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Learning Ceph - Second Edition by Karan Singh, Vaibhav Bhembre, Anthony D'Atri

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RAID: the end of an era

Redundant Array of Independent Disks (RAID) has been a fundamental storage technology for the last 30 years. However, as data volume and component capacities scale dramatically, RAID-based storage systems are increasingly showing their limitations and fall short of today's and tomorrow's storage needs.

Disk technology has matured over time. Manufacturers are now producing enterprise-quality magnetic disks with immense capacities at ever lower prices. We no longer speak of 450 GB, 600 GB, or even 1 TB disks as drive capacity and performance has grown. As we write, modern enterprise drives offer up to 12 TB of storage; by the time you read these words capacities of 14 or more TB may well be available. Solid State Drives ...

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