Patent
Power management architecture for a reconfigurable write-back cache
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TLDR
In this paper, a power monitoring device places a write-back cache memory into a writethrough mode upon detection of a low-battery condition or a user request, which can save significant power during typical portable computer operations.Abstract:
A computer system having a power monitoring device places a write-back cache memory into a write-through mode upon detection of a low-battery condition or a user request. Under write-through mode, the cache memory need not be flushed every time a suspend mode of the computer system is entered. Thus significant power is saved during typical portable computer operations.read more
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Disk drive with nonvolatile memory having multiple modes of operation
TL;DR: A hybrid disk drive as discussed by the authors is a disk drive with two types of permanent storage media (conventional disk media and nonvolatile memory, such as flash memory), which uses its NVRAM in operational modes other than the power-save or "standby" mode wherein the disks are spun down.
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Gregory Bakker,Khaled A. El-Ayat,Theodore Speers,Limin Zhu,Brian Schubert,Rabindranath Balasubramanian,Kurt Kolkind,Thomas F. Barraza,Venkatesh Narayanan,John L. McCollum,William C. Plants +10 more
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TL;DR: In this paper, the cache coherency administrator can include a display to indicate a cache co-herency status of a non-volatile cache, which can be used to check the cache's integrity.
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TL;DR: In this paper, the authors describe a mass storage system where two or more dissimilar non-volatile storage mediums have the appearance to an operating system of a single device.
References
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Patent
Shadow memory system for storing variable backup blocks in consecutive time periods
TL;DR: In this paper, a shadow memory system is proposed which is able to survive multiple fast sequence power failures and includes a volatile main memory and shadow memory subsystem which continually monitors write accesses to the main memory.
Patent
Method of operating a cache memory including determining desirability of cache ahead or cache behind based on a number of available I/O operations
TL;DR: In this article, a computer data storage device made up of both solid state storage and rotating magnetic disk storage maintains a fast response time approaching that of a solid state device for many workloads and improves on the response time of a normal magnetic disk for practically all workloads.
Patent
Method and apparatus for incorporating cache line replacement and cache write policy information into tag directories in a cache system
Roger E. Tipley,Philip C. Kelly +1 more
TL;DR: In this article, a method and apparatus for incorporating cache line replacement and cache write policy information into the tag directories in a cache system is presented, which can be generalized to caches which include a number of ways greater than two by using a pseudo-LRU algorithm and utilizing group select bits in each way to distinguish between least recently used groups.
Patent
Two-level cache memory system
TL;DR: A two-level cache memory system for use in a computer system including two primary cache memories, one for storing instructions and the other for storing data, is described in this article.
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Information recording and reproducing apparatus including both data and work optical disk drives for restoring data and commands after a malfunction
Isao Sato,Yoshihisa Fukushima +1 more
TL;DR: In this article, an information recording and reproducing apparatus is coupled to a host device such as a central processing unit (CPU) through an optical disk control unit for controlling recording and reproduction of the data.