Seagate Surveillance HDD Product Manual, Rev. C
23
www.seagate.com
SATA Interface
4.3.1 ZAC Supported Capabilities log page
The Supported Capabilities log page (log 30, pg03h) provides a mechanism for the device which defines support for ZAC.
*Additional detail defined by T13 INCITS BSR 537, Zoned-device ATA Command Set (ZAC) (planned as ISO/IEC 17760-171)
4.3.2 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 on page 21. 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.
The following commands contain drive-specific features that may not be included in the SATA specification.
Offset
Type
Content
112 - 119
QWord
Supported ZAC Capabilities
Bit
Meaning
63
62.5
4
3
2
1
0
Contents of the QWord are valid
Reserved
Non-Data Reset Write Pointers Ext Supported bit
Non-Data Finish Zone Ext Supported bit
Non-Data Close Zone Ext Supported bit
Non-Data Open Zone Ext Supported bit
Reset Zones Ext Supported bit
120 - 511
Reserved
Table 7
Identify Device commands
Word
Description
Value
0
Configuration information:
Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5A
H
1
Number of logical cylinders
16,383
2
ATA-reserved
0000
H
3
Number of logical heads
16
4
Retired
0000
H
5
Retired
0000
H
6
Number of logical sectors per logical track: 63
003F
H
7–9
Retired
0000
H
10–19
Serial number: (20 ASCII characters, 0000
H
= none)
ASCII
20
Retired
0000
H
21
Retired
0400
H
22
Obsolete
0000
H
23–26
Firmware revision
(8 ASCII character string, padded with blanks to end of string)
x.xx
27–46
Drive model number:
(40 ASCII characters, padded with blanks to end of string)
