HGST Ultrastar 7K4000 HUS724040ALA640 (0F14688) 4TB 64MB 7200RPM SATA 6Gb/s 3.5in Internal Enterprise Hard Drive (Renewed)

Purchase 4-4tb for my old prolient server. 3 of the drives had low power on count but 8+ years on the run time. No errors detected on crystaldisk so I figure we are good. No load clacking or anything. 4th HDD had a higher power on time but only about 3 years of powered on. It clicked and clacked more then the other HDDs but nothing too noisy or alarming. It had 2 reallocated sectors and 5 pending sectors. I figured on a 1+0 raid I could roll the dice and see how long it lasted. 2 weeks later the 4th hdd stopped working on my hard raid. Swapped it out with another 4tb and contacted the seller through Amazon. They asked for the S/N of the drive. Once provided they instructed me to go through the Amazon return process and they would send a replacement. Got the replacement in less then a week of sending the broken HDD back. New HDD was in great shape. Pro's: Cheap! Packaging was great. Seller is responsive and honors return policy. Con's: Old drives they will fail.

Picked up 4 of these for my (internal) mac pro (mid-2012) RAID adapter. After two months: So Far, So Good! Albeit, for drives that were initially manufactured 2013 they are 'Noisy under Seek'. But that's to be expected. And frequently run at approx 135-140 F degrees I previously had WD Black 2TB HDD arrayed, these HGST are def a step down in PERFORMANCE: like approx 305 MB/s less; My NewerTech MAXPower 6G RAID adapter can achieve data transfer speeds up to 500MB/s. But 6TB (RAID 5) doesn't go as far as it use to and I need the (internal) space now. So all finished video projects are archived on this new 12TB RAID 5 array. Editing native 1440p media files off the HGST HDDs isn't impossible, when necessary, but not preferred. But I rarely ever edit of those internal drives since we constantly suitcase (transfer) media files on the go and edit via USB3.1 or TB2 adapter I wouldn't recommend these for ur Priority Back-up (Yes, I have another +12TB NAS on-site), but if configuring on Economy budget, then absolutely be sure to invest in 1 [one] additional HDD at point of purchase, for when, or if, one of these 4TB IT-refub HDDs fails, i.e. RAID 5 degrade. Kinda defeats purpose of investing w 5yr Warranty Seller, but is still cheaper than the alternative. MAIN tasks: - archival - 143 - 150 MB/s Read/Write - NON-boot os or main partition

Purchased these drives multiple times from various vendors. They last for years and never give me any issues. I will continue to use these drives for years to come.

Mid life HGST disc for a NAS. First disc failed after being formatted. Back it went. Replacement formatted and works OK. Only buy used discs that Amazon delivers and certifies. Then if it fails you have a simple means of returning it for replacement. Always format it for your computer and write files to it filling it up completely. For a NAS rebuild the array and make certain it is not degraded. When buying used discs always use a program like Drive DX to evaluate the SMART data. HGST brand discs do give a long life. I have several bought new with that have accumulated 50,000 hours. Still are quiet, give no problems and pass DriveDX checking with 50%+ life remaining.

I purchased this drive because it was relatively inexpensive and the seller, DBSKY, was highly rated (99%). First, this drive is relatively slow. It is running just over half the speed of an MDD drive (renewed) that I purchase at the same time as this drive (per CrystalDiskMark). CrytalDiskInfo says 0 power on hours. This means that these parameters were reset so there is no way to determine how many actual power on hours this drive had. I then ran DiskGenius and it found 5 Damaged cylinders, 5 Severe and 11 Poor. This was supposed to be a fully functional drive but is obviously defective.

Drives cam well packaged and they worked well. Shipping was on time. No complaints,

Works fine. It is not as loud as some reviewers mentioned. It spins. It is a hard drive. It holds as much as it is listed to hold. All good. Only time will tell if it was worth buying, but so far so good.

It's certainly not the most silent hard drive, but it seems to write and read consistently even when hitting high temperatures in my nas box. It's probably designed for server use where airflow is not a problem, but even with my use case, it has performed, stayed reasonably quiet, and hasn't showed any signs of failure or thermal throttling. The seller even includes installation guides for Windows and MacOS which wasn't personally helpful to me, but to the next person, this could be the difference between a two and a five star... (2-Week update: has started to make grinding/chopping noise. Hasnt affected read or write speed but it does have me concerned for the long term health of this drive...)