Oracle ZFS Storage Appliance: How to avoid misalignment when using ASM on Solaris clients (Doc ID 2036559.1)

Last updated on SEPTEMBER 13, 2016

Applies to:

Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-2 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-4 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-BA - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Goal

From the different ASM documentation available in the web, misalignment issues are not emphasized enough.
One can even find this :
Each disk is formatted and a partition is created starting from 1 cylinder.
The available disks can be seen using the format command as shown below […]

Using cylinder 1 of slice0 will clearly lead to miss-alignments and extra IOs, as described here :
http://blogs.oracle.com/dlutz/entry/partition_alignment_guidelines_for_unified

Solution

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