SSHDs utilize Seagate flash management technology to deliver SSD-like performance. Testing consistently shows that Seagate Laptop SSHDs compare favorably to SSDs without sacrificing capacity. Solid state hard drives fuse the strength of SSD and HDD into one affordable and powerful device—a smart way to maximize every dollar you invest in your PC or MAC.

SATA 2.5 Product Manual - Seagate

Thinnest and lightest 2.5-inch hard drive with up to 2TB storage in a 7mm z-height, providing seamless upgrades of thin and light laptops and smaller form factor systems. SMR allows vendors to offer higher capacity without the need to fundamentally change the underlying recording technology. The new SSHD Gen3 line also gets a naming convention update. The first generation hybrids were called Momentus XT, while the second generation models were called Momentus XT with Fast Factor. Now, Seagate has dropped Momentus family branding altogether, opting instead for the simpler category name of SSHD. To help clarify drive generations, StorageReview will reference the drives on a go-forward basis with the SSHD generation number to help clarify the chronology for consumers (Gen1, Gen2, Gen3).Similar to the previous iterations in the bus-powered My Passport line, the 2019 My Passport 5TB also uses a 5400 RPM drive internally. Based on WD's naming convention for internal drives, it can be seen that the WD50NDZW corresponds to a 5TB 2.5" drive with a 15mm z-height. It has SED (hardware encryption) capabilities. The 5400 RPM disk has a 128MB cache and the board has an integrated USB 3.0 bridge chip leading to a Micro-B interface.

List of known SMR drives | TrueNAS Community List of known SMR drives | TrueNAS Community

Up to 5TB capacity and both 7mm and 15mm form factors suitable for a variety of compute applications. Large capacity portable hard drives have reached a plateau. There’s not much hardware improvement that can be made as there is little to no incentive to invest in R&D. New technologies like HAMR or Helium are reserved for more lucrative markets like data centers where the need for smaller 2.5-inch hard disk drives is, well, non-existent. Seagate has formally introduced a new family of hard drives in the 2.5” form-factor. It is designed for laptops as well as external storage solutions. The new BarraCuda HDDs are based on 1 TB shingled magnetic recording platters and Seagate’s multi-tier caching technology. They enhance the maximum capacity of the company’s 2.5” HDDs to 5 TB - making the BarraCudaST5000LM000 the world’s highest-capacity 2.5” hard drive. HGST Host-Managed SMR DataCenter drives: https://www.westerndigital.com/products/data-center-drives/ultrastar-dc-hc600-series-hddFor the average consumer, trying to translate random 4K write speeds into an everyday situation is pretty difficult. It helps when comparing drives in every setting possible, but it doesn’t exactly work out into faster everyday usage or better game loading times. For this reason we turned to our StorageMark 2010 traces, which include HTPC, Productivity, and Gaming traces to help readers find out how a drive might rank under their conditions. The next profile looks at a file server, with 80% read and 20% write workload spread out over multiple transfer sizes ranging from 512-byte to 64KB. Looking from the front you can see the standard SATA power and data interface, as well as admire the thin 7mm form-factor. This design allows it to fit in more systems, including ultrathin notebooks.

Seagate 5TB Barracuda Sata 6GB/s 128MB Cache 2.5-Inch 15mm Seagate 5TB Barracuda Sata 6GB/s 128MB Cache 2.5-Inch 15mm

l) OpenZFS Office Hour discussion on SMR: 2015, SMR, Resilvering, Possible Solutions at around 20, 31 and 46 mins respectively, https://youtu.be/mS4bfbEq46I?t=1220 Seagate’s 500GB SSHD Thin drive at 7mm is a wallet-friendly alternative for users seeking new technology that provides low-power consumption, serious performance gains over conventional HDDs when in cache, and overall solid value per gigabyte. url=https://hdd.userbenchmark.com/SpeedTest/9154/ST500LM000-SSHD-8GB]Userbenchmark: Seagate ST500LM000-SSHD-8GB 500GB[/url] When it comes to measuring performance of the Seagate SSHD Thin the two categories of benchmarks that we commonly test all consumer HDDs and SSDs on show strengths in different areas. Our synthetic benchmarks are geared at showing the performance of the drive in an uncached “worst case” scenario, while our real-world traces allow the drive to cache data and better show how the drive would perform during repetitive day-to-day activities. Since the SSHD is really geared towards those workloads, we put more weight on than in this review than we would normally do for traditional HDDs or SSDs.

