Question Hard Drive disappearance ?

[Kisianik]

Hello
I have an old, about 10 years, PC, no upgrade yet, please do not even suggest. 4790K, GTX 970, 850W EVGA PSU.
Now Drives. Win 8.1 on Samsung 850 PRO 500GB SSD and just installed Win10 on Samsung 870 EVO 2TB SSD, also WD RED PRO 12TB x2, Seagate EXOS x16 16TB, WD GOLD 2TB+8TB+10TB. I had this setup without 870 EVO for about 6-8years and no problems on Win 8.1.
Due to some game (Ubisoft Far Cry 5 and 6) requirements for WIn10 I decided to upgrade to enjoy until Win10 is no more.
Here comes the WEIRD issue/problem.

My PC case has 6 HDD slots and 2 SSD slots (Motherboard with 8 SATAs). Each PSU power cable has 3 connectors. The one I connected EVO is also provides power to 850 PRO and DVD Drive. Once I attached 870 EVO to power only, without SATA cable and booted up, one WD RED PRO disappeared. I pulled it out and placed in external HDD enclosure - working like a charm, no issues. Put it back, and NOTHING. Even BIOS doesn't see it.. Power cable for this HDD is also feeds 2 other hard drives, which are working perfectly.
What could it be?

Any ideas/suggestions appreciated

 

[Lutfij]

850W EVGA PSU
EVGA is the brand of the unit, while 850W is the advertised wattage of the unit. What is the model of the unit and it's age?

What is the make and model of your motherboard? What BIOS version are you currently on for your motherboard?

 

[Misgar]

Once I attached 870 EVO to power only, without SATA cable and booted up, one WD RED PRO disappeared. I pulled it out and placed in external HDD enclosure - working like a charm, no issues. Put it back, and NOTHING. Even BIOS doesn't see it.. Power cable for this HDD is also feeds 2 other hard drives, which are working perfectly.

It's not entirely clear if all three SATA power connectors on that lead are still working. Have you tried fitting the hard disk to the other two SATA power outlets on the same 3-way lead, or is it some strange interaction between the WD Red Pro and the 870EVO?

Alternatively, do any of your NAS/RAID/Enterprise-class drives need the 3.3V pin 3 mod to enable them? Seems unlikely if they worked in the past, but you may have rearranged the hard disks and used different SATA power connectors. Masking off pin 3 on the SATA/SAS data connector is often known as the "Kapton tape mod".

https://www.instructables.com/How-to-Fix-the-33V-Pin-Issue-in-White-Label-Disks-/

https://forums.unraid.net/topic/84038-so-your-new-sas-or-sata-drive-wont-start-spin-up/