MO drives can be connected internally via IDE or SCSI and externally via SCSI, USB and FireWire. Tape Drives Even though tape drives are one of the oldest of storage technologies, they can still hold the most data on a single cartridge. Since tape is a sequential, and not a random-access media, a tape drive has to wind through a tape to locate a specific bit of data. This makes accessing data slow so tape is mainly used for system backups and regular archiving of files and records. Travan drives record data as a series of parallel tracks along the tape.
More tracks mean more storage capacity.
The higher the capacity of the drive the faster the data transfer rate. However, tape drives are still the slowest form of storage, taking up to hours to backup a system. Time is less of an issue for unattended backups. Higher capacity drives are also capable of reading lower capacity cartridges and some older QIC tapes. This format is best known for digital audio recording although DAT drives can't play DAT audio.