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Technology Stocks : WDC, NAND, NVM, enterprise storage systems, etc.

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From: Sam	5/10/2022 5:27:51 AM
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Western Digital spins out 10-platter drives By Chris Mellor - May 9, 2022 Western Digital is sampling conventional 22TB and shingled 26TB 10-platter disk drives to cloud service providers with mass availability scheduled for the summer. It is also introducing SSDs using the PCIe 4 bus. The key to WD’s new 22TB Ultrastar DC HC570 and 26TB DC H670 UltraSMR disk drives is its OptiNAND technology. This increases track density by using flash storage for faster access to track metadata and with the addition of a 10th platter inside the drive enclosure means a density of 2.2TB/platter. The previous 20TB Ultrastar DC HC560 also had a 2.2TB/platter density, but with nine platters. This was used in Western Digital’s Red Pro NAS drive and Gold system integrator/reseller drive. All these helium-filled drives use Western Digital’s energy-assisted PM (ePMR) and triple-stage actuator (TSA) technologies. Western Digital’s Ashley Gorakhpurwalla, EVP and GM for the HDD business unit, said: “Our intent with taking this development strategy was not only to address the capacity demands of the world’s largest cloud titans but to deliver on a roadmap that would also support the evolving economics of their data centers for decades to come. With ePMR, OptiNAND and now UltraSMR as the foundation of Western Digital’s HDD roadmap, our cloud customers can continue rapidly scaling their business by taking advantage of our innovations to lower their storage TCO.” UltraSMR crams more write tracks on a drive by overlapping them in blocks, but not overlapping the narrower read tracks. This means read speeds on these 7,200rpm nearline drives are the same as for non-shingled drives but data rewrite speeds are slower as entire blocks need to be copied, edited with new data, and then written back to the drive. This need changes to the disk IO host system software used by the customers of such drives. continues at blocksandfiles.com

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