Seagate SV35 SV35.3 Series SATA Product Manual - Page 39
Identify Device command
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4.3.1 Identify Device command The Identify Device command (command code ECH) 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 30. 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 Configuration information: • Bit 15: 0 = ATA; 1 = ATAPI 0 • Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved 0C5AH 1 Number of logical cylinders 16,383 2 ATA-reserved 3 Number of logical heads 0000H 16 4 Retired 5 Retired 6 Number of logical sectors per logical track: 63 7-9 Retired 10-19 20 Serial number: (20 ASCII characters, 0000H = none) Retired 21 Retired 22 Obsolete 23-26 Firmware revision (8 ASCII character string, padded with blanks to end of string) 0000H 0000H 003FH 0000H ASCII 0000H 0400H 0000H 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 8010H multiple (16) 48 Reserved 49 Standard Standby timer, IORDY supported and may be disabled 50 ATA-reserved 51 PIO data-transfer cycle timing mode 52 Retired 0000H 2F00H 0000H 0200H 0200H SV35.3 Series Serial ATA Product Manual, Rev. B 33