Notes

Ep2055163a4
At state 1030, a request is made to restart the I/O. Next, the configuration manager 500 generates a restart I/O packet . The configuration supervisor 500 sends this packet to the Filter CDM 513. The Filter CDM 513 receives this I/O packet to restart the communication between the mass storage adapter and the adapter driver . The Filter CDM 513 makes a call to NPA_Config to restart the communication between the mass storage adapter and the adapter driver.
14 is a flowchart illustrating the method by which one embodiment of the configuration manager 1100 handles a request to configure a hotly added adapter 310. 14 is a extra detailed description of state 604 proven in FIG. 6 and the state 714 proven in FIG. Once an adapter 310 is added to the computer system, system sources must be allotted for the adapter 310. The configuration supervisor 500 then configures the newly added adapter 310 by writing data to the adapter's configuration house registers.
The Filter CDM 513 then makes a NetWare Operating System name to the NPA_Config routine. The NPA_Config routine halts all communication to a specified mass storage adapter 108 on the NWPA 510. The following sections describe embodiments of the invention operating on the computer systems proven in FIGS. 2 and three beneath NetWare Operating System and Windows NT. As beforehand talked about, FIGS. 6, 7, and 8 illustrate a generic process by which different embodiments of the current invention perform the recent add and swap of gadgets.
In a 3rd architectural embodiment of the invention, the I/O platform is plugged in as an choice to regulate non-intelligent units as are acknowledged by skilled technologists. 15 is one embodiment of a flowchart displaying the process by which an adapter driver locates and initializes a mass storage adapter underneath the Windows NT Operating System in the hot add process shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top-level block diagram exhibiting a fault tolerant pc system of one embodiment of the present invention, including a mass storage adapter and a network adapter.
usb printer cable of described by FIG. 8 is generic to various implementations of the invention. For instance, the method shown in FIG. eight could also be utilized by a fault tolerant laptop system one hundred proven in FIGS. The following description of FIG. 8 focuses on the recent swap of an adapter 310 underneath the NetWare Operating System.
In many instances, data volumes on onerous disk drives become corrupt and have to be repaired when the quantity is mounted. A dismount-and-mount cycle may outcome from the dearth of “hot pluggability” or “hot plug” in current standards-based servers. Hot plug refers back to the addition and swapping of peripheral adapters to an operational computer system.
With demand for 24-hour access to crucial, server-based info sources, deliberate system downtime for system service or growth has turn out to be unacceptable. However, numerous entities have tried to implement the new plug of those adapters to a fault tolerant computer system. One important issue in designing a sizzling plug system is protecting the circuitry contained on the adapter from being short-circuited when an adapter is added to a powered system. Typically, an adapter contains edge connectors that are located on one aspect of the printed circuit board. These edge connectors enable power to transfer from the system bus to the adapter, as nicely as supplying information paths between the bus and the adapter. server spare parts fit right into a slot on the bus on the computer system.
The HSM 508 receives this name and resets the adapter 310. For both suspend and restart, the driving force then proceeds to state 930 which returns successful message to the SNMP agent or NetWare user interface. Adapter Hot Plug with NetWare Operating System FIG. 5 is a block diagram illustrating the system components of the NetWare Operating System and an embodiment of the software components of the invention. A configuration manager 500 is responsible for managing all or a few of the adapters on the PC buses 234 and 236 (FIG. 2), or 250, 252, 254 and 256 (FIG. 3). The configuration supervisor 500 keeps track of the configuration info for each managed adapter situated on the fault tolerant laptop system 100.
Novell has created two interfaces for adapter drivers to communicate with the NetWare Operating Systems (FIGS. 1 and 4). First, Novell has provided the Open Datalink Interface for network drivers. Second, Novell has created the NetWare Peripheral Architecture for mass storage adapters.
eight is one embodiment of a flowchart displaying the process by which a person performs a sizzling swap of an adapter on a fault tolerant pc system, shown in FIGS. 7 is one embodiment of a flowchart showing the process by which a user performs a sizzling add of an adapter on a canister on a fault tolerant pc system, proven in FIG. In one embodiment of the invention, the configuration data is calculated on an ad-hoc foundation. In another implementation of the invention, the configuration data is maintained in a template. The template relies upon the configuration information of an adapter of the same sort positioned on a reference system. The reference system is one other fault tolerant computer system.
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