Connecting an NS372TB3 Netstor Enclosure

The Netstor has space for two LTO drives and built in Thunderbolt 3 ports allowing direct connection to a Mac

YoYotta runs well on the new Apple Silicon M1 Macs and macOS 11 Big Sur.
However the Netstor unit needs new software drivers for the internal ATTO card.
Netstor will not work with Big Sur until the new drivers are installed.

Connect the unit

After connecting power plug in a Thunderbolt cable and the drives will power on. Wait a few minutes for the drives to boot up. Open the YoYotta app.

Now click the LTFS button on the toolbar of YoYotta. This will check and prompt to download the LTFS frameworks needed.
Wait until the message Update completed OK appears.
YoYotta LTFS will now be able to control this drive.
Check the Support page to watch a video showing LTFS archiving along with links to all the help topics.

If the drives do not appear then follow the instructions below.
When the computer sleeps or is shutdown or the Thunderbolt cable is disconnected, the LTO drives will power off, so make sure that tapes are ejected.


Checking hardware devices

To check that the Mac can see the Netstor drive hold the alt key on the Mac keyboard, click the Apple Menu and select System Information...


Check for Thunderbolt devices

If the Netstor NS372TB3 is not shown, then check the power and try reconnecting or using a different Thunderbolt cable.
If there is a Netstor thunderbolt interface, then the next step is checking for the SAS tape drive.


Check for SAS devices

Make sure the Netstor drive is connected and powered on, now one or two SCSI Target Devices will be visible. These are the SAS tape drives.
If there are no SAS devices, please install the ATTO H608 driver as described below. If the driver is installed then contact support at Netstor for assistance.
The System Information page does not refresh automatically. Click File, Refresh Information or Command + R to refresh the hardware listing.


ATTO SAS install

Keep the SAS card inside the NetStor updated.
  • Download the macOS Config Tool, macOS driver and macOS Flash Bundle from ATTO SAS downloads
  • Install the Config Tool and the macOS driver
  • Allow the driver in Apple System Security as described below
  • Run the ATTO Config Tool
  • Check and update the card firmware. It needs to be 2018 or newer
  • Reboot the drive and Mac
The PCIe card can go inside a MacPro with PCIe slots or in a Thunderbolt expansion like the Sonnet Echo Express SEL shown here.
The Sonnet Echo Express SEL is a compact Thunderbolt enclosure that holds a PCIe card like the ATTO H680. A lot of our customers use this to connect to a desktop SAS LTO drive or tape library. Get the Thunderbolt 3 unit as this means that there is plenty of bandwidth for multiple LTO drives and also daisy chaining other Thunderbolt units. The Apple TB3 -> TB2 adaptor allows connection to older Thunderbolt 2 Macs. There are also other units that hold more than one card.

ATTO ThunderLink SH1068, SH2068 TB-SAS, ThunderStream SC3808, SC4808 adaptors, R680 or R644 PCIe RAID SAS cards do not support TLR which is a required protocol. So they are not compatible with LTFS running on any operating system.
These interfaces are not compatible with tape drives as they do not support TLR protocol. As a temporary workaround when using with LTO tape drives with these interfaces the link speed should be set to 3Gb/s. However there may still be errors. See section at bottom of this page.


Allow system software in System Security

The first time after you install drivers on a new system, you will need to approve the new System Software. New installs of system software from YoYotta, ATTO, OSXFUSE (developer is Benjamin Fleischer) and other drivers may need approval.
You will see a message like this saying System Extension Blocked
Open the Security & Privacy page in Apple System Preferences, unlock the padlock and click Allow to enable the System software to load.

You must click the Allow button locally on the Mac, clicking using remote screen sharing will not work.
If the Allow button is not shown then reboot your Mac, try again to use an LTFS or TAR tape (which will fail) and then check the Security & Privacy page again.
Also ensure that you have the latest macOS 10.13.6, 10.14.6, 10.15.7 or 11.2.3


Files and Folders access

With Catalina and Big Sur when running YoYotta you may see requests to allow access to folders like Documents, Removable Volumes or Network Volumes. Please allow these requests.
Also you can enable access in Files and Folders in the Security tab as shown in the screenshot.
YoYotta does not need Full Disk Access.


Open YoYotta

In the log there will a message showing that the drives have been detected.


Open LTFS panel

Now click the LTFS button on the toolbar of YoYotta. This will check and prompt to download the LTFS frameworks needed. Wait until this completes, then open the panel again.
YoYotta LTFS will now be able to control this drive.

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