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Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test. That’s about a half of what you might expect from a SATA SSD externally connected via USB 3.0, and about a fifth of the best NVMe SSD external drives connected via USB 3.2 Gen 2 ports. The most common use for hard drives, though, is simple file transfers. Our DiskBench test estimates transfer performance with a real-world workload that is useful for calculating how long a transfer could take. Hard drives have consistent performance and will hit their maximum sustained speed at QD1 with large enough I/O, which is illustrated in our ATTO benchmark results. This is particularly useful for showing differences in technology and capacity as drives get bigger and faster.
One of the aspects not mentioned in the above table is that the WD Red SMR drive is in the 5400 RPM class, while the other drives (including the Red Plus) are all 7200 RPM. Despite similar spindle speeds, the Red Plus firmware is optimized for a low noise profile across most capacity points. It might not win out on benchmarks, but possesses qualities that are important for some consumer use-cases. Another aspect to be kept in mind is that the WD Red line is now exclusively SMR-based, with the CMR drives moving to the WD Red Plus line. Unless the consumer is technically savvy enough to understand the pitfalls of SMR and its applicability to the desired use-case, the SMR-based WD Red line is best avoided. Hence, we do not include the WD Red lineup in our recommendatios. Pricing Matrix and Concluding Remarks There are three active vendors in the consumer hard drive space - Seagate, Toshiba, and Western Digital. Their retail offerings currently top out at 20TB, 18TB, and 22TB respectively.
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The price differential is so small that the Elements drive might only be for those who might be buying in bulk, but there are cheaper options available elsewhere. Price-wise, you’ll typically find that hard drives are less expensive than SSDs and offer quite a bit more storage capacity for a lower price. However, SSDs tend to be a lot faster than even the best hard drives because they don’t have to rely on moving parts like HDDs. The best SSDs can function up to 10 times faster than traditional hard drives. Noise Levels (3.5/5):** The BarraCuda 8TB is relatively quiet during regular operation but can produce some noise, especially when accessing data. This may not be an issue in a desktop setup but could be noticeable in a quiet environment. In considering the non-enterprise drives, we note that the 'Unrecoverable Read Errors' metric is 10x worse for the WD and Toshiba drives compared to the Seagate ones. The MTTF metric for the IronWolf Pro is slightly better than the other drives (at 1.2M vs. 1M hours). When Western Digital stopped trying to make the My Book series look like actual books, it heralded a vast improvement in aesthetics. And, the two-tone wavy/flat styling still looks good on this latest version.
Traditional hard drives have a circular disk (platter) that stores your data - as the disk spins, the read-write arm reads data on the disc or writes data to it as it spins. Solid state drives (SSDs) have no moving parts, instead using NAND (Negative-AND) flash memory - the more memory chips an SSD has, the more storage capacity. We ran several synthetic tests on the My Book 8TB connected to a USB 3.0 port (USB 3.2 Gen 1), and they all pointed towards a plateau at around 190MB/s for reading and 180MB/s for writes. The primary opposition to the My Book is the Seagate Desktop 8 TB External Hard Drive (STGY8000400), a practically identical concept from another seasoned hard drive maker.Synology has introduced 8, 12, and 16TB enterprise hard drives (rebranded Toshiba Enterprise HDDs with custom firmware), but they are meant specifically for Synology NAS units (no warranties if used in other systems) and are not part of this buyer's guide. Toshiba's MG09 18TB HDDs based on FC-MAMR are quite new in the market, and will be added in a future update to this buyer's guide The 3.5-inch form factor makes it compatible with most desktop computer configurations, ensuring easy installation and integration into my existing system. The BarraCuda ST8000DM008 also benefits from Seagate's advanced management features, such as AcuTrac technology and SeaTools diagnostic software, which further enhance its performance and ensure data integrity.
It must also be kept in mind that the Segate Exos Enterprise and WD Gold are enterprise drives meant to be used in server rooms where noise and power consumption (to a large extent) are not as important as performance. As per the Exos 16TB and 18TB Exos Enterprise product manuals, the acoustics specifications are around 28-30 dB at idle, and 32-34 dB for performance seeks. Power consumption ranges from 1.31W at standby to 9.45W for high queue-depth random writes, with idling average being around 5.26W. The numbers for WD Gold are very similar. On the other hand, a drive like WD Red Pro has idle acoustics around 20 dB for the high-capacity models, though performance seeks are around 36 dB. Unless one is buying for a datacenter storage array, it is fair to expect that the drives are going to be idle for more time than doing performance seeks in SMB or SOHO NAS units. While WD doesn't break down power consumption by access trace type, the specifications indicate power numbers between 0.6W and 6.2W - considerably lower than the Exos / Gold. Price can be a key factor (which is the reason for shifting a number of our recommendations to the Exos series), but data hoarders with multi-bay NAS units or those in a SOHO setting may prefer thte NAS to be not as noisy or consume more power than needed. Generally, you're going to get the best performance out of an M.2 NVMe SSD, followed by a SATA SSD, and then a 7,200 RPM HDD, with a 5,400 RPM HDD coming in last. That said, an HDD can offer much higher capacities, making them great for longer term storage of files you don't need to access regularly. How we tested the hard drives Mainstream hard drives of 8TB capacity generally can’t fit into a portable size, but the WD My Book is still a reasonably compact unit that houses a 3.5-inch hard disk drive (HDD). It stands upright and measures 6.7 inches tall, 1.9 inches wide, and 5.5 inches deep. You must plug it into the wall with a power adapter, so it’s not easy to tote around different places.Value (3.5/5):** In terms of cost per gigabyte, the BarraCuda 8TB offers a reasonably good value, especially for users who require a large amount of storage space. However, it's important to remember that the price of SSDs has been steadily decreasing, and if you value performance and responsiveness, you might consider investing in a smaller SSD for your primary storage and supplementing it with a secondary HDD like the BarraCuda for mass storage. It is important to be aware of the drive’s form factor, with 3.5” being the most common for the best HDDs (this is the only type we cover). If you need 2.5”, your options are more limited, especially for capacity. Otherwise, your computer case’s ability to house a certain number of 3.5” drives might be your primary limitation. With a 5400 RPM rotational speed and a spacious 256MB cache, the BarraCuda ST8000DM008 delivers reliable performance and smooth data access. This makes it a dependable choice for everyday computing tasks, media streaming, and storing large files. We also test power consumption and temperature. Power consumption will vary with drive performance, RPM, and more, and it’s important to look at four different cases: maximum power draw, average power draw, idle power draw, and workload efficiency. Power usage can add up with multiple drives. Temperature is also an important metric for hard drives, as overheating is a common cause of failure, particularly during sustained workloads.
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