4 // Description: Class to handle low-level disk I/O for GPT fdisk
124    // Close the disk, in case it's already open for reading only....  in OpenForWrite()
146 // Close the disk device. Note that this does NOT erase the stored filenames,
158 // (512). If the disk can't be opened at all, return a value of 0.
165    // If disk isn't open, try to open it....  in GetBlockSize()
188          // ENOTTY = inappropriate ioctl; probably being called on a disk image  in GetBlockSize()
195             cout << "Disk device is " << realFilename << "\n";  in GetBlockSize()
209    // If disk isn't open, try to open it....  in GetPhysBlockSize()
232    // If disk isn't open, try to open it....  in GetNumHeads()
250    // If disk isn't open, try to open it....  in GetNumSecsPerTrack()
260 // Resync disk caches so the OS uses the new partition table. This code varies
268    // If disk isn't open, try to open it....  in DiskSync()
279                * it definitely will get things on disk though:  in DiskSync()
322    // If disk isn't open, try to open it....  in Seek()
345    // If disk isn't open, try to open it....  in Read()
388    // If disk isn't open, try to open it....  in Write()
434 // return correct values for disk image files.
444    // If disk isn't open, try to open it....  in DiskSize()