Pure Storage, Inc.
DISTRIBUTED MULTI-LEVEL PROTECTION IN A HYPER-CONVERGED INFRASTRUCTURE

Abstract:

A storage controller of a data storage subsystem including a plurality of storage devices in a redundant array of independent drives (RAID) configuration writes a first RAID stripe to the plurality of storage devices. Writing the first RAID stripe includes for each storage device of a subset of the plurality of storage devices, writing within a page of the storage device, user data, and checksums that validate the user data stored on storage devices of the subset of the plurality of storage devices and writing, within a page of a particular storage device of the plurality of storage devices inter-device redundancy data, intra-page error recovery data, and inter-page protection data.