Most storage networks use the SCSI protocol for communication between servers and disk drive devices. These were sectors on the disk that were intentionally unreadable by the disk drive. PCIe-based flash storage is standard with no option of a hard disk drive. INT 13H or the disk drive hardware. CrystalDiskInfo is an MIT-licensed S.M.A.R.T. utility for reading and monitoring disk drive status. It was one of the first machines with a 1.44 MB density 3.5-inch disk drive. Disk encryption refers to encryption technology that encrypts data on a hard disk drive. Similar figures apply to other hard disk drive sizes. The size of the hard disk drive is 40 GB. An example is a computer hard disk drive. The console came complete with a built in CD-ROM drive and disk drive. This list does not include games for Nintendo's 64DD disk drive peripheral. However, the drop in disk drive prices made such alternatives obsolete. Failure of a hard disk drive can be catastrophic or gradual. KERNAL, I/O, and tape/disk drive operations are accessed via custom BASIC language commands.