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Yes—you can use haneWIN NFS Server on Windows as an NFS 3 datastore target for VMware ESXi. Install the haneWIN service and PortMap daemon, export a local NTFS folder to the ESXi VMkernel IP, allow the required traffic through Windows Firewall, and add the export as an NFS 3 datastore. This is a practical arrangement for labs, ISO repositories, backups, and temporary test VMs—not a replacement for redundant, vendor-supported production storage.

What you need

  • Windows 7, Windows 10, or Windows 11 with administrator access. Windows 7 is obsolete and should be limited to isolated laboratory use.
  • The current haneWIN NFS Server installer. The product page currently lists version 1.2.69; verify the version before downloading at hanewin.net/nfs-e.htm.
  • A fixed or DHCP-reserved IP address for the Windows computer.
  • A local NTFS directory, for example D:ESXi-NFS.
  • An ESXi VMkernel interface that can route to the Windows IP.
  • Firewall rules for haneWIN NFS and PortMap traffic.
  • Reliable power, storage, and enough free disk space for the intended workload.

haneWIN documents NFS 2 and NFS 3, with TCP and UDP support. It does not list NFS 4.1, so select NFS 3 in ESXi. NFS 3 also supports 64-bit file offsets, avoiding the 2-GB limitation associated with NFS 2 (haneWIN FAQ).

Install haneWIN NFS Server

  1. Download the service installer from the official haneWIN product page.
  2. Run the installer as an administrator.
  3. Install both NFS Server and the PortMap daemon. PortMap (SunRPC port 111) is involved in mount negotiation.
  4. Restart Windows if the installer requests it.
  5. Open the haneWIN NFS Server Control Panel applet using Run as administrator. On Windows 7 and later, opening it without elevation can leave configuration controls disabled or greyed out.

The service installer is preferable to portable mode for an always-on lab server because it can start automatically with Windows. On Windows 11, check haneWIN’s current compatibility notice: its update information says Smart App Control can block the installer and software. Do not casually disable a security control; use an approved deployment method or another NFS server if policy forbids it.

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Create a suitable Windows folder

Create the directory before configuring the export:

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D:ESXi-NFS

Use a local NTFS volume or ordinary directory. Do not export a mapped drive letter: mapped drives are tied to an interactive user session. If the data is on a remote SMB location, haneWIN’s documentation says to use a UNC path instead. Avoid complicated junction chains, mount-point layouts, or subfolders from other volumes until the basic export works.

Configure the haneWIN export

  1. Open the haneWIN Control Panel as administrator.
  2. Go to Exported folders and add an entry.
  3. Select D:ESXi-NFS.
  4. Authorize the exact ESXi host IP, or the dedicated storage subnet. For example: 192.168.10.21.
  5. Leave the export writable for VM files. Use read-only for an ISO or reference directory.
  6. Save the configuration and restart the NFS service if haneWIN requests it.

A conservative single-host export is conceptually:

D:ESXi-NFS    192.168.10.21

For another host, add its address explicitly rather than opening the share to every network. haneWIN uses a Unix-like export format but retains Windows directory syntax. Its documented options include -name, -readonly, -alldirs, -i32, and -umask. Enter options through the export editor and confirm the resulting export in haneWIN’s display.

Use the advertised NFS path, not the Windows path

An optional export name can make the remote path clearer, for example:

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-name:ESXi-Datastore

Do not assume that ESXi should receive D:ESXi-NFS. VMware needs the remote NFS export path shown by haneWIN, commonly something like:

/ESXi-Datastore

The exact path depends on your export configuration. Verify it before opening the ESXi wizard.

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Inode and permission options

On supported NTFS volumes, haneWIN can use 64-bit NTFS file IDs as NFS inodes. If a client reports inode-size problems, disable that behavior in the control panel or add -i32. haneWIN’s default Unix-style umask is 022; this is not equivalent to ordinary Windows ACL enforcement.

Allow NFS and PortMap through Windows Firewall

haneWIN supplies a firewall.bat example. This is usually the quickest starting point: apply it, inspect the resulting rules, and restrict their remote addresses to the ESXi hosts or storage VLAN. At minimum, review rules for:

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  • NFS, normally TCP and UDP 2049.
  • PortMap, normally TCP and UDP 111.
  • Any additional dynamic mount-related port used by your haneWIN configuration.

Do not assume that opening only 2049 is always sufficient. The exact mount behavior depends on haneWIN settings. You can inspect listeners with:

Get-NetTCPConnection -State Listen
Get-NetUDPEndpoint

Keep NFS off the public internet. Use a dedicated storage VLAN where possible, apply the correct Windows network profile, and restrict inbound rules to the ESXi VMkernel addresses.

Verify ESXi network reachability

A ping from a guest VM or your workstation does not prove that ESXi can mount the export. NFS traffic uses an ESXi VMkernel interface and its routing. From the ESXi shell, test the intended VMkernel:

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vmkping -I vmk0 192.168.10.10

Replace vmk0 and the address with your actual storage VMkernel and Windows NFS IP. If this fails, check VLAN tagging, switch access, uplinks, routing, and VMkernel selection. Broadcom’s ESXi network troubleshooting guidance explains why ordinary host reachability can be misleading.

