Think I may have to get myself one of those PDUs. I have mobility issues myself and it's frustrating that I have to ask my partner to turn things on and off when these things happen, do they work independently of the router?
Hope you will be walking around as normal soon.
Good news that you make it work, no matter you had to format to ext4. I'm mostly a MS Windows user too, and I have my HDD formatted to ext4 too.
Have a good night!
Formated 5TB to ext4 for last 10hours and drive is not recognized neither via WRT3200ACM or WRT1900ACSv2.
I will give up with openwrt. Too much time spent of my life. Firmware itself does not mount NTFS 5TB neither recongnizes ext4 5TB.
DDwrt mounts fine, but firmware itself is unstable at ll. Only reset helps.
Will probably use stock. Speeds of WiFi and NAS are OK.
Thank you all for your help!
(Apologies for going OT for a moment)
I'm using an old APC AP7920 8-port rack PDU. They're about Ā£700 new but can be had on eBay for much less second hand (as low as Ā£100 if you're lucky), just make sure it's been factory reset if you're buying used as they're a PITA to reset. Mine was given to me by a mate stripping out a datacentre at an ISP 
A decent switched PDU will give you the ability to turn individual outlets on and off via its web interface, API, SNMP or telnet/ssh and also monitor input voltage/current. A good one will also monitor current draw separately for each outlet. They're invaluable for resetting devices that are out of easy reach or don't have a physical power switch. Mine used most often for power cycling the cable modem and a Sony home theatre sound bar that goes wonky every few months.
One downside is that the outlets are all IEC C14, so you'll need to invest in some adapter cables for the kit you want to connect. All the variants for domestic kit are available, just have a search on eBay.
The unit I have connects to the wired network so is "independent of the router" so long as a) you have separate ethernet switch, b) you're not trying to access the PDU from a wireless device and your router is also doing your wireless (as obviously you won't be able to access the PDU from a wireless device with no wireless).
To be clear, my scenario yesterday was: WRT32X was up and running, providing local networking and wireless but no Internet, as the cable modem wasn't giving out a DHCP lease. My MacBook Pro was connected to the wireless so I was able to access the PDU's web interface and power cycle the cable modem (releasing the registered MAC address of the WRT32X's LAN interface). If the WRT32X had been in a state where no wireless or LAN access was available I'd have been stuck.
Thank you for the info and how you use it in your setup. 
@davidc502
Would you consider putting wireguard into your standard build? Linus Torvalds certainly has very kind words for the wireguard code-- "love" and "work of art," as I recall (http://lkml.iu.edu/hypermail/linux/kernel/1808.0/02472.html) and it's on its way to incorporation into the 5.6 kernel. Plus more and more VPN services are using it. Seems like we should join the revolution, so to speak.
I would certainly consider it, but will depend on the size. Just hit me up when the time comes and we can test together.
My biggest request from OpenWrt would be to put effort into USB 3.0 storage. With the default WRT32X Linksys firmware I sustain 80 MB/s over my network with my 3TB 5400rpm external drive on read and write. Many NAS can't even do that and it's one of the big strengths of Linksys WRT routers. It blows away other competing routers like the R7800 (much slower). It works so well with backups and Kodi streaming. If a little bit of effort went into OpenWrt I would think they could reach or even surpass stock performance there.
I get 80MB/s myself on OpenWRT on my USB 3.0 drive, so, I don't understand the problem you are trying to address here.
Coulda sworn it was a lot less performance than I was getting before, it's been my only complaint about how good OpenWrt is in general. Maybe it's settings somewhere I'll check it out thanks.
Yeah, must be! I am not on the newest David build, but have had this performance for years now on various builds. I had issues with certain Samba settings in the past that caused slow throughput, but can't recall which unfortunately.
If your using Samba, give ksbd a shot. I get decent speeds with that for sure infact I am getting max speeds from my usb keys. Might try mapping a SSD to it later and benching it.
I install luci-proto-wireguard and luci-app-wireguard each time you release a new build and Wireguard words great subsequently. Wireguard is also a super-tight code so I'd imagine the size won't be a problem. I'm happy to help test, but you'll have to tell me when the time comes to do so. 
I get maxed (115 MB/s) for a long time now with stock openwrt builds via esata. I did nothing special and got slightly slower (70-90 MB/s) speeds via USB.
Just an update couldn't get the M.2 PCI-E NVME to USB to work (unsure why but hey ho), however i did map the USB drive currently in the router on the USB Port thats not E-Sata combo and i got using ksmbd
66MB/s Read
27MB/s Write
Which for the USB i am using is correct.
Thank you so much for running those tests. I installed the package and I see around the same amount of benefit (15% or so). I didn't see any increase in speed but my CPU is no longer pressing against 100% while using the whole pipe.
This one has been beat to death in the past, and the improvement is better than a sharp stick in the eye, but not a game changer. 15% is 15% and on a router it is a marked improvement, so due to awareness of users, the option will be added to the Gui in the next built. 
lol.. Just reading the above, I guess I sound wishy-washy about it.
New build r12394 has just been uploaded to the server.
Kernel version = 4.19.106
WiFi driver = 10.3.8.0-20200206
Build = r12394
David,
You haven't updated the Downloads page yet. Admittedly, I went to your snapshot page and got r12394 but some others might not know that path.
In progress. Thanks.
Completed.