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Pulsar Product Manual, Rev. A 27
4.3.1 Identify Device command
The Identify Device command (command code EC
H
) transfers information about the drive to the host following
power up. The data is organized as a single 512-byte block of data, whose contents are shown in Table 7 on
page 25. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or
vary with the state of the drive. See Section 2.0 on page 3 for default parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA
specification.
Word Description Value
0 General configuration 0040
H
1 Number of logical cylinders (obsolete) 16,383 3FFF
H
2 Specific configuration C837
H
3 Number of logical heads (obsolete) 16 0010
H
4-5 Retired 0000
H
6 Number of logical sectors per logical track (obsolete) 63 003F
H
7–8 Reserved for CompactFlash Association 0000
H
9 Retired 0000
H
10–19 Serial number: (ATA ASCII string padded with spaces (20
H
)) ASCII
20-21 Retired 0000
H
22 Obsolete 0004
H
23–26 Firmware revision (ATA ASCII string padded with spaces (20h)) ASCII
27–46 Model number (ATA ASCII string padded with spaces (20h)) ASCII
47 (Bits 7-0) Maximum number of logical sectors that shall be transferred
per DRQ data block on READ/WRITE MULTIPLE commands. 16
8010
H
48 Reserved for Trusted Computing feature set options 0000
H
49 Capabilities – Standby Timer, IORDY Support, etc 2F00
H
50 Capabilities Continued 4000
H
51 PIO data transfer cycle timing option (Obsolete) 0200
H
52 Retired 0200
H
53 Words 54–58, 64–70 and 88 are valid 0007
H
54 Number of current logical cylinders (Obsolete) 3FFF
H
55 Number of current logical heads (Obsolete) 0010
H
56 Number of current logical sectors per logical track (Obsolete) 003F
H
57–58 Current capacity in sectors (Obsolete) FC10
H
00FB
H
59 Number of LBAs transferred per Read Multiple or Write Multiple.
Sanitize Command Support
0101
H
60–61 Total number of user addressable logical sectors for 28-bit commands
Note: The maximum value allowed in this field is: 0FFFFFFFh. If this
field contains 0FFFFFFFh and the device has user addressable LBAs
greater than or 137GB, then words 100..103 contain the total number
of user addressable LBAs
XXXXXXXX
H
*
62 Obsolete 0000
H
63 Multiword DMA active and modes supported
(see note following this table)
0007
H