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 FEBRUARY 13, 2025
Applies to:
Sun ZFS Storage 7120 - Version All Versions and laterSun Storage 7410 Unified Storage System - Version All Versions and later
Sun Storage 7310 Unified Storage System - Version All Versions and later
Oracle ZFS Storage Image for OCI - Version All Versions and later
Oracle ZFS Storage ZS3-2 - 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 |