Data Domain: How to Mount BoostFS for Windows Storage‑Units

Summary: This article explains how to configure and mount multiple BoostFS for Windows storage‑units by editing the boostfs.conf file. It describes how the storage-unit parameter works, how to define UNC‑based mount sections, and how to assign drive letters for independent mounts. ...

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Instructions

BoostFS for Windows supports more than one storage‑unit by allowing multiple configuration blocks in the boostfs.conf file. There are two ways to define a storage‑unit, and they behave differently depending on how the mount is performed.

1. Storage‑Unit Definition Methods

Method 1: Global Storage‑Unit Parameter

Located near the top of the boostfs.conf file:

# Storage Unit
# storage-unit=su-name

This parameter is used when hostname and storage‑unit are not specified in the mount command.
If configured, BoostFS uses this storage‑unit as the default.

A drive letter can be assigned later in the file.

Method 2: UNC‑Based Storage‑Unit Sections (required for multiple storage‑units)

At the bottom of the boostfs.conf file, BoostFS provides explicit instructions for defining mount points:

# UNC Mount point sections are delineated by [UNC Path]
# The UNC Path must be of the form [\\ddr-name\su-name].
# Forward slashes and extra slashes must not be used.

Each storage‑unit must be defined using:

    1. A UNC path in square brackets, for example:

      [\\ddr-name\su-name]

    2. A drive-letter mapping, for example:

      drive-letter=f:

These UNC blocks allow multiple, independent storage‑unit mounts.

Important:
A drive letter must follow its corresponding UNC block.
This method is required when mounting more than one storage‑unit.

2. Example Configuration for Multiple Storage‑Units

The following example defines two storage‑units, each with its own drive letter:

[\\DataDomain\first-storage-unit]
drive-letter=f:

[\\DataDomain\second-storage-unit]
drive-letter=h:

With this configuration:

    • Each storage‑unit can be mounted and unmounted independently.
    • BoostFS correctly maps each UNC path to a Windows drive letter.

3. Mount Limitations

  • Only one mount is allowed per storage‑unit.
    A storage‑unit cannot be mapped to multiple drive letters simultaneously.

Affected Products

Data Domain, Data Domain Boost – File System
Article Properties
Article Number: 000008990
Article Type: How To
Last Modified: 09 مارس 2026
Version:  6
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