System using a single host to receive and redirect all file access commands for shared data storage device from other hosts on a network
DC CAFCFirst Claim
1. A networked system for providing access to user data while preserving the data integrity of the user data, comprising:
- a data storage device comprising the user data;
a plurality of hosts coupled at a device level to the data storage device by way of a digital network; and
a resource lock providing exclusive access to the data storage device to one of the plurality of hosts at a time;
wherein commands to the data storage device originating from any one of the plurality of hosts are directed to a first host, the first host redirecting all such commands to the data storage device.
5 Assignments
Litigations
0 Petitions
Accused Products
Abstract
Access by multiple hosts, such as computers, to a data storage device by way of a network while maintaining data integrity. In one embodiment, a method for accessing the storage device includes acquiring a resource “lock” that provides exclusive access to one of the hosts at a time. In another embodiment, the file systems of a first and second host provide file system attributes stored in a storage device to provide mutually exclusive access for each host to free blocks of the device. In another embodiment, a networked system contains a first host having exclusive direct access to a storage device over a digital network. A second host requiring access to the storage device communicates with the first host by way of the digital network. File access requests generated by the second host are transferred by a redirection filter driver within the second host to the first host.
-
Citations
29 Claims
-
1. A networked system for providing access to user data while preserving the data integrity of the user data, comprising:
-
a data storage device comprising the user data; a plurality of hosts coupled at a device level to the data storage device by way of a digital network; and a resource lock providing exclusive access to the data storage device to one of the plurality of hosts at a time; wherein commands to the data storage device originating from any one of the plurality of hosts are directed to a first host, the first host redirecting all such commands to the data storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A networked system for providing access to user data while preserving the data integrity of the user data, comprising:
-
a data storage device comprising the user data; a plurality of hosts coupled at a device level to the data storage device by way of a digital network; a resource lock resident on the storage device and providing exclusive access to the data storage device to one of the plurality of hosts at a time; and filter driver software in each of the plurality of hosts, the filter driver software configured to intercept read and write requests generated within each of the plurality of hosts intended for the data storage device and forward such requests to a single unique host of the plurality of hosts.
-
-
16. A networked system for providing access to user data while preserving the data integrity of the user data, comprising:
-
a data storage device comprising the user data; a first host having exclusive direct access to the data storage device by way of a digital network, the first host comprising a local file system coupled with the data storage device; and a second host coupled to the first host by way of the digital network, the second host comprising a redirection filter driver configured to direct a file access request generated by the second host to the data storage device by way of the local file system of the second host instead of a local file system of the first host. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
Specification