Hard drive ports (2 not working and 2 are working). I have an hp 820 desktop workstation.

[TurabAliKhan]

Hi. I have an hp z820 workstation. When i connect my hdd and ssd to top 2 ports/hdd bays they are detected and work but as i connect to the other ports bottom ones the disks are not detected, not even in BIOS. Help appreciated.

[DGroves]

the z820 has three different  Hard drive controllers

the 2 blue ones are standard intel 6GBps ports, no drives needed, all os's will include the necessary driver

the 5 white ports next to the blue ports are Intel "SCU" SATA ports and require the Intel RSTe (enterprise) driver v4.3/4.6

however once win 10 is installed, it has builtin drivers for these ports, you only need a "F6 type driver during the initial os install. due to this i recommend you connect the optical and boot drive to the sata 6GBps ports and install the OS after install if win 7/8 download the SCU/LSI drivers

the 7 white SAS/SATA ports are connected to the motherboards onboard LSI 2308 "mustang" ROC chip

and these ports are controlled from within the z820 bios by pressing ctrl-c when prompted

again win 10 has native support for this

[TurabAliKhan]

Thankyou for your response dear. Yes I have windows 10 pro installed. i also checked if my hdd was showing in the BIOS or in disk management. but it wasnt showing. i tried to put it in the top 2 slots and it worked perfectly fine. i even installed the intel RSTe f6 type driver but it is still not showing in the bottom 2 bays. maybe my driver was wrong. 

[TurabAliKhan]

this is not my CPU but just to show which bays are working and which arent. mine is the same model.

[TurabAliKhan]

[DGroves]

1. are your drives SAS or SATA

2. if SATA then move the 4 hotswap bay connectors from the LSI ports to the "SCU" ports

currently they are connected/controlled by the onboard LSI bios

as a quick test,  look at the left side of the drive slots, note they are numbered, match the number with the tag numbers on the 4 cables and then move the 0/1 cables to ports 3/4 on the motherboard  in other words move working drives to different ports this will test if the issue is the cable if the drives work on different ports swap drive carriers

[TurabAliKhan]

Thanks dear. This drive that im trying to connect is a sata drive only for backup. And yes that is a Brilliant idea. I will do as you suggested and respond. I think we will be able to find the real issue. You are right it could be the cable because my other 2 drives (one ssd and the other hdd) also dont work on the bottom ports and this old drive works fine on the top 2 ports. Let me check and get back to you. Thanks so much for your guidance. Much appreciated. 

[DGroves]

https://www.ebay.com/itm/HP-Z820-Cable-Assembly-Hard-Drive-Pwr-SATA-Data-Mfr-P-N-647109-001/13247172...

[TurabAliKhan]

Dear i plugged the bay 1 cable into port 3 instead of port 2 (port 1 and 2 are blue rest are white) and the hdd that was previously detected in port 2 stopped showing in port 3. It means the cable is good. The white ports arent working. Cable is not the issue. Does this mean my drivers are missing? 

[TurabAliKhan]

Is it possible that white ports on my motherboard are faulty while rest of the things are working perfectly fine? Please excuse my ignorance if that came across as a silly question