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Toshiba Corporation Digital Media Network Company
Page 129 of 153
© 2003, Copyright TOSHIBA Corporation All Rights Reserved
The DEVICE CONFIGURATION IDENTIFY command returns a 512 byte data structure via PIO data-in transfer.
The content of this data structure indicates the selectable commands, modes, and feature sets that the device is
capable of supporting. If a DEVICE CONFIGURATION SET command has been issued reducing the
capabilities, the response to an IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command will reflect the
reduced set of capabilities, while the DEVICE CONFIGURATION IDENTIFY command will reflect the entire set
of selectable capabilities.
The format of the Device Configuration Overlay data structure is shown in Table 11.8-8.
Table 11.8-8 Device Configuration Identify 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
11.8.45.3.1.1 Word 0: Data structure revision
Word 0 shall contain the value 0001h.
11.8.45.3.1.2 Word 1: Multiword DMA modes supported
Word 2 bits 2-0 contain the same information as contained in word 63 of the IDENTIFY DEVICE or IDENTIFY
PACKET DEVICE command response. Bits 15-3 of word 2 are reserved.