public static ModePage_04?DecodeModePage_04(byte[] pageResponse)
{
if ((pageResponse?[0] &0x40) == 0x40)
{
return(null);
}
if ((pageResponse?[0] &0x3F) != 0x04)
{
return(null);
}
if (pageResponse[1] + 2 != pageResponse.Length)
{
return(null);
}
if (pageResponse.Length < 20)
{
return(null);
}
var decoded = new ModePage_04();
decoded.PS |= (pageResponse[0] & 0x80) == 0x80;
decoded.Cylinders = (uint)((pageResponse[2] << 16) + (pageResponse[3] << 8) + pageResponse[4]);
decoded.Heads = pageResponse[5];
decoded.WritePrecompCylinder = (uint)((pageResponse[6] << 16) + (pageResponse[7] << 8) + pageResponse[8]);
decoded.WriteReduceCylinder = (uint)((pageResponse[9] << 16) + (pageResponse[10] << 8) + pageResponse[11]);
decoded.DriveStepRate = (ushort)((pageResponse[12] << 8) + pageResponse[13]);
decoded.LandingCylinder = (pageResponse[14] << 16) + (pageResponse[15] << 8) + pageResponse[16];
decoded.RPL = (byte)(pageResponse[17] & 0x03);
decoded.RotationalOffset = pageResponse[18];
if (pageResponse.Length >= 22)
{
decoded.MediumRotationRate = (ushort)((pageResponse[20] << 8) + pageResponse[21]);
}
return(decoded);
}
public static string PrettifyModePage_04(ModePage_04?modePage)
{
if (!modePage.HasValue)
{
return(null);
}
ModePage_04 page = modePage.Value;
StringBuilder sb = new StringBuilder();
sb.AppendLine("SCSI Rigid disk drive geometry page:");
if (page.PS)
{
sb.AppendLine("\tParameters can be saved");
}
sb.AppendFormat("\t{0} heads", page.Heads).AppendLine();
sb.AppendFormat("\t{0} cylinders", page.Cylinders).AppendLine();
if (page.WritePrecompCylinder < page.Cylinders)
{
sb.AppendFormat("\tWrite pre-compensation starts at cylinder {0}", page.WritePrecompCylinder)
.AppendLine();
}
if (page.WriteReduceCylinder < page.Cylinders)
{
sb.AppendFormat("\tWrite current reduction starts at cylinder {0}", page.WriteReduceCylinder)
.AppendLine();
}
if (page.DriveStepRate > 0)
{
sb.AppendFormat("\tDrive steps in {0} ns", (uint)page.DriveStepRate * 100).AppendLine();
}
sb.AppendFormat("\tHeads park in cylinder {0}", page.LandingCylinder).AppendLine();
if (page.MediumRotationRate > 0)
{
sb.AppendFormat("\tMedium rotates at {0} rpm", page.MediumRotationRate).AppendLine();
}
switch (page.RPL)
{
case 0:
sb.AppendLine("\tSpindle synchronization is disable or unsupported");
break;
case 1:
sb.AppendLine("\tTarget operates as a synchronized-spindle slave");
break;
case 2:
sb.AppendLine("\tTarget operates as a synchronized-spindle master");
break;
case 3:
sb.AppendLine("\tTarget operates as a synchronized-spindle master control");
break;
}
return(sb.ToString());
}
