{

this->driveName = options.readerName;

std::vector<u64> drivesSizes;

int missingDrives = 0;

for (auto& drive : options.driveReaders)

{

if (!drive)

{

if (missingDrives >= options.driveReaders.size())

{

throw std::invalid_argument("For RAID 1 only at least 1 drive must exists :)");

}

missingDrives++;

continue;

}

drivesSizes.push_back(drive->driveSize());

this->drives.push_back(drive);

}

this->singleDriveSize = *std::min_element(drivesSizes.begin(), drivesSizes.end());

// 32MiB from the end of drive are stored controller's metadata.

this->singleDriveSize -= 1024 * 1024 * 32;

this->setPhysicalDriveOffset(options.offset);

u64 maximumSize = this->singleDriveSize - this->getPhysicalDriveOffset();

this->setSize(maximumSize, 0);

if (options.size > 0)

{

this->setSize(options.size, this->singleDriveSize);

}

{

if (offset >= this->driveSize())

{

std::cerr << this->name() << ": Tried to read from offset exceeding array size. Skipping." << std::endl;

std::cerr << "Offset: " << offset << std::endl;

std::cerr << "Drive Size: " << this->driveSize() << std::endl;

return -1;

}

for (int i = 0; i < this->drives.size(); i++)

{

try

{

return this->drives[i]->read(buf, len, offset + this->getPhysicalDriveOffset());

}

catch (std::exception& ex)

{

if (( i + 1 ) >= this->drives.size())

{

throw;

}

std::cerr << "Read from drive "

<< this->drives[i]->name() << " has failed."

<< " Reason: " << ex.what() << std::endl;

std::cout << "Reader will try to read from another drive in the RAID 1 array.";

}

}

return -1;