Intel Corporation

James P Freyensee

Phil C Cayton

Jay E Sternberg

Dave B Minturn

Anthony J Knapp

Sanjeev N Trika

Bryan E Veal

Methods and apparatus related to enabling individual NVMe (Non-Volatile Memory express) IO (Input Output or I/O) queues on differing network addresses of an NVMe controller are described. In one embodiment, a plurality of backend controller logic is coupled to a plurality of non-volatile memory devices. One or more virtual controller target logic (coupled to the plurality of backend controller logic) transmit data from a first portion of a plurality of IO queues to a first backend controller logic of the plurality of the backend controller logic. The one or more virtual controller target logic transmit data from a second portion of the plurality of IO queues to a second backend controller logic of the plurality of backend controller logic. Other embodiments are also disclosed and claimed.

Method and apparatus to enable individual non volatile memory express (NVME) input/output (IO) queues on differing network addresses of an NVME controller

Provided are a computer product, method, and system to virtualize target system storage resources as virtual target storage resources. Target storage resources available at a target system are discovered over a network. A configuration is determined of virtual target storage resources mapping to the target storage resources for a host node. The configuration is registered with a virtual target. The configuration maps the virtual target storage resources to the target storage resources at the target system and an access control list of the host node allowed to access the virtual target storage resources. A query is received from the host node for the target storage resources the host node is permitted to access according to the access control list. Host discovery information is returned to the requesting host node indicating the virtual target storage resources the requesting host node is provisioned to access from the virtual target.

Management of accesses to target storage resources

A computer product, method, and system to generate a virtual subsystem to process read and write requests to storage devices. A virtual controller is configured in a memory device to provide a representation of a controller in a computer system. At least one virtual storage is configured in the memory device. A virtual storage is assigned a quantity of physical storage configured in a plurality of storage devices, wherein the virtual storage maps to addresses in the quantity of physical storage. At least one virtual storage is assigned to a virtual controller. A host is assigned to the virtual storage assigned to the virtual controller. The host assigned the virtual storage is allowed to direct read and write requests to the quantity of physical storage assigned to the virtual storage.

Computer product, method, and system to dynamically manage storage devices accessed remotely over a network

Method and apparatus to enable individual non volatile memory express (NVMe) input/output (IO) queues on differing network addresses of an NVMe controller

Management of virtual target storage resources by use of an access control list and input/output queues

Provided are a computer product, method, and system to dynamically provide discovery services for host nodes of target systems and storage resources in a network. Discover on storage resources available at target systems. An access control list indicates subsets of the host nodes that can access the storage resources at the target systems. A query is received from a requesting host node comprising one of the host nodes for storage resources the host node is permitted to access according to the access control list. Host discovery information is returned to the requesting host node indicating the storage resources the requesting host node is provisioned to access, wherein the requesting host node establishes a connection with the target systems indicated in the returned host discovery information to access the storage resources the requesting host node is provisioned to access indicated in the access control list.

Computer product, method, and system to dynamically provide discovery services for host nodes of target systems and storage resources in a network

Provided are a computer program product, method, and system to transfer storage input/output (I/O) requests to host and target systems on different fabrics. An origination packet is received from an originating node over a first network to a destination node having a storage device. The origination packet includes a first fabric layer for transport through a first network, a command in a transport protocol with a storage Input/Output (I/O) request, with respect to the storage device at the destination node, and a host memory address. A destination packet is constructed including a second fabric layer for transport through a second network and the command in the transport protocol to send the storage I/O request and a transfer memory address that maps to the host memory address. The destination packet is sent over the second network to the destination node to perform the storage I/O request.

Computer program product, system, and method to allow a host and a storage device to communicate between different fabrics

Systems, apparatuses and methods may provide for communicating, by a common layer, with a local block storage system and communicating, by a subsystem layer that is communicatively coupled to the common layer, with one or more subsystems. Additionally, the common layer may be disassociated with one or more hardware specific components of the subsystem layer. In one example, the common layer may export one or more callback functions to the subsystem layer, wherein the callback functions include a registration and/or deregistration function.

Disaggregating block storage controller stacks

Provided are a computer product, method, and system to generate a virtual subsystem to process read and write requests to storage devices. A virtual subsystem is configured in the memory to provide a representation of a subsystem presented to at least one host system. The at least one host system is to communicate with the virtual subsystem to access the at least one storage device. At least one virtual namespace is configured in the memory for the virtual subsystem. Each of the at least one virtual namespace maps to at least one physical namespace in at least one storage device. Each virtual namespace is assigned to one host system to use to direct read and write requests to the at least one physical namespace of the at least one storage device assigned to the virtual namespace.

Method and apparatus to enable individual non volatile memory express (NVME) input/output (IO) Queues on differing network addresses of an NVME controller

Computer product, method, and system to provide discovery services to discover target storage resources and register a configuration of virtual target storage resources mapping to the target storage resources and an access control list of host nodes allowed to access the virtual target storage resources

Disclosed are solutions for resolving a redundant array of independent disks (RAID) write hole, or a parity-based fault scenario that occurs when a power failure and a drive failure occur at or close to the same time. Drive array controller logic assigns a sequence number to write operations received from a computing system and converts respective write operations, including corresponding sequence numbers, to a multiple-drive write to a series of RAID drives. A microcontroller at each drive writes, to a history log (HLOG) on the drive, a logical-to-physical address mapping of a prior sector of the drive that was written along with a corresponding sequence number. Upon receipt of a new write to the mapped logical address, the microcontroller removes the HLOG entry for the logical address, and writes a new entry to the HLOG with a new physical address mapping to the logical address with a new sequence number.

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Hillsboro, OR, United States of America

James P Freyensee