My old venerable TS-879 PRO firmware version 4.3.2805 has recently started “acting up” when booting from a cold start. The machine is oddly configured, because I want it that way currently, with three disks (a 28TB, an 18TB and a 14TB) in three single disk static “arrays”.
When I first press the power button, the unit acts as though it’s going to boot and within ten or 15 seconds, the system “hard crashes” to a power off condition and then in a few seconds will power back up and continue the normal boot process. This now happens each and every time the unit is turned on from a cold start.
It’s never failed to boot but does any have any idea where to look to resolve this issue?
Thanks much!
Any warnings/info shown on the VGA/HDMI port ?
No monitor hooked up at the present time. I’ll consider doing that in the near future.
I am not sure why, but the start up issue was resolved when I set the EuP Mode Configuration in the power settings to “disable”.
As you mentioned, this device has been in use for quite some time. For the safety of your data, please also make sure to keep good backups!
Roger that. Incidentally, this particular TS-879 has been “hotrodded” with a processor upgrade to an Intel i7-2600K CPU @3.4GHz (4 cores, 8 threads) and 16GB of memory plus a dedicated cooling solution fhe processor.
First suggestion is usually to put everything back to factory equipment… 
What’s the fun it that? Have a good day!
It sounds like a failing PSU to me. The initial cold start gets some or all of the drives spinning (highest load on the PSU), then fails, only to restart fast enough that the drives are not a cold start as they are already spinning. Lower power demand on the second startup.
Makes quite a bit of sense. Assessing the power supply’s health may be a challenge as I don’t have a known good spare to swap to. There are currently three mechanical disks and an SSD (system) installed so I suppose I could disconnect the three mechanical drives and try a series of power on / power off cycles and assess how it starts then fully populate all seven bays and do the same.
I have a TS-870 pro with n intel 3770t and 16gb ram as well. I looked into a replacement PSU a couple of years ago and found one available for around $180. I decided to upgrade to a new NAS instead, but i see one on ebay for $124 if your testing shows it might be the PSU.
https://www.ebay.com/itm/157290877249
Thanks for the info. I’ll keep an eye peeled on eBay in case I need one. Yes, I also purchased replacements along the way but I just hate to throw stuff out even if it is beyond EOL.
(As an afterthought, I have a spare good ATX power supply and, if the pin out on the connectors is compatible, I could possibly breadboard/jury rig in to replace the 250w internal PS on a test basis.)