Create a Qumulo Core USB Installer Key

IN THIS ARTICLE

Outlines how to create a Qumulo Core USB Installer key to perform a clean install of Qumulo Core on your cluster

REQUIREMENTS

USB key (4GB minimum)
Qumulo Core USB installer image from the Qumulo Care team

IMPORTANT! Only proceed with the steps below if you intend to perform a clean install of Qumulo Core on your cluster. Reference the Perform a Clean Install of Qumulo Core article for considerations and additional details.

CREATE A USB INSTALLER KEY ON A MAC

1. Open the Terminal application and login as root:

sudo -s

2. Plug in your USB key and locate the device's disk label by running the following command:

diskutil list

EXAMPLE: Our USB key is /dev/disk3 in this sample output.

Screen_Shot_2018-10-31_at_3.28.28_PM.png

3. Use the device label from Step 2 in place of diskN with the following command (and subsequent commands) to unmount the USB key:

 diskutil unmountDisk /dev/diskN

4. Replace /path/to/imgfile in the command below with the image file's path on your node to write the Qumulo Core Installer image to the USB key:

dd if=/path/to/imgfile of=/dev/rdiskN bs=2m

IMPORTANT! You may encounter an "Operation not permitted" error due to a security mechanism that prevents Terminal from having full disk access in Mac OS versions 10.14 or above. To grant privileges, add the Terminal application to Full Disk Access under the Privacy tab in the System Preferences Security and Privacy settings and relaunch Terminal. Remove Full Disk Access for Terminal once the operation is complete.

5. Lastly, run the following command to eject the newly created Qumulo Core USB Installer key:

diskutil eject diskN

CREATE A USB INSTALLER KEY ON WINDOWS

Creating a Qumulo Core USB Installer key on Windows requires the use of a third party application like Rufus to write the installer image to the USB key. While other tools (such as Win32 Disk Imager) can be used, they may encounter errors due to being unable to recognize the drive after it has been written. We recommend Rufus as it can detect all USB storage devices rather than only Windows-compatible ones.

To create the USB installer key using Rufus:

Insert the USB key into the computer and launch the Rufus application.
Specify the options as depicted in the screenshot below:
If prompted to download a new version of Grub, click No.
If prompted to download a new version of “vesamenu.c32”, click No.
Rufus will notify you that the image has been detected as an “ISOHybrid” image type and ask you how to proceed.
Select Write in DD Image mode and click OK.
Finally, click OK to confirm that the operation will destroy all existing data on the drive.