| 摘要 |
A novel symmetrical band is disclosed, which may be used in connection with shingled magnetic recording (SMR) in order to reduce write amplification (read-modify-write). Depending on the embodiment, overlapping data tracks diverge from, or converge to the center of each symmetrical band. Associated guard regions may be located at the center, or at the band boundaries, and are shared such that the excess width of a write element is caught by the guard regions from both sides. A symmetrical band may reduce the maximum write amplification by more than half. A hard disk controller may maintain the number of taken or empty tracks on both sides of each symmetrical band substantially equal at every fill level. |
