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Sun Storage 7000 Unified Storage System: How much free space to leave when configuring a pool with LUNs (Doc ID 1995759.1)

Last updated on JANUARY 08, 2018

Applies to:

Oracle ZFS Storage ZS3-2 - Version All Versions and later
Oracle ZFS Storage ZS4-4 - Version All Versions and later
Sun Storage 7210 Unified Storage System - Version All Versions and later
Sun ZFS Storage 7420 - Version All Versions and later
Sun ZFS Storage 7320 - Version All Versions and later
7000 Appliance OS (Fishworks)

Purpose

The purpose of this document is to advise about free space reservation as we configure LUNs. We need to allow enough space for metadata so that the pool on the ZFS Storage Appliance will not fill up before the LUN fills up.

Scope

There is a bug on the appliance which does not allow ZFSSA to calculate the right refreservation value for LUNs.

Details

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In this Document
Purpose
Scope
Details
 1- Example with the default blocksize, 8K
 2- Example of a big lun/small block size
 3- Conclusion

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