摘要:
A high speed fabric is provided and is partitioned into sub-fabrics for host adapter traffic and device adapter traffic. A high-speed switch includes an expander for host adapter traffic and an expander for device adapter traffic. The high-speed switch also includes a plurality of connectors, where each connector is partitioned into dual interfaces. For each connector, one interface is connected to the host adapter traffic expander and the other interface is connected to the device adapter traffic expander. Blades are provided with one or more connectors, where each connector is partitioned into dual interfaces for host adapter traffic and device adapter traffic. The blades may be any combination of processor blades, boot drive enclosure blades, switched bunch of disks enclosure blades, and/or integrated RAID controller disk enclosure blades.
摘要:
A high speed fabric is provided and is partitioned into sub-fabrics for host adapter traffic and device adapter traffic. A high-speed switch includes an expander for host adapter traffic and an expander for device adapter traffic. The high-speed switch also includes a plurality of connectors, where each connector is partitioned into dual interfaces. For each connector, one interface is connected to the host adapter traffic expander and the other interface is connected to the device adapter traffic expander. Blades are provided with one or more connectors, where each connector is partitioned into dual interfaces for host adapter traffic and device adapter traffic. The blades may be any combination of processor blades, boot drive enclosure blades, switched bunch of disks enclosure blades, and/or integrated RAID controller disk enclosure blades.
摘要:
An apparatus, system, and method are disclosed for integrating redundant array of independent disk (“RAID”) storage within a blade center. A plurality of mutually autonomous storage subsystems mount within the blade center through a switch. Each storage subsystem includes a storage module comprising a plurality of storage devices and a RAID controller. A server blade mounted within the blade center may access a first storage subsystem through a switch module. The switch module is a non-blocking, cross-point switch. In one embodiment, the switch module restricts the server blade's access to a second storage subsystem.
摘要:
An apparatus, system, and method are disclosed for integrating redundant array of independent disk (“RAID”) storage within a blade center. A plurality of mutually autonomous storage subsystems mount within the blade center through a switch. Each storage subsystem includes a storage module comprising a plurality of storage devices and a RAID controller. A server blade mounted within the blade center may access a first storage subsystem through a switch module. The switch module is a non-blocking, cross-point switch. In one embodiment, the switch module restricts the server blade's access to a second storage subsystem.
摘要:
A system and method for verifying integrity of data signals communicated from a data transmit device to a receive device over a communications channel of limited bandwidth. The method comprising steps of: a) detecting instances of idle data transmit activity at the transmit device; b) accumulating data integrity information for data transmitted over the communication channel between detected idle transmit instances, the accumulating being performed by data integrity verifier devices at both transmit and receive devices; c) communicating accumulated data integrity information for data transmitted since a last detected idle data transmit instance during a current detected idle data transmit instance; and, d) verifying accumulated data integrity information communicated over the channel at the receiver device. The system and method of the invention may be used to provide intermediate data integrity checks when communication of packets belonging to a stream is interrupted without compromising bandwidth utilization. Moreover, the system and method of the invention may be used to provide data integrity verification for data communicated over two or more communications channels between instances of detected idle transmit states.
摘要:
Disclosed is a system for processing read/write transactions from a plurality of agents over a bus. The bridge includes at least one request buffer for each agent in communication with the bridge. The request buffer for an agent buffers transactions originating from that agent. The bridge further includes a return buffer for each agent in communication with the bridge. The return buffer for an agent buffers return data in connection with a transaction. Address translation circuitry is in communication with the bus and request and return buffers. The address translation circuitry locates a request buffer to queue the transaction, such that a transaction is stored in the request buffer corresponding to the agent that originated the transaction. Further, the address translation circuitry stores read return data for a read transaction in the return buffer corresponding to the agent originating the transaction.
摘要:
Disclosed is a bridge system for processing read and write transactions over a bus in which in a preferred embodiment continuous read data obtained from a target device in a number of separate read operations over a secondary bus may be gathered by the bridge and assembled into a larger block of data before forwarding the data over the primary bus to the requesting agent. As a consequence, the transmission of optimal, address boundary-aligned bursts of read data over the primary bus may be increased and conversely, the transmission of fractionated, nonaligned read data over the primary bus may be reduced. Because each agent is assigned particular buffers, read data may be gathered concurrently in the assigned bridge buffers without assertion of a read request by one agent causing the flushing of the data being gathered for a different agent. In a similar manner, in delayed write operations, the write data may also be gathered from several write operations and assembled into an address boundary-aligned block of write data before the bridge circuit forwards the write data to the target device.
摘要:
A method and system for controlling access to a bus for transferring data in the form of multibyte data streams. Data transfer agents are coupled to and request access to the bus to transfer data thereon. The system for controlling access to the bus comprises a bus arbiter responsive to the access requests of the data transfer agents, granting access to the bus to one data transfer agent at a time. A data length counter accumulates, during the grant of access, signals indicating the length of the data transferred between the bus and the data transfer agent. The data length counter indicates completion of the transfer of a predetermined length of data, and bus arbiter logic responds to the data length counter indicating the transfer completion, causing the bus arbiter to terminate the grant of access to the data transfer agent. The control of access to the bus is thus based on the precise measurement of the length of the transferred data, rather than on timers.
摘要:
A system for limiting fracturing of write data by a PCI bus adapter which queues operation commands in a command queue. The write data is in the form of bursts comprising a plurality of contiguous words. Fracture detection logic senses fracturing of the write data. A bus arbiter is responsive to the sensed fracturing of write data by the target, and blocks access to the PCI bus. Queue level detection logic is employed, subsequent to the blocking, to monitor completion of the queued operation commands of the PCI bus target. The bus arbiter is then responsive to the queue level detection logic indicating that the PCI bus target has completed enough operations that a predetermined number (such as one) of the operation commands remain queued at its command queue, and grants access to the PCI bus to complete the burst write operation without fracturing.
摘要:
Disclosed is a system for handling errors. A system managed by a processor processes an error in the system. The system then generates an interrupt to the processor indicating that an error occurred and executes an error mode before the processor interprets the interrupt. As part of the error mode, the system prevents data from transferring between the system and the processor and processes a read request from the processor to the system by returning data to the processor unrelated to the requested data. The processor would then process the interrupt indicating the error and execute a diagnostic mode to diagnose the error in the system.