摘要:
Aspects of increasing the quality and reliability of desktop class storage disks in enterprise storage applications are described. The aspects include monitoring a number of idle states and busy states in a disk drive, and limiting performance of read/write commands by the disk drive based on whether a sufficient number of idle states has been monitored to avoid exceeding a duty cycle rating of the disk drive.
摘要:
A method and system for mapping a node topology is disclosed. The node topology is based on a computer system comprised of a high performance acyclic serial bus and a plurality of nodes coupled to the acyclic serial bus. Each node further includes an identification packet. The mapping topology establishes a root node based upon information found in each identification packet and establishes at least one branch node among the nodes based on the information. Next, the topology mapping method selects a first available branch node among the available branch nodes based on the information. The system then identifies any of the nodes that are child nodes to the first available branch node. Upon identifying all child nodes of the branch node, the system selects a next available branch node based upon the information. The processing continues until the root node is processed as a branch node.
摘要:
A method and system for determining the maximum number of cable segments between all possible node to node paths on a high performance serial bus. The method for determining the maximum cable hops on the serial bus, which is acyclic and based upon the IEEE 1994 standard, consists of traversing a direct path between two nodes via the parent links. Further, the number of traversed paths is reduced from all possible node-to-node paths to only leaf-to-leaf node paths and leaf-to-root node paths for efficiently identifying the maximum number of cable segments between any two nodes within the serial bus.
摘要:
A SCSI computer system is provided whereby a host computer gains access to a targeted but non-local peripheral device, which device or devices are individually responsive to either SCSI or non-SCSI commands, by sending SCSI commands via a SCSI bus to a connected SCSI target computer which emulates the targeted peripheral device local to the SCSI target computer, whether the targeted peripheral device is responsive to only SCSI or only non-SCSI commands, to cause the targeted peripheral device to carry out the initial SCSI commands.
摘要:
A redundant error-detecting addressing code for use in a cache memory. A directory converts logical data addresses to physical addresses in the cache where the data is stored in blocks. The blocks are expanded to include redundant addressing information such as the logical data address and the physical cache address. When a block is accessed from the cache, the redundant addressing is compared to the directory addressing information to confirm that the correct data has been accessed.
摘要:
A disk drive receives a request to write at least one block of a first block size, wherein the disk drive is configured to store blocks of a second block size that is larger in size than the first block size, and wherein the disk drive stores via emulation a plurality of emulated blocks of the first block size in each block of the second block size. The disk drive generates a read error, in response to reading a selected block of the second block size in which the at least block of the first block size is to be written via the emulation. The disk drive performs a destructive write of selected emulated blocks of the first block size that caused the read error to be generated. The disk drive writes the at least one block of the first block size in the selected block of the second block size. The disk drive sends a notification to indicate the performing of the destructive write.
摘要:
A disk drive receives a request to write at least one block of a first block size, wherein the disk drive is configured to store blocks of a second block size that is larger in size than the first block size, and wherein the disk drive stores via emulation a plurality of emulated blocks of the first block size in each block of the second block size. The disk drive generates a read error, in response to reading a selected block of the second block size in which the at least block of the first block size is to be written via the emulation. The disk drive performs a destructive write of selected emulated blocks of the first block size that caused the read error to be generated. The disk drive writes the at least one block of the first block size in the selected block of the second block size. The disk drive sends a notification to indicate the performing of the destructive write.
摘要:
Failover of blade servers in a data center including powering off a failing blade server by a system management server through a blade server management module (‘BSMM’) managing the failing blade server, the failing blade server characterized by a machine type, one or more network addresses, and one or more storage addresses, the addresses being virtual addresses; identifying, by the system management server from a pool of standby blade servers, a replacement blade server, the replacement blade server managed by a BSMM; assigning, by the system management server through the BSMM managing the replacement blade server, the one or more network addresses and the one or more storage addresses of the failing blade server to the replacement blade server, including enabling in the replacement blade server the assigned addresses; and powering on the replacement blade server by the system management server through the BSMM managing the replacement blade server.
摘要:
Failover of blade servers in a data center including powering off a failing blade server by a system management server through a blade server management module (‘BSMM’) managing the failing blade server, the failing blade server characterized by a machine type, one or more network addresses, and one or more storage addresses, the addresses being virtual addresses; identifying, by the system management server from a pool of standby blade servers, a replacement blade server, the replacement blade server managed by a BSMM; assigning, by the system management server through the BSMM managing the replacement blade server, the one or more network addresses and the one or more storage addresses of the failing blade server to the replacement blade server, including enabling in the replacement blade server the assigned addresses; and powering on the replacement blade server by the system management server through the BSMM managing the replacement blade server.
摘要:
The peripheral bus connector for improved aggregation of resources of a device on the peripheral bus includes a plurality of aggregation pins, in addition to the pins according to the peripheral bus standard. Signals from a controller on an extended peripheral bus adapter sends and receives signals in addition to standard signals of the peripheral bus through the aggregation pins. The aggregated device is hidden from third parties, and its existence is known only to the controller on the extended peripheral bus adapter. In this manner, resources are aggregated across a peripheral bus without needing the addition of another controller and without the need to redefine standard peripheral bus signals. In addition, standard peripheral bus adapters may still be used in the connector if resource aggregation is not desired.