Abstract
In current HDD design, reallocation is a remapping between logical and physical address, the reallocations are treated as LLRW error, and extra disc requests, seeks are needed to process reallocations. The reallocation count is visible through SMART which could show unhealthy status to users. Although reallocations can be cached by current data caching scheme, it is temporary, and not available if users turn off caching feature, or enabling FUA mode. In this method: The reallocated sectors are kept in a reserved cache space since power up, and to be accessed through cache nearly permanently unless # of reallocated sectors exceed cache size. As there is no user impact (neither performance nor acoustic), We do not need to count such cached reallocations in SMART, so that user will not return drives due to unhealthy state.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Walz, Randi; Qiang, Jian; Chen, Kai; Edgar, Brian; and Chen, Yu Hang, "Method of Fast Accessing Reallocated Sectors", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/10257