public int readFromArray(List <sbyte> newData)
{ //returns time of operation of -1 in case of failure
DateTime start, end;
start = DateTime.Now;
if (isEnoughDisks() == 0)
{
return(-1);
}
int mem = 0; //memory slot
int hdd = 0; //hdd number in array
int counter = 0; //helps to find checksum block
sbyte b = 0;
bool cont = true;
do
{
if (counter != 2)
{
if (array.getDisk(hdd).getState())
{
b = array.getDisk(hdd).readByte(mem);
}
else
{
b = xor(hdd + 2, hdd + 1, mem, mem);
}
counter++;
}
else
{
counter = 0;
}
if (b == -128) //if there is no data to read readByter(...) returns -128
{
cont = false;
}
hdd++;
if (hdd >= array.Count)
{
mem++;
hdd = 0;
}
} while (cont);
end = DateTime.Now;
TimeSpan resultTime = end - start;
return(resultTime.Seconds * 1000 + resultTime.Milliseconds + Convert.ToInt32(array.getReadLatency(0)));
}
public int readFromArray(List <sbyte> newData)
{
DateTime start, end;
start = DateTime.Now;
if (isEnoughDisks() == 0)
{
return(-1);
}
int mem = 0; //memory slot on disk
int hdd = 0; //disk number in array
bool cont = true;
sbyte b;
do
{
if (array.getDiskState(hdd))
{
b = array.readFromDisk(hdd, mem);
if (b == -128)
{
cont = false;
}
else
{
newData.Add(b);
hdd++;
}
if (hdd >= array.Count)
{
hdd = 0;
mem++;
}
}
else
{
return(-1);
}
}while(cont);
end = DateTime.Now;
TimeSpan resultTime = end - start;
return(resultTime.Seconds * 1000 + resultTime.Milliseconds + Convert.ToInt32(array.getReadLatency(0)));
}
public int readFromArray(List <sbyte> newData)
{ //returns time of operation of -1 in case of failure
DateTime start, end;
start = DateTime.Now;
if (isEnoughDisks() == 0)
{
return(-1);
}
int mem = 0; //memory slot number
int hdd = 0; //hard disk number in array
bool cont = true; //false when nothing to read from disk
sbyte b;
while (cont) //while there is data in array to read
{
if (array.getDisk(hdd).getState())
{
b = array.getDisk(hdd).readByte(mem);
if (b == -128) //if there is no data to read readByter(...) returns -128
{
cont = false;
}
else
{
mem++;
if (mem > array.getDisk(hdd).getFreeSpace())
{
if (hdd % 2 == 1)
{
hdd++;
}
else
{
hdd += 2;
}
}
}
}
else
{
if (hdd % 2 == 1)
{
return(-1);
}
hdd++;
}
}
end = DateTime.Now;
TimeSpan resultTime = end - start;
return(Convert.ToInt32((resultTime.Seconds * 1000 + resultTime.Milliseconds + Convert.ToInt32(array.getReadLatency(0))) * 3.5));
}