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7624301 |
Method and apparatus for identifying failure module
A failure-data register unit receives failure data from a failure detecting module. Based on the failure data, a test-execution instructing unit instructs each module to execute access tests for...
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7616132 |
Method and system for reducing contexts for context based compression systems
For context based compression techniques, for example Context Based YK compression, a method and system for grouping contexts from a given context model together to create a new context model that...
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7613961 |
CPU register diagnostic testing
One embodiment disclosed relates to a method of compiling a program to be executed on a target central processing unit (CPU). The method includes opportunistically scheduling diagnostic testing of...
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7606961 |
Computer system and data pre-fetching method
A computer system according to an example of the invention comprises SPEs and a global memory. The SPEs include a running SPE and an idling SPE. The running SPE and the idling SPE each have a...
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7568054 |
Duplicate synchronization system and method of operating duplicate synchronization system
The duplicate synchronization system has: a first system; and a second system operating in synchronization with the first system. The first and the second systems are connected to each other. The...
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7565568 |
Method and system for virtualization switch failover
A method and system for virtualization switch failover is disclosed. According one embodiment of the present invention, a failure of a first virtualization device within storage a area network...
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7539788 |
Data processing system for keeping isolation between logical partitions
When a subject of access of a transaction from an IO device is not any resource allocated to a logical partition to which the device having issued the transaction belongs, a report as an error is...
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7533297 |
Fault isolation in a microcontroller based computer
A method and data processing system for isolating a faulty component in a computer. A first microcontroller detects a fault in a component of a computer. Responsive to detecting the fault, the...
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7519854 |
Internal failover path for SAS disk drive enclosure
A serial SCSI (SAS) storage drive system includes a drive enclosure having a first interface card coupled to one storage controller over a single SAS path and a second interface card coupled to...
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7509527 |
Collection of operation information when trouble occurs in a disk array device
A disk array device has: a CM separating part that, when abnormality occurs in a CM, separates the CM in which the abnormality has occurred from a storage system after write of CM operation...
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7490264 |
Method for error handling in a dual adaptor system where one adaptor is a master
Provided is a method for processing Input/Output (I/O) requests to a storage network including at least one storage device and at least two adaptors, wherein each adaptor is capable of...
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7487389 |
Method for achieving higher availability of computer PCI adapters
PCI (Peripheral Component Interconnect) adapters capable of dynamically switching between being controlled by a system processor and a specialized input/output processor (IOP), are utilized. A...
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7484032 |
Fault tolerant computer system
A computing hardware and software device called a Meta Mentor Central Processing Unit. The Meta Mentor purpose is to control memory, input/output interfaces, defining the operating system, the...
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7480815 |
Controller communications over an always-on controller interconnect
A controller interconnect structure within a RAID disk array enables continuous low latency/high bandwidth communications between a plurality of controller pairs within the array. Mirror buses...
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7467322 |
Failover method in a cluster computer system
In a computer system having a cluster configuration, a reset command issued from each of computers to any of the other computers is transmitted to a reset control unit. A control module of the...
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7447933 |
Fail-over storage system
A storage system 1 including multiple slots for loading a block I/O interface controller, a file I/O interface controller, and any other kinds of interface controllers that are combined freely....
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7437604 |
Network storage appliance with integrated redundant servers and storage controllers
A network storage appliance includes a chassis, enclosing a storage controller and first and second servers. The storage controller has first and second I/O ports for coupling to first and second...
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7418624 |
Hot standby system
Consistency of a shared disk is secured in system switching in a hot standby system. In the standby system in which an active computer and standby computer share the shared disk, when a write I/O...
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7415634 |
Method for fast system recovery via degraded reboot
A system and method for fast system recovery that bypasses diagnostic routines by disconnecting failed hardware from the system before rebooting. Failed hardware and hardware that will be affected...
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7401254 |
Apparatus and method for a server deterministically killing a redundant server integrated within the same network storage appliance chassis
An apparatus for deterministically killing one of redundant servers integrated into a network storage appliance chassis along with at least one storage controller is disclosed. Each server can...
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7401252 |
Apparatus and method to convert data from a first sector format to a second sector format
An apparatus is disclosed to convert data from a first sector format to a second sector format. The sector format conversion device includes a processor, and microcode which causes the processor to...
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7386760 |
Method, system, and program for error handling in a dual adaptor system where one adaptor is a master
Provided is a method, system, and program for processing Input/Output (I/O) requests to a storage network including at least one storage device and at least two adaptors, wherein each adaptor is...
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7380163 |
Apparatus and method for deterministically performing active-active failover of redundant servers in response to a heartbeat link failure
An apparatus is disclosed for deterministically performing active-active failover of redundant servers in response to a failure of a link on which each server provides a heartbeat to the other...
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7370147 |
Disk array device and control method therefor
A disk array device having a dual controller for executing data input/output processing for disk drives in response to a data input/output request from a host computer. Each controller constituting...
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7353434 |
Method for controlling storage system
A storage system including: channel control portions each including a circuit board on which a file access processing portion for receiving file-by-file data input/output requests sent from...
