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Update docs/notes/v6.0.0.md
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Co-authored-by: Andrea Longo <[email protected]>
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cniackz and feorlen authored Jun 26, 2024
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`spec.pools.*.volumesPerServer` and `spec.pools.*.servers` fields are immutable once created, ensuring the number of servers or volumes in an existing pool does not change. It was introduced in Operator v5.0.15 with PR https://github.com/minio/operator/pull/2070 and is a safety net to prevent potentially dangerous changes to an existing pool. This also matches similar behavior in Operator Console.

Some of the reasons might be in need to modify this values are expanding storage, this should be made adding a pool,
see [Expand a distributed MinIO Deployment](https://min.io/docs/minio/linux/operations/install-deploy-manage/expand-minio-deployment.html)
for this.
To expand storage, add an additional pool.
See [Expand a distributed MinIO Deployment](https://min.io/docs/minio/linux/operations/install-deploy-manage/expand-minio-deployment.html)
for more information.

On the other hand, the removal of servers no longer in use or ready to be decommissioned should be carefully taken care
of by [Decommission a Tenant Server Poo](https://min.io/docs/minio/kubernetes/upstream/operations/install-deploy-manage/modify-minio-tenant.html#decommission-a-tenant-server-pool)
not individual nodes or drives.
To reduce storage capacity, remove pools no longer in use by decommissioning them. See [Decommission a Tenant Server Pool](https://min.io/docs/minio/kubernetes/upstream/operations/install-deploy-manage/modify-minio-tenant.html#decommission-a-tenant-server-pool)
for details.
If a drive is misbehaving or failing follow the [Drive Failure Recovery](https://min.io/docs/minio/kubernetes/upstream/operations/data-recovery/recover-after-drive-failure.html#minio-restore-hardware-failure-drive)
guide, if a node is failing follow Node [Failure Recovery guide](https://min.io/docs/minio/kubernetes/upstream/operations/data-recovery/recover-after-node-failure.html).

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