Запись массива на диск

type
  TMyRec = record
    SomeField: Integer;
    SomeOtherField: Double;
    TheRest: array[0..99] of Single;
  end;

var
  Stream: TBlobStream;
begin
  Stream := TBlobStream.Create(MyBlobField, bmWrite);
  Stream.Write(MyRec, SizeOf(MyRec));
  Stream.Free;
end;

var
  Stream: TBlobStream;
begin
  Stream := TBlobStream.Create(MyBlobField, bmRead);
  Stream.Read(MyRec, SizeOf(MyRec));
  Stream.Free;
end;