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The Emc Corporation patent solves the following problem:
Host processor systems may store and retrieve data using storage devices containing a plurality of host interface units (host adapters), disk drives, and disk interface units (disk adapters ). Such storage devices are given, for example, by EMC Corporation of Hopkinton, Mass. And disclosed in US Pat. No. 5,206,939 to Yanai et al., US Pat. No. 5,778,394 Galtzur et al., US Pat. No. 5,845,147 Vishlitzky et al., US Pat. No. 5,857,208 Ofek, incorporated here by reference. The host systems access the storage device through a plurality of channels it provides. Host systems provide data and access control information through these sources to keep the storage device and the device data to the host system through the canal. The host systems do not meet the disk drive storage device directly, but rather, access to the host system as a plural logical volumes. Different sections of the logical volume may or may not be equal to the actual disk drive.
Our analysis of this patent is as follows:
Emc Corporation’s patent US 9323655 B1 deals with Location of data among storage tiers.
Managing data in a storage system having a plurality of storage classes included in determining an amount of data provided by at least one of the classes of storage according to a policy, actively make a doors, according to the amount of data provided by at least one of the classes or an expected performance based on the threshold, and put the data on specific classes of storage based on threshold. Dynamically create a door may include sorting the data by at least one score, and may include determining a particular score is equal to the amount of data provided. The data portion will be given a histogram with a horizontal scale equivalent to a price score and a vertical scale corresponds to a number of pieces of data with a particular value.
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