Abstract: A data storage system in which physical extents of non-volatile data storage are provisioned from non-volatile data storage devices of disparate types for purposes of data mirroring. Data indicated by at least one write operation is mirrored onto the physical extents of non-volatile data storage provisioned from the non-volatile data storage devices of disparate types. A change in performance requirements for the data may cause a new physical extent to be provisioned from another type of non-volatile data storage device, and then used to replace one of the originally provisioned physical extents, such that data indicated by subsequently received write operations is mirrored onto the newly provisioned physical extent and those of the originally provisioned physical extents that were not replaced by the newly provisioned physical extent.

Abstract: Disclosed herein are techniques for use in managing data storage. For example, in one embodiment, the techniques comprise determining a size of the write request. The size of the write request equating to half or more non-parity data portions in a full stripe of data but less than all non-parity data portions in the full stripe.

Abstract: Disclosed herein are techniques for use in managing data storage. For example, in one embodiment, the techniques comprise determining a size of the write request. The size of the write request equating to half or more non-parity data portions in a full stripe of data but less than all non-parity data portions in the full stripe.

Abstract: A method is used in managing mapping metadata in storage systems. A request is received to access data organized on a storage device of a storage system. Checksum information is used for validating the data. The checksum information is stored on the storage system separate from a location at which the data has been stored.

Abstract: Techniques for a method of processing events are described. A first notification is received regarding an occurrence of a first event identifying a first physical drive coming online. It is determined whether the first event is dependent on one or more other events that have not yet occurred. If it is determined that the first event depends on one or more other events that have not yet occurred, performing first processing to defer processing of the first event until the one or more other events have occurred. If it is determined that the first event does not depend on the one or more other events that have not yet occurred, the first event is processed.