The HP DDS-format drives have been developed by Hewlett Packard for data storage drives that build on DAT technology. The DDS-2 drive has 4-GB native capacity, yielding up to 8 GB of stored data and has data compression functionality.
The HP C1539A implements the DDS-2 format. This includes all of the features of the DDS-1 and DDS-DC formats, plus the ability to read and write with much higher
Features
• Reads and writes using DDS-1 and DDS-DC formats when using DDS-1 media
(60 m and 90 m). Has all of the features of the DDS-1 and DDS-DC formats.
• Reads and writes with much higher capacity when using DDS-2 media (120 m).
DDS-2 Drive Environmental Requirements
The DDS-2 drive has the following environmental requirements:
• Ambient Temperature
Operating 5 C to 40 C (41 F to 104 F) Non-Operating –40 C to 70 C (–40 F to 158 F)
• Altitude
Operating 0 km to 4.6 km (0 to 15,000 ft) Non-Operating 0 km to 15.2 km (0 to 50,000 ft)
• Humidity
Operating 20% to 80%RH (non-condensing) Non-Operating 5% to 95%RH (non-condensing) Maximum wet bulb temperature = 26 C
| HP C1533A Specifications | |
| Capacity | 4 GB native (8 GB with hardware data compression) |
| Recording Format | ANSI/ISO/ECMA DDS, DDS-DC, DDS-2 and DDS-3 |
| Compression Technique | DCLZ |
| Backup rate, compressed | 3.6 GB/hr* |
| Backup rate, native | 1.8 GB/hr |
| Burst Transfer Rate | 3 MB/sec. max (asynchronous)10 MB/sec. max synchronous |
| Media | DDS-2 (8GB*), DDS-1 (4GB*), DDS-1 (2.6 GB*) |
| Interface | Single-ended narrow SCSI-2 |
| Power Requirements | DAT 8i: +5V DC, 0.8 A; +12V DC, 0.1 ADAT 8e: 100-240V. 0.5 A, 50-60 HzDAT 8eU: 100-240V, 0.8 A, 50-60 Hz |
| MTBF | DAT 8i: 300,000 hours at 12% duty cycleDAT 8e: 200,000 hours at 12% duty cycle |
| * Capacities and transfer rates assume 2:1 data compression. Actual compression may differ because compression varies with data type. | |