SATA IDENTIFY_DEVICE_DATA Structure 516 bytes

[tsdnz]

The _IDENTIFY_DEVICE_DATA structure from MS is 516 bytes long
http://msdn.microsoft.com/en-us/library ... s.85).aspx
It is a 32 bit program, so long = dword, otherwise long as qword is 544 bytes.

Any hints?

[tsdnz]

Also, can I get it to put values into Max48BitLBA[0] & Max48BitLBA[1] ??

These are currently zero

[HugeCode]

The _IDENTIFY_DEVICE_DATA structure from MS is 516 bytes long

How did you get that number?

Code: Select all

USHORT Signature  :8;

should actually take only one byte of memory.

Also, can I get it to put values into Max48BitLBA[0] & Max48BitLBA[1] ??

wiki:

Word 83: Bit 10 is set if the drive supports LBA48 mode.

[tsdnz]

How did you get that number?

516 = sizeof(IDENTIFY_DEVICE_DATA)

Code:
USHORT Signature :8;

should actually take only one byte of memory.

Looks to me like it is only one byte within the context.

Code: Select all

struct {
    byte NVCacheEstimatedTimeToSpinUpInSeconds;
    byte Reserved;
  } NVCacheOptions;
  word ReservedWord220[35];
  word Signature  :8;
  word CheckSum  :8;

Thanks for the wiki link, it has answered two other questions.

[tsdnz]

Hi, just thought about packed.

This makes it 512.
__attribute__ ((__packed__))