Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Reexamination Certificate
2006-07-18
2006-07-18
Nguyen, T (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
C711S159000, C711S160000
Reexamination Certificate
active
07080208
ABSTRACT:
A method for data retention in a data cache and a data storage system are provided. The data storage system (100) includes a storage controller (102) with a cache (103) and a data storage means (106). The cache (103) has a first least recently used list (104) for referencing dirty data which is stored in the cache (103), and a second least recently used list (105) for clean data in the cache (103). Dirty data is destaged from the cache (103) when it reaches the tail of the first least recently used list (104) and clean data is purged from the cache (103) when it reaches the tail of the second least recently used list (105).
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Ashmore Paul
Francis Michael Huw
Nicholson Robert Bruce
Walsh Simon
Bluestone Randall J.
Harrington & Smith ,LLP
Nguyen T
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