It includes an adapter box to securely home the system's power adapter. Starting at state 1400, the configuration supervisor 1100 reads the vendor and adapter ID of the adapter 310 that has been hotly added. The vendor and adapter ID are typically maintained in Read Only Memory on an adapter 310. Novell has offered a set of help modules that creates the interface to the LSL 502.
Plug and Play adapters are able to identify themselves to the computer system after the user installs the adapter on the bus. Plug and Play adapters are also capable of establish the hardware sources that they need for operation. Once this info is equipped to the operating system, the operating system can load the adapter drivers for the adapter that the user had added whereas the system was in a non-powered state. [newline]Plug and Play is used by both Windows ninety five and Windows NT to configure adapter playing cards at boot-time.
The methodology as outlined in declare eight, wherein initiating communications consists of sending a request from a person interface program to a configuration manager related to the mass storage adapter. In the second architectural embodiment, the I/O platform may be any business standard I/O board such as, for example, the 1Q80960RP Evaluation Board which is executing the Ix Works operating system by WindRiver Systems, Inc. In the second architectural embodiment, a hardware device module or adapter driver executes on the motherboard.
6, 7 and eight illustrate a generic process by which different embodiments of the current invention may carry out the recent add and swap of adapters. 6, 7 and 8 describe not solely the new add and swap course of underneath the NetWare Operating System, however additionally they describe the new add and swap process under Windows NT Operating System . 12 via 17 focus on the process by which the recent add and swap process shown in FIGS.
After the resumption of communication to the mass storage adapter 102, the Filter CDM 513 returns completion status to the configuration supervisor 500 . [newline]The configuration supervisor 500 initiates the suspension of I/O to both the NWPA 510 for the mass storage adapters 102 or the LSL 502 and MSM 504 for the community adapter 104. 9 and 10, described under, illustrate intimately the process by which the configuration manager 500 suspends and resumes the I/O to a mass storage adapter and to a network adapter. Starting in state seven-hundred, all devices already working within the chosen canister are located, and activity involving those adapters is suspended. In one embodiment, the SNMP agent 520 or the NetWare User Interface 518 locates all devices, and initiates the request for the suspension for every adapter, such as the adapter 310, on the canister.
A fault tolerant server is helpful for mission critical purposes such because the securities business the place any laptop down time can result in catastrophic financial consequences. A fault tolerant pc will allow for a fault to be isolated and not propagate by way of the system thus providing complete or minimal disruption to persevering with operation. Fault tolerant methods also provide redundant components, such as adapters, so service can continue even when one element fails. The method as outlined in declare 15, wherein the new mass storage adapter is configured to speak with a Peripheral Component Interconnect bus.
A protocol stack is a layered communication architecture, whereby each layer has a properly defined interface. Existing techniques also wouldn't have an interface to regulate the changing or addition of an adapter. While hardware fault tolerance is an important factor of an overall high availability architecture, it is only one piece of the puzzle. Studies show that a significant share of network server downtime is caused by transient faults in the I/O subsystem. These faults may be due, for instance, to the system driver, the device firmware, or hardware which does not correctly handle concurrent errors, and sometimes causes servers to crash or hold. The result's hours of downtime per failure, whereas a system administrator discovers the failure, takes some motion, and manually reboots the server.
ethernet cables is designed to speak via messages with any type of working system executing on the computer. These messages correspond to primitives which allow scorching add and scorching swap of adapters plugged into the motherboard. Current operating techniques do not by themselves present the support users must hot add and swap an adapter.
If the number of requests pending on an adapter just isn't zero, the Filter CDM 513 checks to see if the counter is all the means down to zero . If the counter isn't zero, the Filter CDM 513 decrements the counter . The Filter CDM 513 repeats the method of studying the excellent I/O until there are zero I/Os pending on the mass storage adapter or the counter reaches zero . If the counter reaches zero, the Filter CDM 513 assumes that the mass storage adapter is malfunctioning . The Filter CDM 513 proceeds to close down the mass storage adapter, losing the pending I/Os . After the Filter CDM 513 shuts down the adapter, the Filter CDM 513 relays the standing of the I/O suspension to the configuration manager 500 .
For many companies, these modifications lead to issues over server reliability and manageability, significantly in gentle of the increasingly important role of server-based purposes. Referring to the state 910, the configuration manager 500 assigns the variable “board_num” the value of zero. The configuration supervisor 500 makes use of the variable “board_num” when requesting information from the NetWare Operating System driver configuration tables. A driver configuration desk describes what NetWare knows a couple of specific driver and the driving force's adapter. At state 918, the configuration manager 500 calls the NetWare Operating System to request the configuration table of the “board_num” logical slot.