HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5-Inch Helium Data Center Internal Hard Disk Drive

Been a fan of the Ultrastar drives since before Western Digital bought Hitachi's drive business. HGST/Hitachi drives are consistently rated the best in the annual drive analysis report that Backblaze releases.Been using Hitachi drives for many years in a large enterprise environment with thousands of drives in a high density storage cluster. Also used dozens of them at home for nearly a decade. Very few drive failures. Problem free operation for years beyond their 5 year warranty.These new helium-filled drives live up to the Ultrastar reputation. Excellent quality, reasonably quiet acoustics, and lower operating temperature than air-filled drives. They are running in the low 80 degree range installed inside 8-bay drive enclosures. The other air-filed drives in the same enclosure run at least 10 degrees warmer.These are brand new drives with a 5-year manufacturer warranty. I verified this on the HGST warranty check website.I ordered 3 drives which arrived in a box with a plastic drive suspension insert that could hold 4 drives.Very happy with product and service from 'ServerPartDeals'.

First, I'm going to fault myself. I thought I had did my research on drives before pulling the trigger. i ultimately went with the HGST brand because it was getting good reviews and the helium tech seemed like a good buy in. This would have been my first drive in my NAS that I build. I failed to notice that this has POWER-DISABLED technology. I did not know what it was until i got this delivered. I have not been able to get this to work. For those who don't know, this was introduced a few years back and requires a special motherboard in order to allow the drive to be remotely disabled or rebooted. For us mortals, there is a work around for by disabling the 3rd pin in order to allow the drive to work. I ordered some kapton tape and covered the 3rd pin. When rebooting the PC and going into bios, I am able to see the drive. I then launch into windows 10 and the drive is not found. I go into disk management, still no drive. I reboot back into bios and the drive is no longer listed. I cut power to the machine for a few minutes and boot back up and it's the same cycle. I have just now ordered the molex to sata connector which bypasses the power going to the 3rd pin (which is recommended on the HGST site). Still no luck. It has been almost two weeks and I have not been able to get this to start. Unless you have a need for a drive to be power-disabled, I would steer clear of this drive. Now I'm stuck with a $330 brick unless I can return it. Very, very frustrated.

Be aware, if you aren't familiar with how BITs to BYTES are advertised, you may be confused by the amount of disk space that shows up on your drive.This isn't the manufacturer's fault, it's just the industry standard to be slightly misleading.Expect to get 10.9 TB of usable capacity out of this drive.Otherwise the, the drive is great.It's much quieter than my experiences with some old WD black drives. You don't have to deal with that "hammer" sound from the drive writing and reading data.It's just a good, high capacity drive. There isn't any revolutionary speeds going on, but it should be noticeably slower than other HDDs.

Worked well since : "Last purchased Feb 17, 2020." Now it's dead. It served me well, but I had hoped to get longer life from it. Regardless, too many other negative reviews and those saying that they received "used" drives. As a resulte, I'll pass on this brand for its replacement.

Drives are great, got 2 12TB, works fine out of the box, works great in my Synology DS215J NAS replacing my WD Red 3TB drives.The drives are noisier than the WD Red, I can hear the heads seeking during activity, not squealing or bearing, just head movement light "knocking" noises. Not the end of the world, but the old WD Red were totally silent; I couldn't hear anything from them, so I was a bit surprised these were so noisy.Warranty is a bit sketchy. The listing did note:"Up to 2.5M hours MTBF with a 5 year limited OEM warrant direct with Authorized Reseller"I registered the drives with WD and they said the warranty was until Dec 2024 (so just less than 1 year) since the drives are sold OEM it's up to the seller to provide the warranty. We will see if the reseller "The Nekid Cow" will provide warranty service in the next 5 years if I have an issue with the drives. I would have felt more comfortable if I had the 5 year warranty with WD, but I do realize I was getting a good deal on these drives so is reasonable.They were new in boxes, good condition. I ran a full SMART test on them and all was good so I think things should be fine. I'll update the review later if there are issues.