Another 5TB external HDD lands in a very crowded market; will it struggle without a clear price advantage?

Seagate datasheet for 8TB Archive v2 showing HA-SMR: https://www.seagate.com/www-content...seagate-archive-hdd/en-us/docs/100795782a.pdf j) BPR is so complex no new features can be added afterwards: 2020, BSD Now podcast, from roughly 22:00, https://www.bsdnow.tv/340 All 2-6TB external drives - Elements, My Book, Easystore, etc. Precise models vary and are not guaranteed; assume SMR in capacities below 8TB. ganeshts - Friday, October 21, 2016 - link Manual will be shortly updated - We have confirmation from Seagate that these are SMR drives.

TechRadar Seagate Ultra Touch 5TB external HDD Review | TechRadar

Seagate Adaptive Memory™ technology effectively identifies the most frequently-used data in your computer. This data is stored in the ultra-fast NAND flash memory which results in blazing fast boot times, and a super responsive experience where you wait less and do more. This technology is constantly working and adapting to way you work and access information. The Ultra Touch is likely to struggle against other Seagate models with a similar capacity but much lower price points, especially as they will perform similarly given that they use the same hard drive. Yes, it does offer a number of bundled services and gets extra points for its sustainable messaging, but if you’re just after storage and nothing else, it’s hard to justify a 40% premium over its cheaper siblings. q) Toshiba presentation on SMR technology: 2015, https://www.toshiba.co.jp/tech/review/en/01_02/pdf/a08.pdf p) Manylogs concept, platters would need SMR and CMR sides: 2016, IEEE, https://ieeexplore.ieee.org/document/7897075To a large extent, Seagate’s multi-tier cache determines the performance of the company’s BarraCuda 2.5" and Mobile HDD drives. For example, when Seagate announced its Mobile HDD products earlier this year, the company declared maximum sustainable transfer rate of the HDD at 100 MB/s. However, the documentation was altered later in the summer to reflect a maximum transfer rate of 140 MB/s (possibly due to updated firmware, or a change in the performance measurement method). Now, the high-capacity BarraCuda 2.5” (3 TB, 4 TB and 5 TB) drives are rated for 130 MB/s, while the mainstream BarraCuda 2.5” (500 GB, 1 TB and 2 TB) are rated for 140 MB/s. This is still below the 145 – 169 MB/s offered by PMR-based Laptop HDDs from the company. Seagate BarraCuda 2.5" HDDs Drive Managed, DM-SMR, which is opaque to the OS. This means ZFS cannot "target" writes, and is the worst type for ZFS use. As a rule of thumb, avoid DM-SMR drives, unless you have a specific use case where the increased resilver time (a week or longer) is acceptable, and you know the drive will function for ZFS during resilver. See (h) For 2MB random transfer, the Seagate Gen3 came out at 73.5MB/s and 86.6MB/s, placing second only behind the Seagate Gen2. Rounding out the figures, in our Workstation profile, the Gen3 placed a solid second, again to the Gen2. The Gen3 plateaued at 64 IOPS and had a minor decrease at 128 IOPS. Though there are some key updates from the Gen2 Momentus XT, there are many similarities. Like the Momentus XT, the Seagate SSHD 500GB Gen3 interfaces over high-speed SATA 6GB/s. It also still comes with 8GB of NAND flash, which keeps the price low but, at 8GB, hinders the hybrid from even greater performance.