Distribute NetBoot images across server disk drives

Even with a single NetInstall server, you might improve performance by distributing copies of an image across multiple disk drives on the server. By assigning the copies the same image index ID in the range 4096–65535, you can advertise them to your clients as a single image.

Important:  Don’t distribute images across different partitions of the same physical disk drive. Doing so doesn’t improve, and can even reduce, performance.

  1. In the server sidebar, select NetInstall.

  2. Click Settings, then click Edit Storage Settings.

  3. In the Storage Data column, click the pop-up menu for multiple volumes, then choose “Image & Client Data” or “Images Only.”

    Choose volumes on different physical disk drives.

  4. Click OK, then click Images.

  5. Select an image from the list, click the pop-up menu, then choose Edit Image Settings.

  6. If the image’s index is 4095 or lower, click Edit next to the image index and enter an index in the range 4096–65535, then save the change.

  7. Open Terminal and use the scp secure copy tool to copy the image to the NetBootSPn share points on the other volumes.

    For example:

    $ scp /Library/NetBoot/NetBootSP0/image.nbi admin_name@ip_address:/Volumes/Drive2/Library/NetBoot/NetBootSP1

    where admin_name is an admin login and ip_address is the correct IP address for that server.

    You’re prompted for the password of the admin login.