System and method of conducting in-place write operations in a shingled magnetic recording (SMR) drive

摘要

A system and method is described that allows random write operations regions utilizing shingled magnetic recording. The method includes receiving a request to re-write a logical block address (LBA) with new data, wherein the LBA is mapped to a physical block address (PBA) on a storage medium. The method further includes determining whether the data is eligible for a write-in place update wherein the data is written to an area of the I-region that has previously been written with shingled data tracks, wherein the eligibility determination is based on a mapping list of LBAs to PBAs. The method also includes writing the new data to the area of the I-region determined to be eligible for a write-in place update, wherein writing the new data further includes writing management information to the I-region that identifies a starting LBA of the write-in place update, and a length of the write-in place update.

主权项

1. A method of randomly writing data to a storage device that includes E-regions and I-regions, wherein data written to at least the I-region is written utilizing a shingled magnetic recording scheme, the method comprising:
receiving a request to write data to a logical block address (LBA), wherein the LBA is mapped to a physical block address (PBA) on a storage medium of the storage device; determining whether the data is eligible for a write-in place update to an area of the I-region, wherein initial eligibility of write-in place updates is based on a mapping list of LBAs to PBAs; and writing the data to the area of the I-region determined to be eligible for a write-in place update, wherein writing the data further includes writing management information to the I-region that identifies a starting LBA of the write-in place update and a length of the write-in place update.