Seagate NAS HDD - Identify Device Command

Seagate NAS HDD Product Manual, Rev. C 24
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 22. 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
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)
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple and Write multiple (16) 8010
H
48 Reserved 0000
H
49 Standard Standby timer, IORDY supported and may be disabled 2F00
H
50 ATA-reserved 0000
H
51 PIO data-transfer cycle timing mode 0200
H
52 Retired 0200
H
53 Words 54–58, 64–70 and 88 are valid 0007
H
54 Number of current logical cylinders xxxx
H