Patent application number | Description | Published |
20110022931 | MEMORY MANAGEMENT IN A NON-VOLATILE SOLID STATE MEMORY DEVICE - A computer-implemented method of managing a memory of a non-volatile solid state memory device by balancing write/erase cycles among blocks to level block usage. The method includes: monitoring an occurrence of an error during a read operation in a memory unit of the device, wherein the error is correctable by error-correcting code; and programming the memory unit according to the monitored occurrence of the error; wherein the step of monitoring the occurrence of an error is carried out for at least one block; and wherein said step of programming comprises wear-leveling the monitored block according the error monitored for the monitored block. A computer system and a computer program-product is also provided. | 01-27-2011 |
20120110247 | MANAGEMENT OF CACHE MEMORY IN A FLASH CACHE ARCHITECTURE - A method for managing cache memory in a flash cache architecture. The method includes providing a storage cache controller, at least a flash memory comprising a flash controller, and at least a backend storage device, and maintaining read cache metadata for tracking on the flash memory cached data to be read, and write cache metadata for tracking on the flash memory data expected to be cached. | 05-03-2012 |
20120131381 | Operating a Data Storage System - A data storage system including at least one memory device array including memory devices for storing data; and a storage subsystem controller for performing a method for operating the memory devices within the memory device array by relocating parity entities from a first memory device to a spare memory device replacing a failed memory device, and by storing one or more of reconstructed data entities on the first memory device. | 05-24-2012 |
20120284231 | DISTRIBUTED, ASYNCHRONOUS AND FAULT-TOLERANT STORAGE SYSTEM - Methods and systems for reading from and writing to a distributed, asynchronous and fault-tolerant storage system. The storage system includes storage nodes communicating with clients. The method includes a first client writing an object to the storage system and a second client reading the object from the storage system. For the first client, previous transient metadata relating to a previously written version of the object is retrieved and a new version of the object together with new transient metadata is stored. For the second client, a set of transient metadata from a third set of nodes amongst storage nodes is retrieved, a specific version of the object as stored on the storage system is determined, and a specific version of the corresponding object from a fourth set of nodes amongst storage nodes is retrieved. Two sets of nodes amongst all sets have at least one node in common. | 11-08-2012 |
20120323851 | DISTRIBUTED, ASYNCHRONOUS AND FAULT-TOLERANT STORAGE SYSTEM - Methods and systems for reading from and writing to a distributed, asynchronous and fault-tolerant storage system. The storage system includes storage nodes communicating with clients. The method includes a first client writing an object to the storage system and a second client reading the object from the storage system. For the first client, previous transient metadata relating to a previously written version of the object is retrieved and a new version of the object together with new transient metadata is stored. For the second client, a set of transient metadata from a third set of nodes amongst storage nodes is retrieved, a specific version of the object as stored on the storage system is determined, and a specific version of the corresponding object from a fourth set of nodes amongst storage nodes is retrieved. Two sets of nodes amongst all sets have at least one node in common. | 12-20-2012 |
20130117600 | MEMORY MANAGEMENT IN A NON-VOLATILE SOLID STATE MEMORY DEVICE - A computer-implemented method of managing a memory of a non-volatile solid state memory device by balancing write/erase cycles among blocks to level block usage. The method includes monitoring an occurrence of an error during a read operation in a memory unit of the device, where the error is correctable by error-correcting code, and programming the memory unit according to the monitored occurrence of the error, where the step of monitoring the occurrence of an error is carried out for at least one block, and wherein said step of programming includes wear-leveling the monitored block according the error monitored for the monitored block. | 05-09-2013 |
20130138912 | SCHEDULING REQUESTS IN A SOLID STATE MEMORY DEVICE - An apparatus and method for a memory controller for managing scheduling requests in a solid state memory device. The memory includes a set of units wherein a unit within the set of units is erasable as a whole by a unit reclaiming process resulting in a free unit available for writing data to. The memory controller further includes a first queue for queuing user requests for reading and/or writing data from/to the memory, and a second queue for queuing unit reclaiming requests for executing the unit reclaiming process. A scheduler is provided for selecting user requests from the first queue and unit reclaiming requests from the second queue for execution according to a defined ratio. The defined ratio is a variable ratio, is dependent on the current number of free units, and permits the memory controller to select requests from both the first queue and the second queue. | 05-30-2013 |
20130159609 | PROCESSING UNIT RECLAIMING REQUESTS IN A SOLID STATE MEMORY DEVICE - An apparatus and method for processing unit reclaiming requests in a solid state memory device. The present invention provides a method of managing a memory which includes a set of units. The method includes selecting a unit from the set of units having plurality of subunits. The method further includes determining a number of valid subunits m to be relocated from the units selected for a batch operation where m is at least 2. The selecting is carried out by a unit reclaiming process. | 06-20-2013 |
20130191704 | MEMORY MANAGEMENT IN A NON-VOLATILE SOLID STATE MEMORY DEVICE - A non-volatile solid state memory device and method for balancing write/erase cycles among blocks to level block usage. The non-volatile solid state memory device includes a memory unit having data stored therein and a controller with logic for programming the memory unit according to a monitored occurrence of an error during a read operation. The method includes monitoring an occurrence of an error during a read operation in a memory unit of the device and programming the memory unit according to the monitored occurrence of the error. | 07-25-2013 |