Method and apparatus for enhancing reliability and scalability of serial storage devices

• US 6,928,509 B2
• Filed: 08/01/2002
• Issued: 08/09/2005
• Est. Priority Date: 08/01/2002
• Status: Active Grant

• Current Assignee: Xyratex Technology Limited (Seagate Technology Holdings Plc)
• Original Assignee: International Business Machines Corporation
• Inventors: Surugucchi, Krishnakumar Rao
• Primary Examiner(s): Myers, Paul R.
• Assistant Examiner(s): PHAN, RAYMOND NGAN
• Application Number:
  US10/211,109
• Publication Number:
  US 20040024950A1
• Time in Patent Office: 1,104 Days
• Field of Search: 710305-306, 710311-317, 710 36- 38, 710 62- 64, 710/74, 710 20- 21, 710/7, 711111-114, 711147-151, 711/168
• US Class Current: 710/316
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

A method, system and apparatus for providing inter-connective access of a plurality of controllers to a plurality of serial storage devices are provided. Serial storage devices are provided with a serial operative connection to a data communication bridge. The bridge is operatively coupled to a plurality of controllers. The plurality of controllers is provided concurrent targeted connections to the set of serial storage devices. In one embodiment, InfiniBand® technology further increases the scalability and enhances the reliability of a data communication system provided with a plurality of (S-ATA) storage devices. The reliability of the data communication system is enhanced because if one controller should fail, another controller may still achieve and maintain access to the plurality of serial storage devices.

Claims

1. A data communication system comprising:

a plurality of storage devices, each with S-ATA port supporting S-ATA protocol;

a plurality of storage controllers, each with a serial port supporting a different protocol than S-ATA protocol; and

a data communication bridge having (a) first ports coupled to respective serial ports of said storage controllers, (b) second ports coupled to respective S-ATA ports of said storage devices, (c) one or more internal buses, (d) a plurality of target channel adapters connected between said one or more buses and respective first ports, said target channel adapters supporting the protocol of said storage controllers, (d) a plurality of S-ATA adapter units connected between said one or more buses and respective second ports, and wherein said one or more buses can interconnect any of said target channel adapters to any of said S-ATA adapter units.

2. A system as set forth in claim 1 wherein said serial ports of said storage controllers are Infiniband (tm) ports and support Infiniband (tm) protocol.

3. A system as set forth in claim 1 further comprising first and second multiport switches, said first switch having third ports connected to said serial ports of one or more of said storage controllers and a fourth port connected to one of said first ports of said bridge, said second switch having fifth ports connected to said serial ports of one or more other of said storage controllers and a sixth port connected to another of said first ports of said bridge, such that any of said serial ports of said storage controllers can be coupled through one of said switches to said bridge.

4. A system as set forth in claim 1 wherein a number of said buses equals or exceeds a number of said second ports to permit simultaneous communication between said storage devices and a like number of storage controllers.

5. A system as set forth in claim 1 wherein each of said S-ATA adapter units comprises S-ATA application, transport, link and physical layers.

6. A system as set forth in claim 4 wherein said one or more buses are local buses and are configured to allow said storage controllers to simultaneously access different storage devices.

7. A data communication system comprising:

a plurality of storage devices, each with an S-ATA port supporting S-ATA protocol;

a plurality of storage controllers, each with a serial port supporting a different protocol than S-ATA protocol; and

a data communication bridge having (a) first ports coupled to respective serial ports of said storage controllers, (b) second ports coupled to respective S-ATA ports of said storage devices, (c) one or more internal buses, (d) a plurality of target channel adapters connected between said one or more buses and respective first ports, said target channel adapters supporting the protocol of said storage controllers, (d) a plurality of S-ATA adapter units connected between said one or more buses and respective second ports; and

wherein said one or more buses can interconnect any of said target channel adapters to any of said S-ATA adapter units; and

first and second multiport switches, said first switch having third ports connected to said serial ports of some of said storage controllers and a fourth port connected to one of said first ports of said bridge, said second switch having fifth ports connected to said serial ports of other of said storage controllers and a sixth port connected to another of said first ports of said bridge, such that any of said serial ports of said storage controllers can be coupled through one of said switches to said bridge.

8. A data communication bridge to interconnect a plurality of storage devices with a plurality of storage controllers, each of said storage devices having an S-ATA port supporting S-ATA protocol, each of said storage controllers having a serial port supporting a different protocol than S-ATA protocol, said bridge comprising:

first ports for coupling to respective serial ports of said storage controllers;

second ports for coupling to respective S-ATA ports of said storage devices;

one or more internal buses;

a plurality of target channel adapters connected between said one or more buses and respective first ports, said target channel adapters supporting the protocol of said storage controllers; and

a plurality of S-ATA adapter units connected between said one or more buses and respective second ports; and

wherein

said one or more buses can interconnect any of said target channel adapters to any of said S-ATA adapter units.

9. A bridge as set forth in claim 8 wherein said serial ports of said storage controllers are Infiniband (tm) ports and support Infiniband (tm) protocol.

10. A bridge as set forth in claim 8 wherein a number of said buses equals or exceeds a number of said second ports to permit simultaneous communication between said storage devices and a like number of storage controllers.

11. A bridge as set forth in claim 8 wherein each of said S-ATA adapter units comprises S-ATA application, transport, link and physical layers.

12. A bridge as set forth in claim 10 wherein said one or more buses are local buses and are configured to allow said storage controllers to simultaneously access different storage devices.