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7330996 |
Twin-tailed fail-over for fileservers maintaining full performance in the presence of a failure
A method for maintaining full performance of a file system in the presence of a failure is provided. The file system having N storage devices, where N is an integer greater than zero and N primary...
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7328324 |
Multiple mode controller method and apparatus
A data storage system configured for efficient operation in a single controller mode and to facilitate an upgrade from single controller operation to dual redundant active-active controller...
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7308604 |
Real-time fail-over recovery for a media area network
A media area network includes a storage system having at least one storage device for storing digitized information. A host bus adapter provides a link between the storage system and a host system...
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7302607 |
Two node virtual shared disk cluster recovery
A method for recovery in a two-node data processing system is provided wherein each node is a primary server for a first nonvolatile storage device and for which there is provided shared access to...
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7302606 |
Fault recovery method and a storage controller in an information processing apparatus
In a shared bus connection scheme or an individual path connection scheme, a fault caused at a part of a system affects the same in its entirety. Also, these schemes do not permit the determination...
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7293195 |
System and method for coordinated bringup of a storage appliance in a cluster configuration
A system and method for coordinated bringup of a storage appliance in a storage appliance cluster. The repaired storage appliance, during its initialization, sets a variety of state values in a...
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7290168 |
Systems and methods for providing a multi-path network switch system
A storage virtualization environment is provided that includes a system for providing multi-path communications in a virtualization storage environment for managing a virtual volume of data. The...
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7284151 |
Conditional data access after database system failure
A method of operation within a data processing system that includes a plurality of processing nodes each having access to a set of shared resources. Failure of one of the processing nodes is...
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7266719 |
Host system for mass storage business continuance volumes
A mass storage business continuance time maker function host system that allows one or more MVS mainframe hosts to have the time to: establish business continuation volumes to mirror the standard...
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7246260 |
Methods and systems for implementing shared disk array management functions
Multiple Array Management Functions (AMFs) are connected to multiple redundancy groups over a storage area network (SAN), such as a fiber-channel based SAN. The multiple AMFs share management...
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7243258 |
Network system having function of changing route upon failure
A network system includes a plurality of networks, a first internetwork apparatus having a plurality of first ports each connected to the plurality of networks, a second internetwork apparatus...
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7219256 |
Method and apparatus for controlling data storage within a data storage system
A host data processing system includes a data storage system having a cache memory and a back end storage. In response to a detection of an event failure during an input/output (I/O) request from...
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7216258 |
Method and apparatus for recovering from a non-fatal fault during background operations
A method and apparatus for reinitializing firmware in the event of a fault in a storage area network comprising at least one storage controller having programmable memory and RAM, said at least one...
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7206963 |
System and method for providing switch redundancy between two server systems
A system and method for providing switch redundancy in a computer network comprises two or more separate servers that are connected together to allow the servers to operate as one complete system...
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7203862 |
Methods for controlling storage devices controlling apparatuses
A storage device controller including: channel control portions each including a circuit board on which a file access processing portion for receiving file-by-file data input/output requests sent...
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7171524 |
Storage control system and control method for storage control which suppress the amount of power consumed by the storage control system
One or more master CHN 21 AM and one or more back-up CHN 21 AC are provided. In each of the one or more back-up CHNs 21 AC, the I/O processor 504 is in a power on state, and the NAS processor...
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7159150 |
Distributed storage system capable of restoring data in case of a storage failure
A collective storage system and method for restoring data in the system after a failure in the system. The system includes multiple storage nodes that are interconnected by a network and store data...
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7143311 |
Interrupt handler for a data processor
A data processor formed on a single integrated circuit and capable of connection to an external memory, the data processor including: a central processing unit; a local memory including a debug...
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7124224 |
Method and apparatus for shared resource management in a multiprocessing system
In a multiprocessor, access to shared resources is provided by a semaphore control mechanism, herein disclosed. The semaphore control mechanism provides for a high degree of programmable firmware...
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7107332 |
Storage controller and computer system for managing information related to connection port
A storage controller determines a difference between a control table containing fiber channel port configuration of an upper node device and security information, and information fetched from a...
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7103808 |
Apparatus for reporting and isolating errors below a host bridge
A method, apparatus, and computer instructions for reporting errors occurring in a data processing system. Responsive to an error occurring in a host bridge in the data processing system, a...
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7100074 |
Storage system, and control method, job scheduling processing method, and failure handling method therefor, and program for each method
An arbitrary number of a plurality of physical devices are mapped to each logical device provided for a host as a working unit, while considering a priority given to each logical device, and with...
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7093154 |
Critical adapter local error handling
Adapters, which provide message communications capabilities in a multinode data processing network, are provided with a mechanism for indicating critical errors from which recovery may ultimately...
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7082524 |
I/O bus abstraction for a cluster interconnection fabric
A host is coupled to a cluster interconnection fabric which includes a fabric-attached I/O controller. The host includes a processor, a memory coupled to the processor and an operating system. The...
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7055061 |
Normal and standby modes for duplicated field apparatus control system
In a field apparatus control system, one of duplicated main control units and one of communication control units constitute a normal system, and the other of the duplicated main control units and...
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