201 results about "Disk operating system" patented technology

The present invention provides a system and method for fast restart of a guest operating system executing on a virtual machine operating system in a virtual machine environment. During initialization, the guest operating system saves a set of checkpoint information to persistent storage. Upon detection of an error condition during operation, the guest operating system begins a re-initialization procedure in accordance with an illustrative embodiment of the present invention. During the re-initialization procedure, the guest operating system retrieves the checkpoint information and configures itself using the retrieved information. By utilizing the retrieved information, the guest operating system avoids the need to perform lengthy configuration discovery routines, thereby shortening the re-initialization time substantially.

A video display terminal capable of operating with a graphical user interface such as Windows provides windowing functionality to permit use of popular applications programs resident on a server, without requiring more than application data to be transmitted from the server, and keyboard and mouse information to be transmitted from the terminal to the server. The terminal includes processing means, not fully compatible with personal computer BIOS or disk operating systems and incapable of executing windowing applications locally, adapted to receive windowing information supplied by programs executing on a remotely located application server. The terminal also includes a display for the windowing information supplied by programs executing on the remotely located application server. The invention provides FTP and SNMP capabilities along with a number of user interface enhancements, DHCP and SNMP enhancements. File information is transferred to and from the terminal using a communications protocol. One or more image upgrades are transferred to the terminal from the remotely located application server. Configuration data for the terminal can also be transferred to the terminal from the remotely located application server. The present invention further provides for simultaneously maintaining more than one connection between the terminal and server and establishing more than one virtual machine on the terminal with each virtual machine running an open session. Each virtual machine stops sending and receiving data to and from the server when an application resides in the background session. Each virtual machine commands the server to refresh the data for the application when the application is switched to the foreground.

The present invention includes systems for and methods of visually integrating application windows in a virtual machine environment. Embodiments of the present invention are directed to a system for and method of visually integrating application windows of host and guest operating system in a virtual machine environment in order to reduce difficulties that the users of computers experience in navigating between applications in a virtual machine environment. The present invention accomplishes this by using a composite window list in the virtual machine monitor (VMM) to manage the configuration, the focus, the geometry, the Z-order of the windows across guest and host operating systems, and the arrangement of doppelgangers (virtual application windows, in this case) in a way that allows host and guest application windows to appear integrated in a single display window.

A shared file system may be updated by a non-native operating system writing information to a change file, while a native operating system is in a suspend or hibernation mode; after writing, the non-native operating system is placed in a suspend or hibernation mode and the native system activates and then retrieves the updated information from the change file and writes the updated information to a shared file system. The native operating system returns to a suspend or hibernate state before the non-native operating resumes operation. The updated information may be written as provided by the non-native operating system, or further updated by the native operating system before being written to the shared file system. The change file is created by the native operating system, and may be a reserved portion of the shared file system or may be a separate portion of non-volatile memory. The native and non-native operating systems operate both concurrently and independent of one another; thereby, preventing conflicts during file system updating.