System and methods for mitigating write emulation on a disk device using cache memory

A non-transitory computer readable medium having instructions stored thereon when executed by a processor, process write requests, the non-transitory computer readable medium comprising instructions for:

• receiving, at a storage system comprising a cache device, a write request comprising write data for storing to a disk device, the write data formatted in a first sector size and comprising at least one write data block comprising the first sector size, the disk device comprising a plurality of sectors formatted in a second sector size, the second sector size being larger than the first sector size, each sector storing a plurality of data blocks comprising the first sector size;
• determining at least one corresponding sector on the disk device, the at least one write data block to be stored to the at least one corresponding sector on the disk device;
• determining that the cache device stores a corresponding set of data blocks corresponding to the at least one corresponding sector, the corresponding set of data blocks being stored to the at least one corresponding sector on the disk device, the corresponding set of data blocks comprising at least one corresponding data block and at least one additional data block, each corresponding data block corresponding to a write data block;
• and
• replacing each corresponding data block with a corresponding write data block in the corresponding set of data blocks to produce a modified corresponding set of data blocks comprising at least one write data block and at least one additional data block;
• and
• sending a modified write request to the disk device, the modified write request comprising the modified corresponding set of data blocks.

A system comprising:

• a storage system comprising a processor and a cache device, the storage system configured for:
• receiving a write request comprising write data for storing to a disk device, the write data formatted in a first sector size and comprising at least one write data block comprising the first sector size, each write data block comprising a storage address formatted in the first sector size, the disk device comprising a plurality of sectors formatted in a second sector size, the second sector size being larger than the first sector size, each sector storing a plurality of data blocks comprising the first sector size;
• determining at least one corresponding sector on the disk device, the at least one write data block to be stored to the at least one corresponding sector on the disk device;
• determining a corresponding set of storage addresses, formatted in the first sector size, corresponding to the at least one corresponding sector, the corresponding set of storage addresses comprising at least one corresponding storage address and at least one additional storage address, each corresponding storage address being equal to a storage address of a write data block;
• and
• determining that the cache device stores at least one additional data block comprising an additional storage address;
• and
• sending a modified write request to the disk device, the modified write request comprising the at least one write data block and the at least one additional data block.

A non-transitory computer readable medium having instructions stored thereon when executed by a processor, process write requests, the non-transitory computer readable medium comprising instructions for:

• receiving, at a storage system comprising a cache device, a write request comprising write data for storing to a disk device, the write data formatted in a first sector size and comprising at least one write data block comprising the first sector size, each write data block comprising a storage address formatted in the first sector size, the disk device comprising a plurality of sectors formatted in a second sector size, the second sector size being larger than the first sector size, each sector storing a plurality of data blocks comprising the first sector size;
• determining at least one corresponding sector on the disk device, the at least one write data block to be stored to the at least one corresponding sector on the disk device;
• determining a corresponding set of storage addresses, formatted in the first sector size, corresponding to the at least one corresponding sector, the corresponding set of storage addresses comprising at least one corresponding storage address and at least one additional storage address, each corresponding storage address being equal to a storage address of a write data block;
• and
• determining that the cache device stores at least one additional data block comprising an additional storage address;
• and
• sending a modified write request to the disk device, the modified write request comprising the at least one write data block and the at least one additional data block.