# FAQ

> frequently asked questions
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## Fail to launch multi-node / multi-driver MinIO cluster.

In [Multi-Driver](/docs/minio/config#single-node-multi-drive) or [Multi-Node](/docs/minio/config#multi-node-multi-drive) mode, MinIO will refuse to start if the data dir is not a valid mount point.

Use mounted disks for MinIO data dir rather than some regular directory. You can use the regular directory only in the [single node, single drive](/docs/minio/config#single-node-single-drive) mode.

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## How to deploy a multi-node multi-drive MinIO cluster?

> Check [Create Multi-Node Multi-Driver MinIO Cluster](/docs/minio/config#multi-node-multi-drive)

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## How to add a member to the existing MinIO cluster?

> You’d better plan the MinIO cluster before deployment… Since this requires a global restart

Check this: [Expand MinIO Deployment](https://min.io/minio/linux/operations/install-deploy-manage/expand-minio-deployment.html)

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## How to use a HA MinIO deployment for PGSQL?

> Access the HA MinIO cluster with an optional load balancer and different ports.

Here is an example: [Access MinIO Service](/docs/minio/usage#access-cluster)