Seagate Desktop HDD Product Manual - Page 29
Identify Device command, Description, Value
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www.seagate.com SATA Interface 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 on page 23. 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. Table 11 Identify Device commands 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 5 6 7-9 10-19 20 21 22 23-26 Retired Retired Number of logical sectors per logical track: 63 Retired Serial number: (20 ASCII characters, 0000H = none) Retired Retired Obsolete 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 multiple (16) 8010H 48 49 50 51 52 53 54 55 56 57-58 Reserved Standard Standby timer, IORDY supported and may be disabled ATA-reserved PIO data-transfer cycle timing mode Retired Words 54-58, 64-70 and 88 are valid Number of current logical cylinders Number of current logical heads Number of current logical sectors per logical track Current capacity in sectors 0000H 2F00H 0000H 0200H 0200H 0007H xxxxH xxxxH xxxxH xxxxH Seagate Desktop HDD Product Manual, Rev. J 25