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
Inventor(s)
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.
