Research on virtual disks and fault tolerant paths for Windows
Mengying Wu · Journal of Chongqing University of Posts and Telecommunications · 2007
A redundant path driver for Windows is implemented to tolerate the path failures and improve the system availability.In case of a path failure,PnP(plug and play)manager remove the disk device object of the path that would lead to the upper applications failure to access the disk.A virtual bus and disk device is registered and kept persistently even the path fails,which prevent the upper applications from being interrupted.The bus device driver and disk filter driver is integrated to one driver to simplify the implementation.Due to the virtual disks,the path failure tolerance is achieved in the plug and play environment,and the hierarchical storage device tree is not changed.Compared with MPIO scheme and QDR scheme,it reduces the number of drivers and the complexity,and the device hierarchy is stable.