/// <summary>
/// Attempts to initialise the ATA drive.
/// </summary>
protected void InitDrive()
{
// At this point, DiscoverDrive has been called, but the additional identification data
// has not been read
// If it's a PATAPI drive, we need to send the IDENTIFY_PACKET command
if (mDriveType == SpecLevel.PATAPI)
{
Reset();
SendCmd(Cmd.IdentifyPacket);
}
// Read Identification Space of the Device
var deviceInfoBuffer = new UInt16[256];
IO.Data.Read_UInt16s(deviceInfoBuffer);
mSerialNo = GetString(deviceInfoBuffer, 10, 20).Trim();
mFirmwareRev = GetString(deviceInfoBuffer, 23, 8).Trim();
mModelNo = GetString(deviceInfoBuffer, 27, 40).Trim();
// Hitachi hardrives found in real-world hardware failed in that:
// They only work with one-sector writes at a time
// This may be due to the fact that I'm working with old laptops and a sample size of one
// Hitachi drive. Newer drives may work properly. All drives will work with a max size of
// one though.
//
// Fujitsu drives suffer a similar fault.
if (mModelNo.StartsWith("Hitachi") || mModelNo.StartsWith("FUJITSU"))
{
maxWritePioBlocks = 1;
}
//Words (61:60) shall contain the value one greater than the total number of user-addressable
//sectors in 28-bit addressing and shall not exceed 0x0FFFFFFF.
// We need 28 bit addressing - small drives on VMWare and possibly other cases are 28 bit
blockCount = ((UInt32)deviceInfoBuffer[61] << 16 | deviceInfoBuffer[60]) - 1;
//Words (103:100) shall contain the value one greater than the total number of user-addressable
//sectors in 48-bit addressing and shall not exceed 0x0000FFFFFFFFFFFF.
//The contents of words (61:60) and (103:100) shall not be used to determine if 48-bit addressing is
//supported. IDENTIFY DEVICE bit 10 word 83 indicates support for 48-bit addressing.
bool xLba48Capable = (deviceInfoBuffer[83] & 0x400) != 0;
if (xLba48Capable)
{
blockCount = ((UInt64)deviceInfoBuffer[103] << 48 | (UInt64)deviceInfoBuffer[102] << 32 | (UInt64)deviceInfoBuffer[101] << 16 | (UInt64)deviceInfoBuffer[100]) - 1;
mLBA48Mode = true;
}
}
/// <summary>
/// Parses a string as an signed decimal integer.
/// </summary>
/// <param name="str">The string to parse.</param>
/// <returns>The parsed int.</returns>
public static int Parse_DecimalSigned(FOS_System.String str)
{
bool neg = str.StartsWith("-");
int result = (int)Parse_DecimalUnsigned(str, (neg ? 1 : 0));
if (neg)
{
result *= -1;
}
return(result);
}
/// <summary>
/// Attempts to initialise the ATA drive.
/// </summary>
protected void InitDrive()
{
// At this point, DiscoverDrive has been called, but the additional identification data
// has not been read
// If it's a PATAPI drive, we need to send the IDENTIFY_PACKET command
if (mDriveType == SpecLevel.PATAPI)
{
Reset();
SendCmd(Cmd.IdentifyPacket);
}
// Read Identification Space of the Device
var deviceInfoBuffer = new UInt16[256];
IO.Data.Read_UInt16s(deviceInfoBuffer);
mSerialNo = GetString(deviceInfoBuffer, 10, 20).Trim();
mFirmwareRev = GetString(deviceInfoBuffer, 23, 8).Trim();
mModelNo = GetString(deviceInfoBuffer, 27, 40).Trim();
// Hitachi hardrives found in real-world hardware failed in that:
// They only work with one-sector writes at a time
// This may be due to the fact that I'm working with old laptops and a sample size of one
// Hitachi drive. Newer drives may work properly. All drives will work with a max size of
// one though.
//
// Fujitsu drives suffer a similar fault.
if (mModelNo.StartsWith("Hitachi") || mModelNo.StartsWith("FUJITSU"))
{
maxWritePioBlocks = 1;
}
//Words (61:60) shall contain the value one greater than the total number of user-addressable
//sectors in 28-bit addressing and shall not exceed 0x0FFFFFFF.
// We need 28 bit addressing - small drives on VMWare and possibly other cases are 28 bit
blockCount = ((UInt32)deviceInfoBuffer[61] << 16 | deviceInfoBuffer[60]) - 1;
//Words (103:100) shall contain the value one greater than the total number of user-addressable
//sectors in 48-bit addressing and shall not exceed 0x0000FFFFFFFFFFFF.
//The contents of words (61:60) and (103:100) shall not be used to determine if 48-bit addressing is
//supported. IDENTIFY DEVICE bit 10 word 83 indicates support for 48-bit addressing.
bool xLba48Capable = (deviceInfoBuffer[83] & 0x400) != 0;
if (xLba48Capable)
{
blockCount = ((UInt64)deviceInfoBuffer[103] << 48 | (UInt64)deviceInfoBuffer[102] << 32 | (UInt64)deviceInfoBuffer[101] << 16 | (UInt64)deviceInfoBuffer[100]) - 1;
mLBA48Mode = true;
}
}
