Disk drive and method for implementing nonstandard disk-drive commands on a serial ATA interface that only supports standard ATA disk-drive commands

• US 6,895,455 B1
• Filed: 06/26/2002
• Issued: 05/17/2005
• Est. Priority Date: 06/26/2002
• Status: Active Grant

• Current Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Original Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Inventors: Rothberg, Michael S.
• Primary Examiner(s): Gaffin, Jeffrey
• Assistant Examiner(s): Nguyen, Mike
• Application Number:
  US10/183,207
• Time in Patent Office: 1,056 Days
• Field of Search: 710/5, 710/8, 710/33, 710/65, 710/74, 710/105, 710/104, 711/154, 711/156
• US Class Current: 710/74
• 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 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0674 Disk device

Abstract

A disk drive is disclosed that is responsive to standard disk-drive commands associated with disk-drive operations and to nonstandard disk-drive commands required for disk drive manufacture and quality testing. The disk drive includes a disk, a head actuated radially over the disk, and a disk control system. The disk control system responds to disk-drive commands and accesses data storage locations on the disk through the head. A serial ATA interface couples the disk control system to a host computer. The serial ATA interface is configured to transfer standard disk-drive commands from the host computer to the disk control system and is configured to not transfer nonstandard disk-drive commands from the host computer to the disk control system. The extracting means extracts a nonstandard disk-drive command that is embedded within a data block accessed using a standard disk-drive command and provides the extracted nonstandard disk-drive command to the disk control system.

Claims

1. A disk drive connectable to a host computer, and responsive to standard disk-drive commands associated with disk-drive operations and to nonstandard disk-drive commands required for disk manufacture and quality testing, the disk drive comprising;

a disk;

a head actuated radially over the disk;

a disk control system for responding to the standard and nonstandard disk-drive commands and for accessing data storage locations on the disk through the head, wherein the standard disk drive commands include a Self Monitoring Analysis and Reporting Technology (SMART) write-log command;

a serial ATA interface for coupling the disk control system to the host computer when the disk drive is connected to the host computer, wherein the serial ATA interface is configured to transfer standard disk-drive commands from the host computer to the disk control system and is configured to not transfer non-standard disk-drive commands from the host computer to the disk control system; and

means for extracting a nonstandard disk-drive command that is embedded within a data block accessed using a SMART write-log command, and providing the extracted nonstandard disk-drive command to the disk control system.

2. A disk drive as defined in claim 1, wherein the data block includes an action code field.

3. A disk drive as defined in claim 2, wherein the data block further includes at least one parameter field.

4. A disk drive as defined in claim 1, wherein

the nonstandard disk-drive commands comprise a first command subset and a second command subset;

the first command subset includes a command to enable response to the second command subset; and

the disk control system is responsive to an extracted nonstandard disk-drive command from the second command subset only after the enable command is received by the disk drive from the host computer.

5. A disk drive as defined in claim 4, wherein the first command subset includes a status command.

6. A disk drive as defined in claim 4, wherein the first command subset includes a command to determine whether the disk drive has received the enable command and the disk control system is responsive to an extracted nonstandard disk-drive command from the second command subset.

7. In a disk drive connected to a host computer, and responsive to standard disk-drive commands associated with disk-drive operations and to nonstandard disk-drive commands required for disk-drive manufacture and quality testing, the disk drive including a disk, a head actuated radially over the disk, a disk control system for responding to disk-drive commands and for accessing data storage locations on the disk through the head, and a serial ATA interface for coupling the disk control system to the host computer when the disk drive is connected to the host computer, wherein the serial ATA interface is configured to transfer standard disk-drive commands from the host computer to the disk control system and is configured to not transfer nonstandard disk-drive commands form the host computer to the disk control system, and the standard disk drive commands include a Self Monitoring Analysis and Reporting Technology (SMART) write-log command, a method for transmitting a nonstandard disk-drive command to the disk drive, comprising:

embedding a nonstandard disk-drive command within a data block accessible using a SMART write-log command;

transmitting the SMART write-log command from the host computer through the serial ATA interface to the disk control system, wherein the SMART write-log command causes the data block to be transformed from the host computer to the disk control system;

extracting the nonstandard disk-drive command that is embedded within the data block; and

providing the extracted nonstandard disk-drive command to the disk control system.

8. A method for transmitting a nonstandard disk-drive command to a disk drive as defined in claim 7, wherein the data block includes an action code field.

9. A method for transmitting a nonstandard disk-drive command to a disk drive as defined in claim 8, wherein the data block further includes at least one parameter field.

10. A method for transmitting a nonstandard disk-drive command to a disk drive as defined in claim 7, wherein

the nonstandard disk-drive commands comprise a first command subset and a second command subset;

the first command subset includes a command to enable response to the second command subset; and

the disk control system is responsive to an extracted nonstandard disk-drive command from the second command subset only after the enable command is received by the disk drive from the host computer.

11. A method for transmitting a nonstandard disk-drive command to a disk drive as defined in claim 10, wherein the first command subset includes a status command.

12. A method for transmitting a nonstandard disk-drive command to a disk drive as defined in claim 10, wherein the first command subset includes a command to determine whether the disk drive has received the enable command and the disk control system is responsive to an extracted nonstandard disk-drive command from the second command subset.

13. A disk drive, connectable to a host computer, having a host interface for receiving data blocks and commands from the host, the disk drive comprising:

a control system for processing the received host commands and data blocks;

the control system comprising;

first means for processing a first subset of the received host commands, wherein the first subset of host commands is defined in an industry standard and includes a Self Monitoring Analysis and Reporting Technology (SMART) write-log command;

second means for processing a second subset of the received host commands, wherein the second subset of host commands is not defined in the industry standard; and

third means for processing a received SMART write-log command to enable the second means to process the second subset of received host commands.

14. A disk as defined in claim 13, wherein a received command of the second subset of host commands is embedded in a data block associated with a received command of the first subset of host commands.

15. A disk drive connectable to a host computer, having a host interface for receiving data blocks and commands from the host, the disk drive comprising:

a control system for processing the received host commands and data blocks;

the control system comprising;

first means for processing a first subset of the received host commands, wherein the first subset of host commands is defined in an industry standard;

second means for processing a second subset of the received host commands, wherein the second subset of host commands is not defined in the industry standard; and

third means for processing one of the first subset of received host commands to enable the second means to process the second subset of received host commands, wherein the third means, in response to a first enabling command, generates a security challenge code for transmission in a data block to host computer.

16. A disk as defined in claim 15, wherein the host computer, in response to the security code, generates a security validation code for transmission to the disk drive and for processing by the third means.

17. A disk drive as defined in claim 16, wherein the security challenge code is randomly generated by the third means, and the security validation code is generated by the host computer using a security algorithm applied to the security challenge code.