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Add the datastore in vSphere Client

  1. Sign in to vSphere Client.
  2. Select the ESXi host or cluster, then open Storage > Datastores.
  3. Choose New datastore.
  4. Select NFS and choose NFS 3.
  5. Enter a datastore name.
  6. Enter the Windows server IP address or hostname.
  7. Enter the exported remote folder, including its leading slash.
  8. Select the hosts that should mount it and complete the wizard.

Example values:

Datastore name: ESXi-Windows-NFS
NFS server:     192.168.10.10
NFS version:    NFS 3
Folder:         /ESXi-Datastore

vSphere 8 continues to support NFS datastores, but haneWIN’s documented protocol support is still NFS 2/3—not NFS 4.1 (Broadcom NFS guidance).

Add it with ESXCLI

For ESXi 7 and 8-style command-line administration:

esxcli storage nfs add 
  -H 192.168.10.10 
  -s /ESXi-Datastore 
  -v ESXi-Windows-NFS

Here -H is the server identifier, -s is the exported path, and -v is the local datastore label. Verify the mount:

esxcli storage nfs list

To remove it after migrating or shutting down workloads:

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esxcli storage nfs remove -v ESXi-Windows-NFS

Never remove an active datastore without first migrating or stopping its workloads.

Keep mounts consistent across ESXi hosts

For a shared datastore, use the same server identifier everywhere: either the IP address on every host or the same FQDN on every host. Also keep the export path and NFS version identical. Broadcom documents an NFS 3 issue in which mounting the same export by IP on one host and FQDN on another can produce different datastore UUIDs (Broadcom KB).

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Verify operation before using real workloads

  1. Confirm the datastore is mounted in vSphere and with esxcli storage nfs list.
  2. Create a test folder.
  3. Upload a small ISO or test file.
  4. Confirm the file appears in the Windows directory.
  5. Restart the haneWIN services and repeat the test.
  6. Reboot Windows and observe recovery before placing important VMs on the datastore.

Troubleshooting by symptom

haneWIN controls are greyed out

Close the applet and relaunch it with Run as administrator.

ESXi can ping Windows but cannot mount

Run vmkping from the correct VMkernel. Then check storage VLANs, routing, Windows Firewall, running haneWIN services, PortMap, and whether the ESXi IP is authorized in the export.

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“Folder not found” or invalid path

Use the NFS path advertised by haneWIN, not D:ESXi-NFS, and include the leading slash. A missing slash is a documented ESXi mount error (Broadcom KB).

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PortMap is stopped

Check Windows Services for both the haneWIN NFS service and PortMap daemon. A missing or blocked PortMap service can prevent mount negotiation.

Changes do not take effect

Malformed export syntax, a wrong Windows path, or a required service restart can leave the old configuration active. Restart haneWIN after changing version, port, or related NFS settings.

Reads work but writes fail

Check that the export is not read-only and that the Windows service account can write to the directory. haneWIN documents client identity mapping in which root can become NOBODY; -maproot:0 may resolve specific compatibility cases, but broad root mapping reduces isolation and should be used cautiously.

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Files fail near 2 GB

Confirm that ESXi is using NFS 3, not NFS 2. NFS 2 uses a 32-bit file offset; NFS 3 supports 64-bit offsets.

Different inode behavior

Try the haneWIN inode compatibility setting or -i32 if a client cannot handle 64-bit inode values.

The datastore disappears after a Windows reboot

The NFS server is unavailable while Windows or its services are starting. Use a UPS, automatic service startup, reliable disks, and recovery testing. Avoid critical production workloads on a desktop-hosted export.

Is haneWIN suitable for production?

Usually no. haneWIN provides an NFS protocol endpoint; it does not add RAID, redundant controllers, replicated storage, enterprise snapshots, multipathing, VAAI integration, or vendor-certified VMware support. A single Windows workstation and disk can fail, reboot, install updates, or lose power. For production, use a storage platform with documented VMware compatibility, redundancy, monitoring, backups, and a tested recovery process.

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haneWIN is reasonable for a home lab, VMware training, migration staging, ISO storage, backup targets, non-critical test VMs, or a small environment where reusing an existing Windows machine matters more than resilience. For dedicated storage, consider TrueNAS, a Synology or QNAP appliance, a Linux NFS server using Ubuntu Server, or Windows Server’s native NFS role documented by Microsoft.

Security and reliability checklist

  • Use a reserved or static Windows IP.
  • Restrict exports to ESXi VMkernel IPs or a storage VLAN.
  • Allow only the required NFS, PortMap, and configured mount traffic.
  • Never expose the service directly to the internet.
  • Keep Windows and haneWIN patched.
  • Use a UPS and automatic service startup.
  • Back up the datastore; an export is not a backup by itself.
  • Test service restart, Windows reboot, and datastore recovery.
  • Do not treat haneWIN’s Unix-style mappings as a substitute for a carefully designed Windows ACL and identity model.

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