Abstract: Data storage facilities that provide data storage services are typically arranged as either individually accessible drive facilities or multi-carrier drive facilities, but both types must contend with hardware failures that require storage device (e.g., drives) to be replaced. Multi-carrier drive facilities generally have greatly increased drive density, but are confronted with challenges with respect to service operations that are not present for facilities with individually accessible drives. For example, replacing a faulted storage device can entail bringing the faulted storage device as well as other (e.g., non-faulted) storage devices offline during the service operation, which can impact the data storage services. Techniques that improve service for multi-carrier drive facilities are presented. Such techniques can improve coordination between elements that manage the storage facility and those that provide service to faulted storage elements.

Abstract: An I/O interface module of a storage system controller includes a management controller and power regulation and monitoring/control circuitry responsible for management of the I/O expansion module and pluggable I/O interface modules, which each include electrical power regulating circuitry to power circuit components. Temperature regulation components (e.g. fan and temperature sensor) provide a cooling airflow and monitor operating temperature. A controller works with the power regulation and monitor/control circuitry and temperature regulation components to perform first and second management activities concurrently. The first management activity involves managing the environmental operating conditions of the I/O expansion module itself, including (i) monitoring and regulating operating temperature and (ii) monitoring and controlling electrical power regulating circuitry of the power regulation and monitor/control circuitry.

Abstract: A system having a processor, a printed circuit board, and an adapter board, coupled to the processor through the printed circuit board. The adapter board provides a first signal having a first state when the adapter board is in a proper operating condition and a second state when the adapter board is in an improper condition. The adapter board produces a second signal having the second state for less than a predetermined time when an adapter board requires a reset signal from the processor. The adapter board combines the first signal with the second signal a single signal fed to the processor through the printed circuit board. When the processor detects that the single signal is in the second state for a time less than the predetermined period of time, the process interprets the single signal as indicating the adapter board requires a reset.