Quantum SDLT220
Tabletop, embedded, and library versions of the Super DLTtape drives start at 220 GB of compressed storage capacity, 22 MB/s compressed sustained data transfer rate.
The Super DLTtape technology roadmap is the first to demonstrate a path to more than 1TB of capacity at more than 100 MB/s transfer rate in the years ahead. This generation of drives is the realization of multiple advances in leading edge technology:
• Pivoting Optical Servo removes servo tracks from the data side of the tape.
• Partial Response Maximum Likelihood read channel creates more efficient data encoding.
• Magneto Resistive Cluster heads allow more tracks.
• Advanced Metal Particle media accepts higher densities of data with even higher integrity.
The SDLT 220 is backward read compatible with the tens of millions of DLTtape IV cartridges in use today.
Performance
| Native sustained transfer rate | 11 MB/s |
| 2:1 compressed transfer rate | 22 MB/s |
| Burst transfer rate SCSI bus | 80 MB/s max |
| Native formatted capacity | 110 GB |
| 2:1 compressed capacity | 220 GB |
| Cartridge load time to BOT, formatted tape | 12 sec |
| Cartridge load time to BOT, unformatted tape | 40 sec |
| Average file access time | 70 sec |
| Interfaces available | LVD, Ultra 2 SCSI, HVD, Ultra SCSI |
Tape Format
| Recording format | 448 track serial serpentine |
| Recording density | 113 k bits / inch |
| Track density | 896 tpi |
| Encoding method | Partial Response Maximum Likelihood (PRML) |
| Data compression | DLZ |
Embedded tabletop and library versions are available with either SCSI HVD or LVD interfaces (Ultra 2).
Recognized worldwide as the industry standard with an installed base of 1.7 million DLTtape drives and over 70 million DLTtape cartridges, Super DLTtape Technology takes three decades of reliability and moves it fast forward, for long-term scalability in future midrange and enterprise storage environments.