I am assuming this is related to the file system the drive is formatted with, but I can't seem to find this information anywhere.

Also, why do they limit the installation of unRAID to only a USB and not traditional boot media (e.g. an SSD)? I know they use the GUID of the drive for license purposes, but surely they could use some other form of HWID. It would definitely be more professional/reliable than a USB boot.

1 Answer

Why is the max size for the boot USB drive 32GB for unRAID OS?

The developers have specified this limitation, and it is documented in Hardware Recommendations for System Builders:

USB Flash Device

unRAID Server runs entirely from RAM, minimizing writes to the Flash device; however, it is also used to store vital system configuration data and must remain installed in your server during operation. In addition, to obtain a registration key for unRAID Server OS, your flash device must contain a unique GUID (Globally Unique Identifier) and needs to be at least 512MB, but no larger than 32GB in size. Also, please make sure you are using a well known brand and not using a card reader.

(emphasis mine)

Source Guidelines for System Builders - Lime Technology

If you want to know why you should ask on their General Support forum, as only the developers can answer this.


Why do they limit the installation of unRAID to only a USB and not traditional boot media (e.g. an SSD)?

That is a question you should ask on their General Support forum, as only the developers can answer this.

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