Identify Device [Ech] - Hitachi DK23DA-30F - 30 GB Hard Drive Specifications

6.3.2.3.1 Identify Device [ECh]

The Identify Device command enables the host to receive parameter information from the device.
When the command is issued, the device sets BSY, stores the required parameter information in the
sector buffer, sets DRQ, and generates an interrupt. The host then reads the information from the
sector buffer through the Data Register. The parameter words are defined in Table 6.5 and 6.6.
All reserved bits or words shall be zero.
Word
0 General configuration
1 Number of logical cylinders
2 Specific configuration
3 Number of logical heads
4 - 5 Retied
6 Number of logical sectors per logical track
7-9 Vendor specific
10-19 Serial number (20 ASCII characters)
20 Buffer type
0000h = Not specified
0002h = Dual port multi-sector buffer
0003h = Dual port multi-sector buffer with read caching capability
21 Buffer size in 512 byte increments (0000h=not specified)
22 Number of ECC bytes passed on READ/WRITE LONG commands
23-26 Firmware revision(8 ASCII Characters)
27-46 Model number(40 ASCII Characters)
DK23DA-40F: "HITACHI_DK23DA-40"
DK23DA-30F: "HITACHI_DK23DA-30"
DK23DA-20F: "HITACHI_DK23DA-20"
DK23DA-10F: "HITACHI_DK23DA-10"
47 Number of sectors on multiple commands
Bit 15 - 8
Bit 7 - 0
48 Double word I/O not supported
0000h = cannot perform double word I/O
0001h = can perform double word I/O
49 Capabilities
Bit 15 – 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7 – 0
K6602705
Rev.3
08.20.01
Table 6.5 Identify Device Information
Description
80h (fixed)
Number of sectors on multiple command
0 = Reserved
1 = Standby timer values as specified in ATA-2
specification supported
0 = Reserved
1 = IORDY supported
1 = IORDY can be disabled
1 = LBA supported
1 = DMA supported
Vendor Specific
0001h = Single port single buffer
- 38 -
Value
(HEX.)
045Ah
See table 6.6
C837h
See table 6.6
0000h
See table 6.6
0003h
DK23DA-20F/
10F: 0400h
DK23DA-40F/
30F: 1000h
0004h
8010h
0000h
0B00h