Question "New" build, one of my older HDDs isn't being recognized

Jan 17, 2024
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Ok, so I have a question for you folks; I'm not new to the PC building hobby, but it's been a while since my last build (ok, let's be honest, over a decade 😬), and my new build is running into a particularly peculiar (to me) issue.

My "new" system build is based on a Z97/Broadwell mATX build (please don't give me any flack for that, lol), and everything has been planned out to a "T" -- all components were sourced for their ability to work properly together. Anyway, that's all to say that prior to this next bit, EVERYTHING has been functioning correctly, both on the bench, and subsequently installed -- EXCEPT -- ONE of the two HDDs that I moved over from my other PC (a 2014 HP ProDesk 600 G1 Tower with some minor upgrades).

I want to see if anyone can throw any ideas my way before I actually take the time to spec out the whole build. Basically, testing various things results in the following:

The "malfunctioning" (HGST 10TB) HDD, when plugged into both SATA power & data cables on the NEW system (all connections properly seated) fails to spin up at all; not upon power-up, and not at all during the system POST/boot process. In addition, the drive fails to show up in BIOS. Testing another similar HDD (HGST 6TB) shows no issue at all; the HDD shows correctly in BIOS, and spins up upon power-up, as expected.

Swapping data cables does not correct the issue, nor does rearranging the PSU extension cables (and yes, I'm using the original Lian Li cables that were included with the SP750 PSU) -- the 6TB drive simply gets recognized on the other port instead, and the 10TB remains unpowered/unseen, no matter what I connect, where. This applies no matter whether I fully disconnect one of the drives, or connect them both concurrently.

It does not appear to be a SATA port issue, as I'm able to get the 6TB drive to be recognized in any of the available SATA ports on the motherboard, powered by any of the PSU extension cable terminal connections. The PSU should have MORE than enough wattage to drive everything, so I'm failing to understand how the drive isn't powering on.

Here's the thing: The 10TB drive is most definitely NOT fried; I can hook it back up to my old HP (using the ancient HP PSU), and it runs exactly as expected, with all files intact, and powers on as it should. What in the heck am I missing, here? 🤔🤔🤔

Please feel free to ask any questions that may seem relevant! 😊🙏
 
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Welcome to the forums, newcomer!

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time. Would be a good idea to mention the model for your HDD's, as opposed to their makes and capacities.

Have you tried sourcing standalone SATA Dat cables to rule out the cable you're using as faulty?
 
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CPU: Intel i7-5775C

CPU cooler: InWin BR24 AIO

Motherboard: ASRock Z97M OC Formula (mATX); BIOS version 2.50 (latest)

Ram: 32GB (8GB x4) TeamGroup Vulcan 1600 10-10-10-27 1.5V (TLYD38G1600HC10ABK)

SSD/HDD:
- 1x 2TB WD Black SN850X NVMe (M.2 slot on motherboard, used the chipset)
- 4x 2TB WD Black SN850X NVMe (bootable hardware RAID10, driven by a Highpoint SSD7105 PCIE3.0 x16 card in PCIE slot 3)
- 1x 6TB HGST/HP MB6000GEQUT (refurbished); *not currently installed*
- 1x 10TB HGST Ultrastar HE10 HUH721010ALE600 (refurbished); *not currently installed, not being recognized by new system*


GPU: ASUS Dual NVIDIA GeForce RTX 3060 V2 OC Edition 12GB (PCIE slot 1)

PSU: Lian Li SP750 (brand-new; purchased about a week ago, actual shelf age of item unknown)

Chassis: JONSBO TK-1 (black)

OS: Windows 10 Professional x64

Monitor: HP EliteDisplay E222 1080p 22"

Have you tried sourcing standalone SATA Dat cables to rule out the cable you're using as faulty?

I've tried a few different SATA data cables, including the one I used to connect the 10TB drive to my other HP computer (which works correctly, when connected to that computer). They all work as expected with the 6TB HP drive, but none make a difference to the non-recognition issue on the 10TB, when attached to the new system build. Basically, I've *generally* eliminated the data cables from the list of potential causes. I'm left thinking it is a PSU issue of some sort, or the pinout on the Lian Li SATA power extensions is somehow incorrect for the HGST 10TB HE10 drive.
 
Okay, so it's DEFINITELY a power-delivery / pinout issue -- I have a completely separate 12V/5V power supply (not a full PSU, just a single 120VAC power connection with a 4-pin molex at the other end) to which I have a 4-pin molex to SATA power adapter cable attached; using this to power the drive, it spins up as expected AND is recognized when connected via SATA data cable to the SATA ports on the Z97 board.

What could be the cause of the Lian Li SP750 NOT powering the drive? There's absolutely NO way it's wattage-limited with the wattage-sipping components I have installed. Even all together. I can use the 4-pin molex to SATA power adapter cable for now (attached to the Lian Li 4-pin molex PSU cable), and will report back with results. I expect it will probably run fine, although this is not my preferred way to go, if there is something else I can do to avoid using an extra adapter. 🤔