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HDDs are still the mainstay of the enterprise world for data storage on network Attached storage, block storage and bulk storage of data, object storage was essentially designed for HDDs...HDD lifecycles tend to be between 4 to 5 years
The DS8880 has 2 types of storage arrays, The HPFE Gen2 Flash arrays and the HDD spinning drive arrays
In the storage industry, HDDs started rapid demonstration to market cycles around 2000...HDD is working on 24TB per unit demonstrations that are 5 years forward looking
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I ibm-cloud ibm-cloud-object-storage ibm-support icos instance installation interoperability interactive io-group iops iot ip-replication isc iser iscsi isp isv4pc J K L latency license Licensed Machine Code ( LMC ) linux lfts LMC M Managed disk ( mdisk ) metadata mib monitoring multipath N nvme nvme-of Nearline SAS HDD ( nl-sas-hdd ) O offering on-premise oracle P performance-simulation product-logo proxy putty Q qos R raw-capacity rdbms rdma recommended-version remote-copy remote-support-assistance RESTful rhel7 roce rpo rsa rto #tags #taxonomy
There are 4 NVMe disk drives and 4 HDD disk drives attached in each node. These NVMe disk drive and HDD disk drive are considered as physical disk (PDISK) in Storage Scale ECE. When Storage Scale ECE creates recovery group in these storage nodes, it identifies NVMe disk drive and HDD disk drive as different disk type, and put them into different Disk Array (DA). As shown in above example, DA1 has been created for all NVMe disk drives and DA2 has been created for all HDD disk drives. If disk has different characteristic, such as capacity, performance (e.g RPM for HDD), and so on, Storage Scale ECE will put them into different Disk Array as well. For example, if there are two type of HDD with different capacity, 8TiB and 12TiB, in these storage node, Storage Scale ECE will put all 8TiB HDD into a Disk Array, and put 12TiB HDD into another Disk Array
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SSD is 10-15 times more expensive than spinning hard disk drives (HDD), and this price difference is expected to continue for a while...In 4Q09, manufacturers will manufacturer 50 Exabytes of HDD, but only 2 Exabytes of SSD
There are only 3 commercially available and viable storage technologies Flash (in several incantations), HDD and Tape. The strengths and weaknesses of each technology combined with the cost of the technology in deployment are initial considerations to deployment. Tape is not in competition with HDD and HDD is not in competition with SSD. SSDs provide performance and reliability in transactional operations, at a higher cost than equivocal capacity to HDD. Although HDD can meet the performance level of some SSD it requires an order of magnitude in HDDs to get the same transactional performance. HDDs thrive in storing active data that is read, recalled, and optimized for random retrievals