Emc IP Holding Company LLC

Dell Products Inc.

Colin Zou

Xinghai Yu

Tao Chen

Jian Gao

Xinlei Xu

Lifeng Yang

Ruiyong Jia

Lin Xiao

Peng Wu

Changyu Feng

Shuguang Gong

Sean Cheng Ye

James Fei Wu

A secure boot monitoring and validation process during operating system (OS) upgrade operations from a previous OS version. A validated copy of OS boot files is made during OS installation. A checksum comparator or OS boot file filesystem check (FSCK) component validates the boot files upon initial installation of the OS. Any validation failure indicates corruption or unwanted modification of the boot file data. In case of a failure, an autorecovery operation using different boot partitions is attempted, and the OS boot filesystem check is performed again. If the second filesystem check fails a critical alert notification is sent, otherwise a warning alert notification is sent. The file system for storing user data is also shutdown to prevent any potential damage of user data.

Error handling for runtime operations of operating system boot files for UEFI secure boot systems

Embodiments are described for a secure boot monitoring and validation process during operating system (OS) installation and runtime. A validated copy of OS boot files is made during OS installation. A checksum comparator or OS boot file filesystem check (FSCK) component validates the boot files upon initial installation of the OS. Any validation failure indicates corruption or unwanted modification of the boot file data, and an alert is sent. The file system is locked to prevent any exposure of user data. The validated copy is then used to recover the boot files. An OS boot file monitor component periodically monitors the boot files during OS run time and if any corruption is detected during a system boot after OS installation, the boot blocking, alert, and recovery procedures can be invoked.

Validation and recovery of operating system boot files during OS installation and runtime for UEFI secure boot systems

A secure boot monitoring and validation process for operating system (OS) initial installation or upgrade operations. A validated copy of OS boot files is made during OS installation. The boot files are stored in a first RAID array. A checksum comparator or OS boot file filesystem check (FSCK) component validates the boot files upon initial installation of the OS by comparison with a secure copy of the boot files, which are stored in a second RAID array. Any validation failure indicates corruption or unwanted modification of the boot file data, and an autorecovery operation using different boot partitions is attempted.

Raid array for validating and recovering operating system boot files for UEFI secure boot systems

Embodiments of the present disclosure relate to method, device and computer program product for data backup. The method comprises: in response to receiving from a backup server a data stream to be backed up, dividing the data stream into a plurality of data segments; distributing the plurality of data segments to at least one computing node; in response to receiving an index of a corresponding data segment from a first computing node of the at least one computing node, looking up the index in a global index cache, the index being generated by the first computing node to uniquely identify the data segment, the global index cache storing indexes of data in a backup storage device; in response to the missing index in the global index cache, adding the index into the global index cache; and sending to the first computing node an indication to store the data segment in the backup storage device.

Method, device and computer program product for data backup

A computer implemented method of data compression using a hardware accelerator includes submitting a request to compress or decompress a data segment using a compression or decompression thread. The method also includes compressing or decompressing the data segment using a hardware accelerator, and performing inline polling of the hardware accelerator to determine whether the hardware accelerator has completed compressing or decompressing the data segment. The inline polling and the compressing or decompressing are performed in a single thread. The method also includes submitting a wakeup command to a segment thread in response to determining that the hardware accelerator has completed compressing or decompressing the data segment.

Adaptive inline polling of data compression with hardware accelerator

One embodiment provides a computer implemented method for recovering an operating system (OS) after an upgrade hang using a dual-flash device. The method includes detecting a system hang during an OS upgrade; initiating a boot from the dual-flash device; checking for OS configuration data in the dual-flash device; creating a hook in OS boot scripts to recover the OS configuration data after OS boot; and applying the OS configuration data after OS boot.

System and method for recovering an operating system after an upgrade hang using a dual-flash device

A computer implemented method of data decompression and verification includes decompressing a compressed data segment to generate a decompressed data region. The method also includes generating a segment vector array (SVA) including a number of segment vectors corresponding to data segments within the decompressed data region, each segment vector indicating a location and a size of a corresponding data segment. The method also includes transmitting the SVA to a chain plugin module and transmitting segment vector array data to a SVA-based message constructor. The method also includes constructing a SVA-based message including the location and size of data segments within the decompressed data region, and transmitting the SVA-based message to a hardware accelerator. The method also includes performing verification sessions at the hardware accelerator, each verification session corresponding to a specific data segment indicated by the SVA-based message.

System and method for data-layout aware decompression and verification using a hardware accelerator chain

One embodiment provides a computer implemented method of for monitoring and upgrading a dual-flash device. The method includes performing an OS upgrade on a server; writing an upgraded OS to the dual-flash device; updating a grub.cfg file corresponding to the upgraded OS; and deleting old OS files from the dual-flash device.

System and method for monitoring and upgrading a dual-flash device

Embodiments of the present disclosure disclose methods and devices of data de-duplication. The method of data de-duplication performed at a client comprises: in response to receiving data to be backed up at a client, sampling the data to be backed up to obtain the sampled data; generating a signature for the sampled data; transmitting the signature to a master storage node in a storage cluster including a plurality of storage nodes, to allow the master storage node to select one storage node from the plurality of storage nodes; receiving an indication of the selected storage node from the master storage node; and transmitting, based on the indication, the data to be backed up to the selected storage node. Embodiments of the present disclosure also provide methods of data de-duplication performed at the master storage node and the slave storage node, and corresponding devices.

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San Jose, CA, United States of America

Colin Zou