Identify Device [Ech] - Hitachi DK23EB - Travelstar Series 20 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 Retired
6 Number of logical sectors per logical track
7-9 Vendor specific
10-19 Serial number (20 ASCII characters)
20 Retired
21 Retired
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)
DK23EB-40: "HITACHI_DK23EB-40"
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
K6602743
Rev.2
02.12.'02
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
- 38 -
Value
(HEX.)
045Ah
See table 6.6
C837h
See table 6.6
0000h
See table 6.6
0003h
0400h
0004h
8010h
0000h
0B00h