Quantum / Certance DAT40 DDS DAT Drive
The Seagate DDS-4 (digital data storage) and DAT 72 (digital audio tape) drives are designed for computer environments that require high-performance, high-capacity data storage.
Based on a 3.5-inch mechanism, the internal and external models provide the following data storage capacities and native transfer rates:
Data Storage Capacity: 20 Gbytes (40 Gbytes compressed)
Native Transfer Rate: 2.75 Mbytes per second (5.5 Mbytes per second compressed)
The DDS-4 drives combine established DAT technology, high – density recording and hardware data-compression capability along with Seagate’s proven computer-grade design to provide unmatched reliability and performance characteristics among DDS products.
The DAT 72 and DDS-4 drives are ideal for workstation, server, and network / enterprise applications such as:
• Backup of high-capacity fixed discs
• Data interchange between systems
• Network servers
• Loader products
• Online data collection
• Near-line secondary storage for text, graphics or multimedia information of all types
• Archival storage
The DAT 72 and DDS-4 drives represent Seagate’s commitment to reliable
engineering and durable tape drive products that implement leading-edge
technology.
Key features of the drives include:
• A platform based on state-of-the-art sealed drive mechanism and tape-handling components for improved immunity to airborne contaminants and extended media life
• Three available form factors: 3.5-inch internal for installation in a 3.5-inch halfheight space; 3.5-inch drive with factory-installed 5.25-inch mounting rails and bezel for installation in a 5.25-inch half-height space; and external subsystem with built-in, auto-sensing, worldwide power supply
• ANSI/ECMA compliance and capability to write and read DDS 5th
Generation (DAT 72 only) DDS-4, DDS-3, and DDS-2 (DDS-4 only) cartridges
• Advanced onboard DDS-DC hardware using Data Compression Lempel-Ziv
(DCLZ) data-compression algorithm
• High-speed transfer rates for fast backups
DDS-4:
– 2.75 Mbytes per second typical—uncompressed data
– 5.5 Kbytes per second typical—compressed data
DAT 72:
– 3.5 Mbytes per second typical—uncompressed data
– 7.0 Kbytes per second typical—compressed data
• High-performance SCSI burst transfer rate of 10 Mbytes per second
asynchronous and 80 Mbytes per second synchronous
• Flash memory to store setup parameters and enable field firmware upgrades
• Four-head design with RAW error detection and rewrites
• Three levels of ECC to ensure data integrity
• Uncorrectable error rate of less than 1 in 1015 bits
• LVD / Ultra Wide SCSI connection
• Automatic power-on self-test
• Support for TapeAlert™ Certified Solutions
Capacity
| Compressed Capacity | Up to 40 GB |
| Native Capacity | Up to 20 GB |
| Recording Format | DDS-4 |
| Interface Type | Ultra2 SCSI LVD |
Environmental Limits
| Min/Max Operating Temp | 5 deg C / 45 deg C |
| Max Operating Humidity | 80% |
| Max Operating Shock | 10 Gs |
| Max Non-Operating Shock | 100 Gs |
| Max Operating Vibration | .5 G |
| Max Non-Operating Vibration | 1.5 G |
Performance
| Native Sustained Transfer Rate | 9.9 GB/hour |
| Compressed Sustained Transfer Rate | up to 19.8 GB/hour |
| Average File Access Time | < 40 seconds |
| Search Speed | 400x normal |
| Drum Rotational Speed | 10000 RPM |
| Backup Speed | 9.9 GB/hour |
| Compressed Backup Speed | up to 19.8 GB/hour |
| Buffer Memory Size | 10 MB |