The format of the overlay transmitted by the device is described inTable 10.8-9. The restrictions on changing these bits is described in the text following Table 10.8-9. If any of the bit modification restrictions described are violated, the device shall return command aborted.

Table 10.8-9 Device Configuration Overlay data stracture

Word

 

 

 

Content

0

Data structure revision

1

Multiword DMA modes supported

 

15-3

 

Reserved

 

2

 

1

= Multiword DMA mode 2 and below are supported

 

1

 

1

= Multiword DMA mode 1 and below are supported

 

0

 

1

= Multiword DMA mode 0 is supported

2

Ultra DMA

modes supported

 

15-5

 

Reserved

 

5

 

1

= Ultra DMA mode 5 and below are supported

 

4

 

1

= Ultra DMA mode 4 and below are supported

 

3

 

1

= Ultra DMA mode 3 and below are supported

 

2

 

1

= Ultra DMA mode 2 and below are supported

 

1

 

1

= Ultra DMA mode 1 and below are supported

 

0

 

1

= Ultra DMA mode 0 is supported

3-6

Maximum LBA address

7

Command set/feature set supported

 

15-9

 

Reserved

 

8

 

1

= 48-bit Addressing feature set supported

 

7

 

1

= Host Protected Area feature set supported

 

6

 

1

= Automatic acoustic management supported

 

5

 

1

= READ/WRITE DMA QUEUED commands supported

 

4

 

1

= Power-up in Standby feature set supported

 

3

 

1

= Security feature set supported

 

2

 

1

= SMART error log supported

 

1

 

1

= SMART self-test supported

 

0

 

1

= SMART feature set supported

8-254

Reserved

 

 

 

255

Integrity word

 

 

 

15-8

 

Checksum

 

7-0

 

Signature

10.8.45.4.2.1 Word 0: Data structure revision

Word 0 shall contain the value 0001h.

10.8.45.4.2.2 Word 1: Multiword DMA modes supported

Word 1 bits 15:3 are reserved.

Word 1 bit 2 is cleared to disable support for Multiword DMA mode 2 and has the effect of clearing bit 2 in word 63 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. This bit shall not be cleared if Multiword DMA mode 2 is currently selected.

Word 1 bit 1 is cleared to disable support for Multiword DMA mode 1 and has the effect of clearing bit 1 in word 63 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. This bit shall not be cleared if Multiword DMA mode 2 is supported or Multiword DMA mode 1 or 2 is selected.

Word 1 bit 0 shall not be cleared.

Toshiba Corporation Digital Media Network Company

Page 137 of 157

© 2005, Copyright TOSHIBA Corporation All Rights Reserved