Network-attached storage system, device, and method supporting multiple storage device types

• US 7,237,021 B2
• Filed: 04/04/2003
• Issued: 06/26/2007
• Est. Priority Date: 04/04/2003
• Status: Active Grant

• Current Assignee: Hitachi Vantara, LLC (Hitachi, Ltd.)
• Original Assignee: Bluearc UK Ltd. (Hitachi, Ltd.)
• Inventors: Clarkson, Neil A., Barrall, Geoffrey S., Penny, Brett A.
• Primary Examiner(s): Nguyen; Phuoc H.
• Application Number:
  US10/407,145
• Publication Number:
  US 20040199515A1
• Time in Patent Office: 1,544 Days
• Field of Search: 709/215, 709/216, 709220-226, 709/223, 711/111, 711/150, 711/170, 711/112
• US Class Current: 709/223
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0632 by initialisation or re-initialisation of storage systems
• CPC Class Codes: G06F 3/0661 Format or protocol conversion arrangements
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• 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]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A network-attached system, device, and method supports storage devices having a plurality of storage device types, such as Fibre Channel storage devices, ATA storage devices, serial attached SCSI storage devices, serial ATA storage devices, and solid stage storage devices. Each storage device having a different storage device type is associated with a set of management rules. The management rules may includes rules for such things as identifying the dedicated storage device, configuring the dedicated storage device, sending disk protocol messages to the dedicated storage device, handling disk protocol message received from the dedicated storage device, and handling error and exception conditions.

Claims

1. A method for supporting storage devices having different storage device types by a network storage server in a network-attached storage system, the method comprising:

maintaining a set of management rules for each of a plurality of dedicated storage devices that are in communication with the network storage server using a disk control protocol, the plurality of dedicated storage devices being of a plurality of storage device types, each dedicated storage device of a different storage device type having a different set of management rules; and

managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type wherein such managing includes sending disk control protocol messages to the dedicated storage devices at least some of the disk control protocol messages formatted differently for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

2. The method of claim 1, wherein the plurality of storage device types includes a plurality of

a Fibre Channel storage device type;

an ATA storage device type;

a serial attached SCSI storage device type;

a serial ATA storage device type; and

a solid state storage device type.

3. The method of claim 1, wherein the plurality of dedicated storage devices include:

at least one Fibre Channel storage device; and

at least one ATA storage device.

4. The method of claim 1, wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

receiving an indication that a new dedicated storage device is present; and

using the sets of management rules for the various dedicated storage devices and storage device types to identify the new dedicated storage device.

5. The method of claim 1, wherein each dedicated storage device having a different storage device type is configured differently, and wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

configuring each different dedicated storage device according to the set of management rules for the dedicated storage device and storage device type.

6. The method of claim 1, wherein each dedicated storage device having a different storage device type has a maximum queue size, and wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

determining a number of disk control protocol messages that can be queued to each dedicated storage device according to the set of management rules for each dedicated storage device and storage device type.

7. The method of claim 1, wherein each dedicated storage device having a different storage device type has a preferred stripe size, and wherein managing each different dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

writing data to each dedicated storage device using the preferred stripe size for the dedicated storage device according to the set of management rules for each dedicated storage device and storage device type.

8. The method of claim 1, wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

receiving disk control protocol messages from the dedicated storage devices; and

processing the disk control protocol messages from different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

9. The method of claim 1, wherein each dedicated storage device having a different storage device type has different error and exception handling rules, and wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

handling errors and exceptions for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

10. A method for supporting storage devices having different storage device types by a network storage server in a network-attached storage system, the method comprising:

maintaining a set of management rules for each of a plurality of dedicated storage devices that are in communication with the network storage server using a disk control protocol, the plurality of dedicated storage devices being of a plurality of storage device types, each dedicated storage device of a different storage device type having a different set of management rules, each dedicated storage device of a different storage device type also having a maximum queue size; and

managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type, wherein such managing includes determining a number of disk control protocol messages that can be queued to each dedicated storage device according to the set of management rules for each dedicated storage device and storage device type.

11. The method of claim 10, wherein the plurality of storage device types includes a plurality of:

a Fibre Channel storage device type;

an ATA storage device type;

a serial attached SCSI storage device type;

a serial ATA storage device type; and

a solid state storage device type.

12. The method of claim 10, wherein the plurality of dedicated storage devices include:

at least one Fibre Channel storage device; and

at least one ATA storage device.

