Seagate BarraCuda 5 TB Internal Hard Drive HDD – 2.5 Inch SATA 6 Gb/s 5400 RPM 128 MB Cache for Computer Desktop PC (ST5000LM000)

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Toshiba platter sizes 2.5": https://rml527.blogspot.com/2010/09/hdd-platter-database-toshiba-25.html The first is our database profile, with a 67% read and 33% write workload mix primarily centered on 8K transfer sizes. WD platter sizes: https://rml527.blogspot.com/2010/10/hdd-platter-database-western-digital-35_9883.html Het volgende scherm is een waarschuwingsscherm. Lees de inhoud zorgvuldig door en selecteer Volgende als u akkoord gaat. To 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

New technology such as HAMR (Heat Assisted Magnetic Recording, Seagate) or MAMR (Microwave Assisted Magnetic Recording, WD) can be used with or without shingling. The first drives are expected in 2020, in either flavor. The portable bus-powered external hard drive market is served by all three HDD vendors - Seagate, Western Digital, and Toshiba. Seagate has been making use of SMR in the recent past for this segment. Western Digital is known for being coy about divulging the technology used inside its consumer products. It turns out that WD has also been using SMR technology since last 2016 in its external hard drives. In response to our specific query, WD officially confirmed the use of SMR platters in the hard drive inside the WD My Passport 5TB 2019 edition. 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. Our Database profile again showed the Seagate Gen3 as a strong runner-up to the Gen2 plateauing at 64 IOPS, steady to 128.WD platter sizes 2.5": https://rml527.blogspot.com/2010/10/hdd-platter-database-western-digital-25.html

SMR allows vendors to offer higher capacity without the need to fundamentally change the underlying recording technology. With any laptop drive, power consumption is an important factor for users. The key sources of power draw get narrowed down to either the bright screen or the storage device used. In the next test, we record the average power consumed over a small range of synthetic benchmarks. For reference, Seagate lists an average idle power rate of 0.9 watts and an active seek rate of 2.5 watts. Along with the change in nomenclature, Seagate implemented several platform changes to the SSHD Gen3 as well. While Gen2 provided users with 8GB SLC NAND, the Gen3 switched to 8GB MLC NAND. This modification does sacrifice some endurance, but the majority of users won’t deplete the endurance for the lifetime of the drive’s warranty making it mostly a non-issue. By switching to MLC NAND, Seagate is also able to reduce the Gen3 production cost greatly and thus lower the price significantly. Seagate has also decided to streamline their laptop drive production by exclusively offering 5,400 RPM drives. So while the Gen2 had a 7,200 RPM drive, the Gen3 spins at 5,400 RPM. Thanks to improvements in the cache technology, the cache miss pain of hitting the slower spinning drive should be mitigated, but regardless, hitting the drive without flash assistance is going to hurt a little more than in the Gen2 drive.

BarraCuda — Seagate's drive-reliability data simply speaks for itself, and the BarraCuda family is often recognised by leading publications and customers Voer SeagateFirmwareUpdate_SeaFlash_Dell_Kahuna_UUU_FDL_KernelV4.7_New_Config_09-28-2016_13-54-18.exe uit als beheerder. Seagate data sheet for DM-SMR Archive drives: https://www.seagate.com/www-content...dd/en-us/docs/archive-hdd-dS1834-3-1411us.pdf The table below presents the detailed specifications and miscellaneous aspects of the 2019 WD My Passport 5TB and how they compare against similar external drives currently in the market. 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.

In the File Server profile, the Seagate Gen3 offered substantially better performance than all of the competition from 8-64 IOPS at 3x-5x. However, at 128 IOPS, the Gen2 was tops. p) Manylogs concept, platters would need SMR and CMR sides: 2016, IEEE, https://ieeexplore.ieee.org/document/7897075 The SSHD serves to satiate the demand of users looking to couple performance gains and storage capacity without breaking the bank – think gamers and media enthusiasts. However, SSHD technology is not a cure-all, which Seagate readily admits; users craving extreme performance will likely desire more than an SSHD provides. Yet, for the market of HDD users Seagate is focused on, the Seagate SSHDs offer users improved performance at a lower price than SSDs. 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. 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.Cost-conscious consumers with bulk storage requirements need to rely on hard drives. On the portable front, HDD vendors have been using 2.5" drives in external bus-powered enclosures to serve the market. Seagate was the first vendor to put out a 5TB portable bus-powered drive, and Western Digital recently introduced a slew of 5TB models of their own. Similar to Seagate, Western Digital has also adopted SMR platters for their portable hard drives over the last couple of generations. Western Digital sent across a review sample of the 5TB My Passport Portable External Hard Drive recently. Introduction and Product Impressions Experience the highest capacity, and the thinnest 2.5-inch hard drive you've ever seen. Choose from 500 GB to 2 TB of massive storage for all of your application and data needs along with a slim 7 mm form factor drive that makes system upgrades very easy. 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. |WD data sheet for WD Red, note 256MB cache suggesting DM-SMR: https://documents.westerndigital.co...et-western-digital-wd-red-hdd-2879-800002.pdf