International Business Machines Corporation

Ronald J Venturi

Joseph S Hyde, Ii

Joanna Katharine Brown

M Amine Hajji

William John Durica

Jonathan Ian Settle

David Ray Kahler

Michael John Jones

Roderick Guy Charles Moore

Tram Thi Mai Nguyen

Lucy Amanda Raw

Thomas Van Der Veen

Trevor John Boardman

Carl D Kambites

David Lawrence Leskovec

A mechanism is provided for controlling a solid state disk. A failure detector detects a failure in the solid state disk. Responsive to failure detector detecting a failure, a status degrader sets a degraded status indicator for the solid state disk. Responsive to the degraded status indicator, a degraded status controller maintains the solid state disk in operation in a degraded operation mode.

Controlling a solid state disk (SSD) device

Provided are a system, method and article of manufacture for validating an expected data output of an application under test. A first table comprising named columns populated with the expected data output and a second table comprising named columns associated with the expected data output of the named columns of the first table are retrieved. The named columns of the first table are compared with the named columns of the second table. An alert is generated in response to detecting a difference between a characteristic of a named column of the first table and a characteristic of a named column of the second table.

Command line testing

Provided are a method, system, and article of manufacture, wherein a request to write data to a storage medium is received. The data requested to be written to the storage medium is stored in a cache. A writing of the data is initiated to the storage medium. A periodic determination is made as to whether the stored data in the cache is the same as the data written to the storage medium.

Detection and recovery of dropped writes in storage devices

A method and system for saving and retrieving data includes saving data in data storage fields of a data storage device in a computer. A back-up data storage field is selected in the data storage device. A data changing operation including new data is initiated on specified data saved in a current data storage field. A copy of all the data stored in boundary data storage fields is copied and stored in the back-up data storage field before changing the current data to provide data retrieval if the data is unrecoverable in the current data storage field, when a loss of power to the data storage device occurs.

Method for protecting exposed data during read/modify/write operations on a SATA disk drive

A method of storing data blocks onto sectors of a storage device comprises determining a specific number n of blocks, where n is greater than 1, storing n blocks consecutively onto consecutive sectors, such that each block begins directly after the previous block ends, repositioning the storing at the beginning of the next sector, and storing a further n blocks consecutively onto consecutive sectors, such that each block begins directly after the previous block ends.

Storing data blocks to maximize the amount of storage space used in a storage device

An architecture for error log processing is provided. Each error log is given a defined priority and mapped to an error recovery procedure (ERP) to be run if the log is seen. The system has a plurality of software layers to process the errors. Each software layer processes the error independently. Errors are reported to a higher software stack when error recovery fails from the lower stack ERPs and recovery is non-transparent. If the system host identified for error processing fails, the control of the ERP is transferred during the failover process. Non-obvious failed component isolating ERPs are grouped to be run together to assist in isolating the failed component. Prioritization of the error systems may be based on a plurality of criteria. ERPs are assigned to run within a particular software stack.

Error processing across multiple initiator network

A method, apparatus and program storage device for protecting data write operations against write failures in a data storage device is provided. The data storage device includes a storage medium, a write cache including a copy of data written to the storage medium, and a controller configured for testing data write operations to the storage medium. The controller tests data write operations to the storage medium before the write cache is flushed to confirm that it is safe to flush the write cache. If the test fails, the data in the write cache can be recovered.

Method, apparatus and program storage device for protecting data writes in a data storage device

A method and apparatus is disclosed in which a storage device controller is arranged to use a set of sequential physical block addresses on a storage device as a single logical block address.

Growing community of inventors

Winchester, United Kingdom

Ronald J Venturi