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We pay electricity based on kWh (kiloWatt hours), or you could say Wh (Watt hours). Instead of defining "efficiency", lets instead look at the number of watthours to do a computing job (Wh/job), where we don't care if it takes more time, but we only care about the product of time and watts (Wh). I thought the laptop would use less Wh to do a job vs a desktop even though the desktop could do it quicker? Assume both are modern using similar cpu topology. Has this issue been tested? I guess another question is the watts used by cpu while idling at minimum use (dockers shutdown etc). Would not the desktop CPU idle at higher watts than a laptop cpu? Has this been tested? With wattmeter (Kill-a-watt P3) I have read my unraid server at various conditions. It had 6 spinning hard drives and a 30watt laptop type cpu, and 300W PSU (gold rated). Boot: 100w for 10 seconds, then start unraid: 45w. Spin up all disks: 58w. I am not sure what tasks were running. Spin down all disks: 36w. I am not sure what tasks were running. Idle: 29w (After waiting for all startup tasks to complete, all disks not spinning, minimum tasks running) Running Roon container and playing music: 32w.

How can you shutdown Unraid automatically based on time? What is a chron job? I am unable to write code etc.

Is that uncommon? I am wondering if it is worth it to hook up a monitor and keyboard to my unraid and look into this. Right now, I am guessing my odds are low. I got a run-of-the-mill board: ASUSTeK COMPUTER INC. PRIME Q270M-C , Version Rev X.0x American Megatrends Inc., Version 1607, BIOS dated: Mon 21 Oct 2019

That one is TDP = 60 W If you care about this, some similar CPUs are about 30 W.

I think this is great. And $150/hr is reasonable. I don't think it will be too long before I use this. Yea !!!! What about also have half hour for $90 ?

Thanks. It is working and rebuilding. My mistake was when the array was stopped and i clicked on disk 4 "unassigned" to see the drop down list, I did not see that the 2nd choice was there since it looked the same as the serial number of the drive below (disk 5). I could only see the one choice which was unassigned. But now I looked really close and could see I did have the 2nd choice. So all is good now. Thanks.

The problem is I cannot rebuild disk 4 when it says "disk not installed", right? How can I rebuild disk 4? How can i get it to stop saying "disk not installed"? I know the cables are good because the replacement disk shows up in UD. But I cannot get disk4 to stop saying "disk not installed". Here is diagnostics. tower-diagnostics-20230706-2259.zip

Here is info from my email warnings over the last week, in chronological order, oldest on top: June 29, 6:09 PM Subject: Alert [TOWER] - Disk 4 in error state (disk dsbl) Description: ST8000DM004-2CX188_WCT0VFC8 (sdf) June 29, 6:09 PM Subject: Warning [TOWER] - array has errors Description: Array has 1 disk with read errors June 29, 6:43 PM Subject: Notice [TOWER] - Parity-Check finished (0 errors) Description: Duration: 2 days, 18 hours, 1 minute, 18 seconds. Average speed: 75.7 MB/s June 29, 7:55 PM Subject: Notice [TOWER] - Read-Check started Description: Size: 18.0 TB June 29, 8:18 PM Event: Unraid Disk 7 SMART health [199] Subject: Warning [TOWER] - udma crc error count is 1 June 30, 9:33 AM Event: Unraid Disk 7 SMART health [199] Subject: Warning [TOWER] - udma crc error count is 2 June 30, 10:03 AM Event: Unraid Disk 7 SMART health [199] Subject: Warning [TOWER] - udma crc error count is 3 July 1, 2:44 AM Event: Unraid Read-Check Subject: Notice [TOWER] - Read-Check finished (932 errors) Description: Canceled

Last night i powered down the Unraid tower. Today before turning on, I swapped the 18TB replacement back to the 8TB original disk4. Powered up and it will not show up on my network - will not run headless. I swapped back to the 18TB that had previously worked headless, but it remained off the network (not headless). so for any suggestions on what to do, I will be doing it with a monitor and keyboard plugged in. UPDATE. I plugged in monitor and saw the IP address changed. Using this new address, I am able now to run it from the network GUI. I am back to showing the 18TB in UD, and array disk4 is "not installed". How do I rebuild when "not installed" ? My dashboard showed this:

But to rebuild disk4 in the array, I cannot do it if it says "not installed", right? If wrong, how do I rebuild it? Do I rebuild it in UD? If I rebuild, can I rebuild the 18TB replacement, or must I rebuild the 8TB original?

here is diagnostics tower-diagnostics-20230702-0528.zip

I took out the 8TB dsk4, and replaced it with 18TB, but now it shows in unassigned devices and does not show on the array. Array still says disk4 is "not installed". How do I get it into the array? I am trying things to get the new drive to show in the array, as a choice in the disk4 dropdown: I stopped the array - it changed disk4 in the array to say "unassigned" instead of "not installed" so that feels like progress. But when I click "unassigned" there is no other choice to change it. So I still cannot get the replacement drive into the array. I stopped array and started in maintenance mode. It did not help. The replacement drive had been precleared, but I used UD to "clear" it, to see if I could get it to show up in the disk4 array dropdown, but no success. I formated it and tried again - no sucess. tried with maint. mode and regular mode - no sucess.

Is it correct that if cable swapping is successful, the drive will no longer say "not installed"? It is an 8TB drive. My parity is 18TB. I did a "read" check. It found some errors. I swapped cables some more but it still says "not installed". So can I replace the 8TB drive with 18TB drive then rebuild the 18TB drive? Or do I have to pass "read check" and a "parity check" first? I am unable to get Parity check to show as an option.

Disk 4 is the only one with problems, so I assume if a disk was unassigned, it was disk 4.

This happened in the middle of a parity check today, at the same time I was downloading a lot. Got hot disk reports (52C). so i cleaned the PCs dust filters and vacuumed a little inside the case. Then Disk 4 became "not installed" and it stays that way. I tried stopping and starting the array, and different power and sata cables, and it stays this way. If I go to "Maintenance Mode" it also stays as "not installed". Does that mean I cannot do a check and repair disk? Do I need to replace the disk? If I have to replace it, can I replace with a bigger drive? Diagnostics attached. I wanted to continue the parity check, but it only allows me to do a read check. Parity check does not sho0w up as a choice. So I am running a read check now. tower-diagnostics-20230629-1913.zip