WD 20TB Elements Desktop External Hard Drive - USB 3.0, Black
About this deal
Most such multi-bay devices are sold without the actual hard drives included, so you can install any drive you want (usually, 3.5-inch drives, but some support laptop-style 2.5-inchers). Their total storage capacities are limited only by their number of available bays and the capacities of the drives you put in them. The storage industry refers to these (as well as smaller-capacity externals as a whole) as DAS—for "direct attached storage"—to distinguish them from NAS, or network attached storage, many of which are also multi-bay devices that can take two or more drives that you supply. (See our separate roundup of the best NAS drives.) Many years of close collaboration work with our key component suppliers is leading to impactful technology breakthroughs to achieve higher capacities, which ultimately reduces total cost of ownership (TCO) of our nearline HDDs.” That's why you no longer see people experimenting by putting SSD in RAID 4 to get ridiculous speeds, like people did with SATA SSD. You simply can't do that with M.2 SSD, there's no mobo that have 6+ M.2 slots, but there's plenty of workstation solutions with many U.2 slots.
Quadruple-Level Cell (QLC): Similarly to TLC, QLC is also commonly found in consumer grade products. QLC stores 4-bits per cell and can take up to 16 levels of charge. Among the 4 variants listed, it has the highest memory density and cheapest price. However, the lower price comes at a cost in performance, reliability and endurance (up to 1K P/E). Obviously, the ultimate goal is every actuator arm being fully independent, that would be "AWESOME". That’s still not amazing compared with an unbranded NAND SSD, though it’s much better than the 75TB of workload transfer that the IronWolf Pro offers.If you want 20TB drives in an array, then this is what to expect. Western Digital UltraStar DC HC560 has the same workload numbers, so the alternatives come with the same caveat.
In addition to their physical shape differences, USB ports on the computer side will variously support USB 3.0, 3.1, or 3.2, depending on the age of the computer and how up to date its marketing materials are. You don't have to worry about the differences among these three USB specs when looking at ordinary hard drives, though. All are inter-compatible, and you won't see a speed bump from one versus the other in the hard drive world. The drive platters' own speed is the limiter, not the flavor of USB 3. The complete reading of the drive for an integrity test once a week would use up 1,040TB per year, nearly twice the yearly limit, and that’s without any operational use. Ontdek bedrijfsoplossingen voor gegevensopslag die gemaakt zijn voor betrouwbaarheid, betaalbaarheid en gebruiksgemak.Most of the damage to the NAND cells occurs during random writes in an SSD, and relatively minor wear happens when reading.