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This is good to know. I haven't had issues with using a USB drive though, since it doesn't receive many reads or writes - the system is copied to a RAM drive on boot and runs off that rather than the USB.
I assume this means I'd need another drive to boot it from? My current setup is that I have 2 x 22TB drives in a ZFS mirror for data storage, and 2 x 2TB NVMe SSDs in a ZFS mirror for things like VMs, Docker containers, documents, etc.
If they had done this 6 months ago, I would have probably picked Unraid. I hated the idea of using a USB boot device, so I went with TrueNAS instead.
Yeah, that's absolutely understandable. It was definitely a much needed option for far too long.
That's pretty neat that the TPM can be used that way, maybe worth migrating over. The flash drive always made me so nervous.
So after the migration, my boot drive and flash drive could both fail, and I could plug in a new unraid boot/flash drive, it'd read my license, and it'd just work?
Yep! Your license would be tied to your TPM GUID and not your flash drive after migration. You might have to activate your license if it's a fresh install, but it should be read from your TPM.
Very neat! I'll try it out sometime. What does it use for a boot device? Cache drive?
It uses an individual drive for it - so your cache and array are separate and you'll need to install a drive for boot purposes. It does support pooling though, so you can have multiple boot drives in the boot pool, for example. In that case, it will fail over to the secondary drive if your primary dies.
I had to get a Supermicro AOM-TPM-9665V TPM chip for my motherboard
How old is your CPU that it doesn't have onboard TPM? It's been a standard feature for quite a while now
My Epyc 7702 does have onboard TPM, but my supermicro H11DSi-NT doesn't pass it through to the OS, for some reason. It seems like it's a common thing for supermicro boards - the enterprise ones like mine have TPM headers instead. I do wish that weren't the case, though.
On my second Unraid server (which I use for transcoding), the i9-12900T's TPM does pass through properly and I was able to use it, no external TPM needed.
My Epyc 7702 does have onboard TPM, but my supermicro H11DSi-NT doesn't pass it through to the OS, for some reason
Huh... That's interesting. At my workplace we have Linux EPYC servers with working TPM (it's mandated that all computers, both clients and servers, must have TPM 2.0), but I'm not a hardware person and don't know exactly how they're configured.