TerraMaster Forum

I've been using a F2-210 for a while and decided to upgrade to the F4-422. I had recently upgraded the HDD in the old NAS to 10TB Ironwolf Pro and all was working well. I put the HDD in the F4-422 and it prompted me to install the TNAS which I did, initially installing the 5.0.176, then checking the amount of storage in / as suggested, then upgrading to 5.1.67 with an online update. The Volume and Storage pool both report Normal but the HDD manager reports HDD2 as unmounted. I've seen a couple of other posts where users have HDD2 unmounted issues but don't see a resolution, I have removed, reinserted and rebooted several times, SMART doesn't report any problems - any suggestions how to remedy this or is it an anomaly on the TNOS

Also, I have 2 external USB HDD, both worked in the F4-210. They both report as normal in the HDD manager but the USB manager reports no mounted USB device. I can see and mount both drives on my windows PC - how do I mount these on the TNOS so I can use the USB backup app?

Any help welcome, I suspect it's me not seeing something obvious.

As an update, I installed 4.2.40 from the initialisation and the HDD and USB all mount as expected. I then tried to update to TOS 5 (2 different versions) and it just hangs at the unzipping phase. So I guess I'm going to have to try new installs of various TOS5 flavours to see if I can get one of them to mount the USB drives.

You are not taking the correct approach to upgrading to TOS5. Please refer to this for what you need to know:
viewtopic.php?f=28&t=4912

What about TOS 5.0? The link you posted only mentions TOS5.1

It doesn't really matter about 5.0. Moving up from 1 version to the next does not automatically modify the OS partition size (which I guess is your issue here).

Sometimes you can operate higher versions of the OS at smaller OS partition sizes (tends to depend on your usage) but, at some point you are going to be well and truly st***ed. And, then when TOS6 arrives it will not even let you update without having increased the OS partition size.

IMO those who think it {doesn't apply/isn't needed/it can be avioded by obscure work-arounds/etc} are miss-guided. And, don't bother complaining because it isn't going to be changed (as far as I can see)