Method for efficient write operations on a data carrier with overlapping data tracks and device thereof

摘要

A method and a device for efficient write operations are disclosed, which may be used in connection with shingled magnetic recording (SMR) in order to reduce write amplification (read-modify-write). The tracks on at least one data carrier surface are grouped into bands, and the address space of logical block addresses is divided into address subsets. Each of these address subsets is permanently assigned to a dedicated selection of tracks derived from all bands. Depending on the embodiment, the dedicated selection of tracks may be chosen in such a way that no write amplification occurs in a first phase and/or that recent data or newly added data can be altered without necessitating read-modify-write.

主权项

1. A method for storing data on at least one data carrier surface of a storage device configured for overlapping data tracks, comprising:
a) establishing a substantially immutable relation between a plurality of logical block addresses and physical locations on a plurality of tracks, said tracks being grouped into a plurality of bands, b) dividing the address space of said logical block addresses into at least two address subsets, c) assigning each address subset permanently to a dedicated selection of tracks of each band, said dedicated selection of tracks comprising substantially at least one track per band and encompassing all bands of said plurality of bands.