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Forum Discussion
scowenhoven
May 26, 2026Aspirant
Xpenology - ReadyNAS 628X
Hello! Since the ReadyNAS is no longer supported, has anyone installed Xpenology on a 628x? If so, are there any documented instructions or videos that you followed? I currently also have a Syn...
scowenhoven
Jul 29, 2026Aspirant
Thanks for the info! So it sounds like the ReadyNAS OS is installed on the M.2 drive. So I can replace it and install another OS as long as I can get into the BIOS, change the boot order, and remove internal flash. I take it I can replace the M.2 drive to revert back to the ReadyNAS OS.
Sandshark
Jul 30, 2026Sensei
By default, there is no M.2 drive -- just an empty slot. But that is where many who have a unit with the M.2 slot (52x and 62x units) do install an alternate OS. OS6 is installed on the drives, but is booted via a reduced OS run from a USB DOM. To boot from anything other than the DOM without interaction, the DOM must be removed. Re-installing the DOM does revert to OS6 so long as you've kept its contents intact, as OS install is also performed from it.
- tigertenJul 30, 2026Luminary
I think he confuses the USB DOM with the M.2 drive.
There is one USB DOM, which is the ReadyNAS boot drive.
There is a M.2 SATA slot, which is empty. It is just a regular hard drive can be used to install alternate OSes, like windows server, TruNAS,
Xpenology boots off the USB DOM is preferred.
Clarify one misinfo, you do not have to remove the USB DOM in order to boot from the M.2. All you need is to set BIOS/advanced/Storage from the EFI to legacy. then you can choose the M.2 as the boot device.
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