Hewlett-packard Development Company, L.p.

Brian S Bearden

Robert Matthew Sesek

David Kiyoshi Umberger

Rodger Daniels

Brian Patterson

Guillermo Navarro

Michael James Shelton

Marc Edward LeFevre

Randy Matthews

Matthew B Cooley

Tyson D Rallens

A system comprises a controller and a buffer accessible to the controller. The controller is configured to prefetch data from a storage medium in advance of such prefetch data being requested by a host device, some of such prefetch data being retrieved from the storage medium and stored in the buffer ready for access by the host device ('ready data') and a remainder of such prefetch data in process of being retrieved from the storage medium but not yet stored in the buffer ('not ready data'). The controller alters a depth of the prefetch data based on a ratio of the ready data to a combined total of the ready data and not ready data.

Altering prefetch depth based on ready data

A method for printing images. A plurality of proof sheets having a thumbnail representation of at least some of the images, and at least one user-markable field indicative of at least one corresponding image when marked are printed. User-marked ones of the proof sheets are optically scanned to detect marked ones of the at least one user-markable field. The marked fields are processed to determine at least one selected image associated with each scanned proof sheet. At least one selected image is printed after the user-marked proof sheets have been scanned.

Image printing via a proof sheet

Exemplary systems and methods include pre-fetching data in response to a read cache hit. Various exemplary methods include priming a read cache with initial data, and triggering a read pre-fetch operation in response to a read cache hit upon the initial data in the read cache. Another exemplary implementation includes a storage device having a read cache and a trigger module that causes a pre-fetch of data from a mass storage medium in response to a read cache hit upon data in the read cache.

Method of triggering read cache pre-fetch to increase host read throughput

A storage device is configured with one or more processes that receive, process, and pass on jobs from a source. The number of jobs received by a process is compared with the number of jobs completed and/or passed on by the process. If the number of jobs that are received is disproportionate to the number of jobs completed and/or passed on by the process, a hang may exist and a corrective action, such as resetting, may be performed along with a request for all or some of the jobs to be resent.

Process job flow analysis

Exemplary systems, methods, and devices employ receiving an operational parameter characteristic of a storage device, and adapting a read cache pre-fetch depth based in part on the operational parameter. An exemplary device includes a read cache memory and a read cache pre-fetch adaptation module operable to generate an operational parameter and vary read cache pre-fetch depth in response to the operational parameter.

Method of adaptive read cache pre-fetching to increase host read throughput

Exemplary systems and methods analyze cache data to detect a sequential workload to facilitate pre-fetching effectiveness. An exemplary address analysis module for sequential workload detection generates one or more addresses related to a host address. If the cache memory contains data corresponding to one or more of the related addresses, a sequential workload may be occurring, and a read pre-fetch operation may be triggered. An indexing module may be used to map host and related addresses to corresponding indices in cache memory.

Method of detecting sequential workloads to increase host read throughput

Exemplary systems, methods, and devices dynamically characterize a portion of a total cache as a read cache or a write cache in response to a host workload. Exemplary systems, methods, and devices receive a host workload parameter and allocate cache memory to either of a read cache or a write cache based on the host workload parameter.

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Boise, ID, United States of America

Brian S Bearden