13. The method of claim 10, wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

receiving an indication that a new dedicated storage device is present; and

using the sets of management rules for the various dedicated storage devices and storage device types to identify the new dedicated storage device.

14. The method of claim 10, wherein each dedicated storage device having a different storage device type is configured differently, and wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

configuring each different dedicated storage device according to the set of management rules for the dedicated storage device and storage device type.

15. The method of claim 10, wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

sending disk control protocol messages to the dedicated storage devices, at least some of the disk control protocol messages formatted differently for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

16. The method of claim 10, wherein each dedicated storage device having a different storage device type has a preferred stripe size, and wherein managing each different dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

writing data to each dedicated storage device using the preferred stripe size for the dedicated storage device according to the set of management rules for each dedicated storage device and storage device type.

17. The method of claim 10, wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

receiving disk control protocol messages from the dedicated storage devices; and

processing the disk control protocol messages from different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

18. The method of claim 10, wherein each dedicated storage device having a different storage device type has different error and exception handling rules, and wherein managing each dedicated storage device using the set of management rules for that dedicated storage device and storage device type further comprises:

handling errors and exceptions for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

19. Apparatus for supporting storage devices having different storage device types in a network-attached storage system, the apparatus comprising:

a set of management rules for each of a plurality of dedicated storage devices, the plurality of dedicated storage devices being of a plurality of storage device types, each dedicated storage device of a different storage device type having a different set of management rules; and

a disk controller adapted to manage each dedicated storage device using the set of management rules for that dedicated storage device and storage device type, wherein such managing includes sending disk control protocol messages to the dedicated storage devices, at least some of the disk control protocol messages formatted differently for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type.

20. Apparatus of claim 19, wherein the plurality of storage device types includes a plurality of:

a Fibre Channel storage device type;

an ATA storage device type;

a serial attached SCSI storage device type;

a serial ATA storage device type; and

a solid state storage device type.

21. Apparatus of claim 19, wherein the plurality of dedicated storage devices include:

at least one Fibre Channel storage device; and

at least one ATA storage device.

22. Apparatus of claim 19, wherein the disk controller is further adapted for at least one of:

identifying a new dedicated storage device using the sets of management rules for the various dedicated storage devices and storage device types;

configuring each different dedicated storage device according to the set of management rules for the dedicated storage device and storage device type, wherein each dedicated storage device having a different storage device type is configured differently;

determining a number of disk control protocol messages that can be queued to each dedicated storage device according to the set of management rules for each dedicated storage device and storage device type, wherein each dedicated storage device having a different storage device type has a maximum queue size;

writing data to each dedicated storage device using a preferred stripe size for the dedicated storage device according to the set of management rules for each dedicated storage device and storage device type;

processing disk control protocol messages received from different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type; and

handling errors and exceptions for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type, wherein each dedicated storage device having a different storage device type has different error and exception handling rules.

23. Apparatus for supporting storage devices having different storage device types in a network-attached storage system, the apparatus comprising:

a set of management rules for each of a plurality of dedicated storage devices, the plurality of dedicated storage devices being of a plurality of storage device types, each dedicated storage device of a different storage device type having a different set of management rules; and

a disk controller adapted to manage each dedicated storage device using the set of management rules for that dedicated storage device and storage device type, wherein such managing includes determining a number of disk control protocol messages that can be queued to each dedicated storage device according to the set of management rules for each dedicated storage device and storage device type.

24. Apparatus of claim 23, wherein the plurality of storage device types includes a plurality of:

a Fibre Channel storage device type;

an ATA storage device type;

a serial attached SCSI storage device type;

a serial ATA storage device type; and

a solid state storage device type.

25. Apparatus of claim 23, wherein the plurality of dedicated storage devices include:

at least one Fibre Channel storage device; and

at least one ATA storage device.

26. Apparatus of claim 23, wherein the disk controller is further adapted for at least one of:

identifying a new dedicated storage device using the sets of management rules for the various dedicated storage devices and storage device types;

configuring each different dedicated storage device according to the set of management rules for the dedicated storage device and storage device type, wherein each dedicated storage device having a different storage device type is configured differently;

sending disk control protocol messages to the dedicated storage devices, at least some of the disk control protocol messages formatted differently for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type;

writing data to each dedicated storage device using a preferred stripe size for the dedicated storage device according to the set of management rules for each dedicated storage device and storage device type;

processing disk control protocol messages received from different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type; and

handling errors and exceptions for different dedicated storage devices according to the set of management rules for each dedicated storage device and storage device type, wherein each dedicated storage device having a different storage device type has different error and exception handling rules.