US9880738B2 - Placement and movement of sub-units of a storage unit in a tiered storage
environment - Google Patents US9880738B2 - Placement and movement of sub-units of a …

US10671284B2 - Placement and movement of sub-units of a storage unit in a tiered storage
environment - Google Patents US10671284B2 - Placement and movement of sub-units of a …

(57) ABSTRACT A storage controller configures a plurality of storage tiers. A Sub-unit of a
storage unit is maintained in a selected Storage tier of the plurality of storage tiers, for at …

A storage tier management application indicates a heat index for each extent of a plurality of
extents, wherein a higher heat index indicates a greater frequency of usage of tracks of an …

During a restart process in which metadata is loaded from at least one of a plurality of
storage devices into a cache, a storage controller is configured to generate an IO thread in …

One or more performance parameters associated with data stored at a storage device of a
plurality of storage devices are received by a storage controller. A first number of blocks of …

An approach is provided in which a storage system includes a first storage controller, a
second storage controller, and multiple logical units. The storage system detects that a con …

Mechanisms for managing data segments in a tiered storage system are provided. The
mechanisms maintain at least one counter for each data segment in the tiered storage …

A method for storing a data segment in a storage tier of a storage unit comprising at least two
storage tiers includes receiving the data segment to be stored including metadata; receiving …

An approach is provided in which a storage system includes a first storage controller, a
second storage controller, and multiple logical units. The storage system determines that a …