Mounting an iSCSI Share in Windows



This article describes how to mount a Datto iSCSI share in Windows.


  • Datto SIRIS
  • Datto ALTO
  • Datto NAS
  • Microsoft Windows


Obtaining the iSCSI target

You will need to obtain the iSCSI target in the Datto appliance's GUI to connect to the share later in Windows.

If you need to mount a cloud-based iSCSI target, contact Datto Technical Support.
For steps on creating a share, read the Creating an iSCSI file restore article.

To obtain the iSCSI target, follow these steps:

1. Access the GUI of the Datto appliance.

2. Click the File Share tab.

3. Navigate to your desired iSCSI share. Look for the address under Connecting to the iSCSI Target, as shown in Figure 1, and make note of it.

Figure 1: iSCSI target address (click to enlarge)

Mounting the iSCSI Target in Windows

You will then connect to your share by entering the iSCSI target into iSCSI Initiator:

1. On the Windows machine, search for and launch iSCSI Initiator, as shown in Figure 2.

Figure 2: iSCSI Initiator (click to enlarge)

2. In iSCSI Initiator, enter the IP address of the Datto appliance or offsite server hosting the share into the Target field, as shown in Figure 3. Then, click Quick Connect.

Figure 3: Datto NAS IP Address (click to enlarge)

4. In the Quick Connect window, click the iSCSI target you want to connect to, as shown in Figure 4. Then, click Connect.

Figure 4: Quick Connect (click to enlarge)

If the iSCSI target uses a password (such as a cloud-based target created by Datto Support) or if it is an iSCSI file restore that has CHAP Authentication enabled, you will receive an Authentication Failure message.

To resolve this error, click Connect again, then click Advanced...  In the new window, select the checkbox for Enable CHAP log on, then fill out the two files as shown in Figure 5.

  • Name: Enter the CHAP Username as defined in the iSCSI share's CHAP authentication configuration.
  • Target secret: Either enter the CHAP Secret as defined in the iSCSI share's CHAP authentication configuration, or the password provided by Datto Technical Support.

Click OK, then OK again on the window behind it. The target should now show as Connected.

Figure 5: CHAP Log on information (click to enlarge)

Configuring the iSCSI share in Disk Management

If this is a new share, you will need to initialize and format it for use in Windows the first time it is mounted:

1. Start the Disk Management program in Windows. As the program opens, the Initialization window will also display, as shown in Figure 6. Click OK.

Figure 6: Initialize Disk (click to enlarge)

2. Right-click the disk volume for the share, and then choose a volume formatting option, as shown in Figure 7.

Figure 7: Disk Management (click to enlarge)

3. If the share does not display in Windows Explorer as an available drive, you may need to mark it as Online. In Disk Management, right-click the drive, and click the option for Online, as shown in Figure 8.

Figure 8: Context menu for Disk 1 (click to enlarge)

You can now access the iSCSI share as a drive in Windows Explorer.

Copying and pasting files from an iSCSI restore through Windows Explorer may result in a loss of file/folder permissions. Datto recommends using Robocopy to copy files from the restore.

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