DISK DRIVE APPARATUS, AND METHOD FOR STORING TABLE FOR MANAGING DATA IN NONVOLATILE SEMICONDUCTOR MEMORY IN DISK DRIVE APPARATUS

摘要

PROBLEM TO BE SOLVED: To suppress an influence when storing a segment table on processing in a host. SOLUTION: An HDD 1 creates a segment table in which addresses of user data in a flash memory 25 are associated with LBAs of a magnetic disk 11. The HDD 1 updates a segment table 243 in a DRAM 24, and stores it in the flash memory 25 at a predetermined timing. The HDD 1 creates a journal indicating an update on the segment table 243, and stores the journal in the flash memory 25. A latest segment table can be recovered from a segment table 253 and the journal in the flash memory 25. On receiving a predetermined command from the host, the HDD 1 saves the segment table 243 in the DRAM 24 to the flash memory 25. COPYRIGHT: (C)2009,JPO&INPIT