freelists.org/webpage/oracle-l > > > -- //www.freelists.org/webpage/oracle-l