View source for US Patent Application 18168384. STORAGE DEVICE, STORAGE CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING STORAGE CONTROL PROGRAM simplified abstract

=STORAGE DEVICE, STORAGE CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING STORAGE CONTROL PROGRAM=


==Organization Name==

[[:Category:Fujitsu Limited|Fujitsu Limited]]


[[Category:Fujitsu Limited]]

==Inventor(s)==

[[:Category:Keima Abe of Kawasaki (JP)|Keima Abe of Kawasaki (JP)]][[Category:Keima Abe of Kawasaki (JP)]]

[[:Category:Hidejirou Daikokuya of Kawasaki (JP)|Hidejirou Daikokuya of Kawasaki (JP)]][[Category:Hidejirou Daikokuya of Kawasaki (JP)]]

==STORAGE DEVICE, STORAGE CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING STORAGE CONTROL PROGRAM - A simplified explanation of the abstract==


This abstract first appeared for US patent application 18168384 titled 'STORAGE DEVICE, STORAGE CONTROL METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING STORAGE CONTROL PROGRAM

==Simplified Explanation==

- The patent application describes a storage device that includes a storage with two pool areas and a controller.
- The first pool area is divided into units called first chunks of a certain size, while the second pool area is divided into units called second chunks of a smaller size.
- The controller keeps track of the number of first divided areas in which data is stored, based on the second size division of a virtual volume that only has the first chunk allocated to data storage.
- If the ratio of the first count value to the number of first chunks allocated to the virtual volume is equal to or less than a certain threshold, the controller allocates the second chunk instead of the first chunk to the virtual volume.


==Original Abstract Submitted==

A storage device comprising a storage including a first pool area providing a physical area in units of first chunks of first size, and a second pool area providing a physical area in units of second chunks of second size smaller than the first size, and a controller. The controller counts a first count value indicating a number of first divided areas in which data is stored from among a plurality of the first divided areas obtained by dividing, by the second size, a virtual volume that has the first chunk allocated only to an area in which data is stored. In a case where a ratio of the first count value to a number of the first chunks allocated to the virtual volume is equal to or less than a first threshold, allocate the second chunk instead of the first chunk to the virtual volume.



[[Category:G06F3/06]]