Hewlett Packard Enterprise Development LP

Hewlett-packard Development Company, L.p.

Compaq Computer Corporation, Inc.

Robert C Elliott

Gregory N Santos

Robert A Lester

Phillip M Jones

Ronald Timothy Horan

Joseph Foster

John Norton

William C Galloway

Keith A Sauer

Theodore F Emerson

Siamak Tavallaei

Troy Anthony Della Fiora

Reza Mushtag Bacchus

James Jeffery Schulze

Hubert E Brinkmann

Darrel G Gaston

Thomas W Grieff

Melvin K Benedict

Curtis C Ballard

Dwight D Riley

James Alexander Fuxa

David J Maguire

Maria L Melo

Greg John Pellegrino

Jeff W Wolford

Khaldoun Alzien

Todd J Deschepper

Robert J Volentine

Leonard E Russo

James R Reif

Walter A Gaspard

Michael White

Christopher Martin

Jeffrey A Plank

Richard J Tomaszewski

Frank L Wu

Viratkumar Maganlal Manvar

David Wagner

Mike Sabotta

Michael McGowen

Joseph E Foster

A non-transitory machine-readable storage medium stores instructions that, when executed by the machine, cause the machine to provide a firewall interface between a plurality of registers of a controller and a host interface of the controller. Providing the firewall interface includes programming the firewall interface with a plurality of firewall rules. The registers are to control functions that are performed by the controller; and the plurality of firewall rules control whether requests to access the plurality of registers are denied, allowed or modified based on features of the request.

Host firewall interfaces for controllers

A supervisor provides a plurality of virtual nodes. A storage medium stores a plurality of information elements. A controller, which is separate from the supervisor, provides a plurality of virtual precision time protocol (PTP) clock devices. Each virtual PTP clock device corresponds to an information element. The controller uses the information element corresponding to a given virtual precision time protocol clock device to provide a precision time protocol-based time for the given virtual precision time protocol clock device.

Virtual precision time protocol clock devices for virtual nodes

In some examples, a storage medium stores a plurality of information elements that relate to corresponding virtual trusted platform module (TPM) interfaces, where each respective information element of the plurality of information elements corresponds to a respective virtual machine (VM). A controller provides virtual TPMs for respective security operations. A processor resource executes the VMs to use the information elements to access the corresponding virtual TPM interfaces to invoke the security operations of the virtual TPMs, where a first VM is to access a first virtual TPM interface of the virtual TPM interfaces to request that a security operation of a respective virtual TPM be performed.

Virtual trusted platform modules

In some examples, a storage medium stores information relating to reset ports associated with respective virtual machines (VMs) of a plurality of VMs. A controller detects, based on the information, an activation of a first reset port associated with a first VM of the plurality of VMs. In response to the detecting, the controller provides an indication of the activation of the first reset port to a hypervisor that is separate from the controller, the indication to cause the hypervisor to reset the first VM.

System reset using a controller

In some examples, a storage medium to stores information indicating address locations of virtual serial ports, where the virtual serial ports are associated with respective virtual machines (VMs). A controller that is separate from a hypervisor is to detect, based on the information, an access of a first virtual serial port associated with a first VM of the plurality of VMs, and communicate data between the first VM and another entity through the first virtual serial port.

Virtual serial ports for virtual machines

An apparatus comprising: a drive carrier assembly (DCA) including; an energy storage device having at least a portion thereof encased by a housing; and a printed circuit assembly to detect a power failure of a host computing device, wherein the printed circuit assembly has a first portion coupled to the energy storage device and a second portion coupled to a backplane of the host computing device.

Device carrier assemblies

An example apparatus comprises a drive carrier assembly which may include a memory device, and an energy storage device having at least a portion thereof encased in a housing. In some examples, the apparatus may include a printed circuit assembly to detect a power failure of a host computing device. The printed circuit assembly, may have a first portion coupled to the energy storage device and a second portion coupled to a backplane of the host computing device.

Drive carrier assemblies

An example memory system may include a central processing unit (CPU) comprising a CPU cache, a storage class memory, a volatile memory and a memory controller. The memory controller is to store, in the storage class memory, a first cache line including first data and a first directory tag corresponding to the first data. The memory controller is to further store, in the storage class memory, a second cache line including second data and a second directory tag corresponding to the second data. The memory controller is to store, in the volatile memory, a third cache line that comprises the first directory tag and the second directory tag, the third cache line excluding the first data and the second data.

Volatile memory cache line directory tags

In some examples, a device includes a memory controller to, during a power-on process of the device: read encrypted data from a nonvolatile memory, decrypt, using a first key, the encrypted data to produce decrypted data, encrypt, using a second key different from the first key produced as part of rekeying, the decrypted data to produce new encrypted data, and write the new encrypted data to the nonvolatile memory. A power-on code is to prevent booting of the device until all data in the nonvolatile memory has been encrypted using the second key.

Rekeying keys for encrypted data in nonvolatile memories

In one example in accordance with the present disclosure, a device comprising a host computing device further comprises a processor, a non-volatile dual inline memory module (NVDIMM) comprising metadata indicating system configuration information associated with the NVDIMM, and a basic input output system (BIOS) comprising system configuration information associated with the host computing device. The BIOS may: determine whether there is a mismatch between the system configuration information of the host computing device and the system configuration information indicated by the metadata.

NVDIMM metadata

Certain examples described herein relate to power control in a storage subsystem. Some examples may detect a new storage device and inhibit activation of the new storage device responsive to a determination that activating the new storage device would exceed a power limit.

Power control in a storage subsystem

A method, system and computer readable medium for presenting unique Serial Attached Small computer system interface (SAS) target devices through a single target device. The method includes embedding a SAS protocol chip within an initiator-connectable device, the SAS protocol chip having storage for at least two SAS addresses and configured to select a single address, loading two or more SAS addresses into the SAS protocol chip, and mapping a respective SAS address to one of the unique target devices. The system includes a SAS protocol chip having storage for at least two SAS addresses and a method for selecting a single SAS address, and a processor unit connected to the SAS protocol chip by an interface bus, the processor configured to load two or more identifier addresses into the SAS protocol chip. The computer readable medium contains instructions that cause a processor to perform the described methods.

System and method for presenting devices through an SAS initiator-connected device

A command is received to overwrite a medium. A threshold number of tracks is overwritten using a write head, in response to the command. The write head is then moved based on the threshold number. The threshold number is greater than one.

Overwrite threshold number of tracks

A communication system and method are disclosed. The system includes a receiver to receive and process a transmission signal provided from a transmitter based on a digital input signal, and to generate a receiver signal that indicates eye characteristics associated with transmission characteristics of the processed transmission signal. The transmission characteristics can be set by a digital filter associated with the transmitter based on filter parameters. The system further includes a transmitter training system to implement a plurality of experiments based on implementing Design of Experiments (DOE) to provide the filter parameters to the transmitter and to evaluate the corresponding eye characteristics to determine an output set of filter parameters.

Experiments transmitter training systems and method

Growing community of inventors

Houston, TX, United States of America

Robert C Elliott