Inventor

BENHASE MICHAEL T

US225 patents

⚠️ This page may combine multiple inventors who share the name “BENHASE MICHAEL T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BENHASE MICHAEL T

IBM

Invalid data detection, recording and nullification

Method and apparatus for converting addresses of a backing store having addressable data storage devices for accessing a cache attached to the backing store

Caching source blocks of data for target blocks of data

Create virtual track buffers in NVS using customer segments to maintain newly written data across a power loss

Method and apparatus for efficient updating of CKD data stored on fixed block architecture devices

Nonsynchronous dasd control

Managing high speed slow access channel to slow speed cyclic system data transfer

Apparatus and method to manage a data cache using a first and second least recently used list

Method for extraction of a variable length record from fixed length sectors on a disk drive

Method and system for enhancing the efficiency of communication between multiple direct access storage devices and a storage system controller

Method for operating a cached peripheral data storage subsystem including a step of subsetting the data transfer into subsets of data records

Dynamic polling of devices for nonsynchronous channel connection

System and method for regulating access to direct access storage devices in data processing systems

Disk rotational position controls for channel operations in a cached peripheral subsystem

Method for error recovery in a non-synchronous control unit

Thresholding task control blocks for staging and destaging

Efficient cache management of multi-target peer-to-peer remote copy (PPRC) modified sectors bitmap

Recovery from cache and NVS out of sync

Merging an out of synchronization indicator and a change recording indicator in response to a failure in consistency group formation

Grouping tracks for destaging

Assigning device adaptors to use to copy source extents to target extents in a copy relationship

Replicating tracks from a first storage site to a second and third storage sites

Use of differing granularity heat maps for caching and migration

Source-target relations mapping

Adjustment of the number of task control blocks allocated for discard scans

Tiered caching and migration in differing granularities

Promotion of partial data segments in flash cache

Data archiving using data compression of a flash copy

Demoting tracks from a first cache to a second cache by using an occupancy of valid tracks in strides in the second cache to consolidate strides in the second cache

Scanning modified data during power loss

Management method for spare disk drives in a raid system

BENHASE MICHAEL T

Selective space reclamation of data storage memory employing heat and relocation metrics

Apparatus and method for sharing resources between storage devices

Efficient discard scans

Dynamically adjusted threshold for population of secondary cache

Assigning device adaptors and background tasks to use to copy source extents to target extents in a copy relationship

Adjusting location of tiered storage residence based on usage patterns

Populating strides of tracks to demote from a first cache to a second cache

Populating strides of tracks to demote from a first cache to a second cache

Caching data in a storage system having multiple caches including non-volatile storage cache in a sequential access storage device

Using an attribute of a write request to determine where to cache data in a storage system having multiple caches including non-volatile storage cache in a sequential access storage device

Management of partial data segments in dual cache systems

Promotion of partial data segments in flash cache

Compression on thin provisioned volumes using extent based mapping

Apparatus, system, and method for enhanced block-level deduplication

Adaptive record caching for solid state disks

ASH KEVIN J

Caching source blocks of data for target blocks of data

Populating a first stride of tracks from a first cache to write to a second stride in a second cache

Managing unmodified tracks maintained in both a first cache and a second cache

BEARDSLEY BRENT C

Management of write cache using stride objects