Patent ID: 6389459
Filing Date: 2002-05-14
Classification: G06F

Abstract:
A computer system, comprising:a first server computer including a first storage volume; a second server computer including a second storage volume; a communication network connecting said first and second server computers; and a network operating system implemented within said first and second server computers which supports layered drivers; said first server computer including: a file system mirror driver for capturing write requests directed to said first storage volume and transmitting the write requests to said second server computer; and a state filter driver for examining device commands directed to said first storage volume, determining a device state for the first storage volume, and transmitting said device state to said second server computer; and said second server computer including: a storage device; a file system mirror driver for receiving the write requests from said first server computer and directing the write requests to said second storage volume; and a state mirror driver for receiving said device state from said first server computer and storing said device state in said storage device.