In one embodiment, a system for managing a virtualization environment comprises a plurality of host machines, one or more virtual disks comprising a plurality of storage devices, a virtualized file server (VFS) comprising a plurality of file server virtual machines (FSVMs), wherein each of the FSVMs is running on one of the host machines and conducts I/O transactions with the one or more virtual disks, and a virtualized file server self-healing system configured to identify one or more corrupt units of stored data at one or more levels of a storage hierarchy associated with the storage devices, wherein the levels comprise one or more of file level, filesystem level, and storage level, and when data corruption is detected, cause each FSVM on which at least a portion of the unit of stored data is located to recover the unit of stored data.

First data is received for storing in a first asymmetric memory device. A first writing phase is identified as a current writing phase. A first segment included in the first asymmetric memory device is identified as next segment available for writing data. The first data is written to the first segment. Information associated with the first segment is stored, along with information indicating that the first segment is written in the first writing phase. Second data is received for storing in the asymmetric memory. A second segment included in the first asymmetric memory device is identified as the next segment available for writing data. The second data is written to the second segment. Information associated with the second segment and the second memory block is stored along with information indicating that the second segment is written in the second writing phase.

A method begins by a first device generating a self-validating message by creating a master key, using the master key to create a message encryption key, encrypting a message using the message encryption key to produce an encrypted message, encrypting the master key using a public key of a second device to produce an encrypted master key, and including a message authentication code of the first device in the self-validating message. The method continues by the second device receiving and decoding the self-validating message by verifying the message authentication code of the first device, and when the message authentication code of the first device is verified, decrypting the encrypted master key using a private key of the second device to recover the master key, using the master key to create the message encryption key, and decrypting the encrypted message using the message encryption key to recover the message.

Methods, computing systems and computer program products implement embodiments of the present invention that include configuring a first storage system to mirror first storage regions to corresponding second storage regions in a second storage system via a first data connection, and to mirror the first storage regions to corresponding third storage regions in a third storage system via a second data connection. Upon the second storage system receiving, subsequent to detecting a failure of the first storage system, a host I/O request to retrieve data from a given second storage region and determining that the respective timestamp of the corresponding third storage region on the third storage system is more recent than the respective timestamp of the given second storage region on the second storage system, the second storage system retrieves, via a third data connection, the data from the corresponding third storage region on the third storage system.

A method of managing a plurality of storage devices controlled in a RAID scheme includes detecting a failure disk among the storage devices, selecting one of a plurality of stripes of the storage devices according to a result of the detection, identifying a valid page of data included in a normal chunk of the selected stripe and a valid page of data of a lost chunk mapped to the failure disk with reference to address mapping information, recovering the valid page of the lost chunk among chunks included in the selected stripe with reference to information on the identified valid page, and copying the recovered valid page of the lost chunk and the valid page of the normal chunk to a new stripe of the storage devices.

The present disclosure provides a method and an apparatus for a storage system. The storage system includes an active storage site and a standby storage site, and a logical unit number LUN for a storage pool of the active storage site is replicated to a LUN for a storage pool of the standby storage site to form a consistency group. The method comprises: creating a first LUN and a second LUN as mirrors of each other at the active storage site and the standby storage site, respectively; adding the mirrors formed by the first LUN and the second LUN to the consistency group; after the second LUN is added to the storage pool of the standby storage site, adding the first LUN to the storage pool of the active storage site.

A system, method, and computer product for enabling a virtual service layer to consume a first storage medium and a second storage medium and map the storage mediums as one or more virtual storage volumes; wherein the one or more virtual volumes are mirrored at a first site and a second site, mirroring of the virtual storage volumes on a distributed mirror, and enabling a distributed replication service to create a continuous data protection image of the data written to one or more virtual storage volumes.

Disclosed herein are systems and methods for replicating data across deployments in a routing constrained environment. To replicate data, a processor may detect a modification that changes data for a source entity within a source environment hosting a source deployment of an application. The processor may then update a target environment hosting a target deployment of the application to mirror the modification within the source environment. To update the target environment, the processor may generate a mapping artifact that identifies the source entity having changed data and the target entity within the target environment receiving the changed data. The processor may then create a mapping infrastructure including one or more compute instances that replicate the changed data for the source entity in the target entity. To replicate data, the one or more compute instances may execute a mapping script that replicates the changed data from the source entity in the target entity by copying changed data from the source environment and writing it to a database in the target environment.

Failover methods and systems for a storage environment are provided. During a takeover operation to take over storage of a first storage system node by a second storage system node, the second storage system node copies information from a first storage location to a second storage location. The first storage location points to an active file system of the first storage system node, and the second storage location is assigned to the second storage system node for the takeover operation. The second storage system node quarantines storage space likely to be used by the first storage system node for a write operation, while the second storage system node attempts to take over the storage of the first storage system node. The second storage system node utilizes information stored at the second storage location during the takeover operation to give back control of the storage to the first storage system node.

A plurality of arrays of storage devices, each providing dual storage device redundancy, is provided. The plurality of arrays of storage devices includes a plurality of mirrored sets of primary storage devices, each including an even number of at least two or more primary storage devices. Each of the mirrored sets of primary storage devices stores a first and a second copy of data. The plurality of arrays of storage devices also includes a secondary storage device, which is a single physical storage device that stores a third copy of the data stored on each of the plurality of mirrored sets of primary storage devices. The secondary storage device has at least the capacity to store the data stored on the plurality of mirrored sets of primary storage devices. Dual storage device redundancy preserves data if data cannot be read from one or two physical storage devices in any array.