Notification of trigger condition to reduce declared capacity of a storage device in a multi-storage-device storage system

摘要

Systems, methods and/or devices are used to enable notification of a trigger condition to reduce declared capacity of a storage device in a multi-storage-device storage system. In one aspect, the method includes: (1) obtaining, for each storage device of a plurality of storage devices, one or more metrics of the storage device, the storage device including non-volatile memory, (2) detecting a trigger condition for reducing declared capacity of the non-volatile memory of a respective storage device of the plurality of storage devices, the trigger condition detected in accordance with the one or more metrics of two or more of the storage devices, and (3) notifying a host of the trigger condition for reducing declared capacity of the non-volatile memory of the respective storage device, the trigger condition for enabling performance of an amelioration process to reduce declared capacity of the non-volatile memory of the respective storage device.

主权项

1. A method of managing a storage system, the method comprising:
obtaining, for each storage device of a plurality of storage devices of the storage system, one or more metrics of the storage device, the storage device including non-volatile memory; detecting a trigger condition for reducing declared capacity of the non-volatile memory of a respective storage device of the plurality of storage devices of the storage system, wherein declared capacity is storage capacity available to a host and wherein a total storage capacity of the non-volatile memory of the respective storage device includes declared capacity and over-provisioning, the trigger condition detected in accordance with the one or more metrics of two or more of the storage devices of the plurality of storage devices in the storage system; notifying the host to which the respective storage device is operatively coupled of the trigger condition for reducing declared capacity of the non-volatile memory of the respective storage device, the trigger condition for enabling performance of an amelioration process to reduce declared capacity of the non-volatile memory of the respective storage device; prior to detecting the trigger condition, detecting a first wear condition of the non-volatile memory of the respective storage device; and in response to detecting the first wear condition, performing a remedial action that reduces over-provisioning of the non-volatile memory of the respective storage device without reducing declared capacity of the non-volatile memory of the respective storage device; wherein detecting the trigger condition comprises detecting a second wear condition distinct from the first wear condition.