RAC and GPFS

Hi all,

I have 2 Oracle 10.2.0.3 RAC database instances over AIX 5.3, The OCR, Voting Disks and the data are stored in GPFS file systems.

While implementation there is a note says "Verify and change the reservation_policy to no_reserve on the disks that are used for OCR and CRS voting disks".

But today while reading an oracle Metalink note "RAC Assurance Support Team: RAC Starter Kit and Best Practices (AIX) [ID 811293.1]"

I found a point says " When implementing RAC, you must take care with the SAN storage chosen. The SAN Storage must be capable of read/write concurrency (writing at the same time from any member of the RAC cluster) through it's drivers. This means that "reserve_policy" attribute from the discovered disks (hdisk, hdiskpower, dlmfdrv, etc ) must be capable of handling settings with: "no_reserve" or "no_lock" values."