.net - C#/Native: Reading HDD Serial Using SCSI PassThrough -

i have written 3 different methods make use of native createfile , deviceiocontrol calls in order retrieve hdd serial number (not model number). first 1 uses s.m.a.r.t., second 1 uses storage query , third 1 uses scsi passthrough. of code based on content of this thread (with fixes , improvements).

here results using diskid32 utility:

trying read drive ids using physical access admin rights  drive model number________________: [st975xxxxx] drive serial number_______________: [            6ws2xxxx]  trying read drive ids using physical access 0 rights  product id = [st975xxxxx] serial number = [6ws2xxxx]  trying read drive ids using smart  drive model number________________: [st975xxxxx] drive serial number_______________: [            6ws2xxxx] 

now, here results using methods:

s.m.a.r.t. = 6ws2xxxx storage query = 6ws2xxxx scsi passthrough = st975xxxxx 

well... houston have problem here. first 2 methods correct serial number. last 1 model number bad. now, here code:

--- method ---  internal static string getharddiskserialscsipassthrough(safefilehandle devicehandle) {     intptr bufferpointer = intptr.zero;     string serial = string.empty;     uint32 bytesreturned;      scsipassthroughbuffered bspt = new scsipassthroughbuffered();     bspt.spt.length = (uint16)marshal.sizeof(bspt.spt);     bspt.spt.commanddescriptorblocklength = 16;     bspt.spt.datain = 0x1;     bspt.spt.datatransferlength = 64;     bspt.spt.databufferoffset = new intptr(marshal.sizeof(bspt) - 64);     bspt.spt.timeoutvalue = 60;     bspt.spt.commanddescriptorblock = new byte[] { 0x12, 0x1, 0x80, 0x0, 64, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };      int32 buffersize = marshal.sizeof(bspt);      try     {         bufferpointer = marshal.allochglobal(buffersize);          marshal.structuretoptr(bspt, bufferpointer, true);          if (deviceiocontrol(devicehandle, 0x4d004, bufferpointer, (uint32)buffersize, bufferpointer, (uint32)buffersize, out bytesreturned, intptr.zero) && (bytesreturned > 0))         {             scsipassthroughbuffered result = (scsipassthroughbuffered)marshal.ptrtostructure(bufferpointer, typeof(scsipassthroughbuffered));             serial = encoding.ascii.getstring(result.buffer, 0, result.buffer.length).replace("\0", string.empty).trim();         }     }         {         marshal.freehglobal(bufferpointer);     }      return serial; }  --- structures ---  [structlayout(layoutkind.sequential)] private struct scsipassthrough {     public uint16 length;     public byte scsistatus;     public byte pathid;     public byte targetid;     public byte logicalunitnumber;     public byte commanddescriptorblocklength;     public byte senseinfolength;     public byte datain;     public uint32 datatransferlength;     public uint32 timeoutvalue;     public intptr databufferoffset;     public uint32 senseinfooffset;     [marshalas(unmanagedtype.byvalarray, sizeconst = 16)]     public byte[] commanddescriptorblock; }  [structlayout(layoutkind.sequential)] private struct scsipassthroughbuffered {     public scsipassthrough spt;     public uint32 filler;     [marshalas(unmanagedtype.byvalarray, sizeconst = 64)]     public byte[] buffer; } 

what doing wrong? maybe using wrong cdb?

your code runs ok me, i.e. returns same data other methods described in referenced thread. change had make from:

serial = encoding.ascii.getstring(result.buffer, 0, result.buffer.length)                        .replace("\0", string.empty)                        .trim(); 

to:

serial = encoding.ascii.getstring(result.buffer, 0, result.buffer.length)                        .substring(intptr.size)                        .replace("\0", string.empty)                        .trim();