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Toshiba Corporation Digital Media Network Company
Page 137 of 157
© 2005, Copyright TOSHIBA Corporation All Rights Reserved
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.