Using history of unaligned writes to cache data and avoid read-modify-writes in a non-volatile storage device

摘要

Systems, methods and/or devices are used to enable using history of unaligned writes to cache data and avoid read-modify-writes in a non-volatile storage device. In one aspect, the method includes (1) receiving a plurality of input/output (I/O) requests including read requests and write requests to be performed in a plurality of regions in a logical address space of a host, and (2) performing one or more operations for each region of the plurality of regions in the logical address space of the host, including (a) determining whether the region has a history of unaligned write requests during a predetermined time period, and (b) if so: (i) determining one or more sub-regions within the region that are accessed more than a predetermined threshold number of times during the predetermined time period, and (ii) caching data from the determined one or more sub-regions.