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Home > Technology Previews > General Computing

Sunday, February 17, 2002
Cebit 2001 Show

18. Panasonic ships DVD-R/RAM combo drive

Panasonic ships DVD-R/RAM combo drive

Panasonic presents a further break-through in the DVD technology to the CeBIT with the new LF-D311: It is the first multi-function drive, which controls both a describing and a reading of several times recordable DVD RAMs and from uniquely recordable DVD R-S. The media created thereby fulfill all request of the DVD forum and offer so the 100 percent compatibility not only with DVD ROM drives, but also with DVD video Playern and - to recorders. Thus the LF-D311 strikes a crucial bridge between the computer world and the world of the entertainment electronics. Like that the drive for DVD and SINCE IDIOMS is universally applicable: at home as high performance video recorders and memories for the PC, in the office for economical storing and archiving as well as in studios for professional developing and testing of master DVDs.

15 years experience with optical memory procedures and 3 years with DVD RAM drives into the newest development of Panasonic flowed. Switching between a laser with a wavelength of 650 nanometers (Nm) and one with 780 Nm guarantees highest possible compatibility with the LF-D311: The new DVD RAM/R drive can read and describe both 4,7-Giga-Bytes(GB)-DVD-Rs and 4,7-GB-(9,4-GB-)DVD-RAMs. Even the older 2,6-GB-(5,2-GB-)DVD-RAMs can be processed. The DVD technology has crucial advantages opposite from CD: It offers a higher data security, the capacity is zirka seven times more largely and the rate around a multiple more highly. Only on a DVD a feature in perfect digital quality can be stored.

Additionally and does not only describe the LF-D311 reads DVD RAMs and DVD R-S, but is also read compatible to the formats DVD-ROM, DVD video, DVD-R, audio CD, video CD, CD ROM and CD-R/RW. As CD-Drive it operates at 24x rate.

With 4,7-GB-DVD-Rs the new DVD RAM/R drive achieves a raterate rate of up to 11,08 megabits per second (Mbps). That corresponds zirka the 9x rate from CD-ROMs (1 x). max. to 22.16 Mbps is it with 4,7-GB-DVD-RAMs, with which they exceed the CD zirka around the 8x. The average access times amount to 75 milliseconds (ms) for DVD RAMs and 65 milliseconds for DVD R-S, DVD ROMs and CD.

The DVD-R technology is in the best way for it suitably, important information permanently, surely, to store fast and space-saving for example the data of banks, insurance, attorney offices, hospitals, offices and all dataintensive companies. Nevertheless the information is easily accessible. Finally the most DVD video Player and DVD ROM drives can DVD-Rs read and for the further handling for example on computer fixed disks copy.

DVD RAMs can be again-described up to 100,000 times. They are therefore particularly suitable data carriering for backup copies, to which one would like to fall back regularly. Compared with tapes they offer the advantage of the fast access. Owing to the various application type of the DVD RAM/R drive also its target group is very far varied: Is useful for all private customers and businessmen, who look an extensive and future-reliable DVD solution up both for the video area and for professional storing and archiving of data.

The DVD RAM/R drive LF-D311 is available starting from September 2001 in the trade. Excluding OEM customers can the new DVD RAM drive over the Panasonic Industrial Europe GmbH refer.

Technical data of the Panasonic
4,7GB of DVD RAM/R drive LF-D311

4.7/9.4 GB DVD-RAM (rewritable)
2.6/5.2 GB DVD-RAM (rewritable)
4.7 GB DVD-R general use (write once)

Buffer size
1 MB


Write function
22.16 Mbps (max.) 4.7 GB DVD-RAM
11.08 Mbps (max.) 2.6 GB DVD-RAM
11.08 Mbps (max.) 4.7 GB DVD-R (general)

Reading function:
- CD-DA, CD-CRom/xa, photo CD, video CD, D-CExtra CD-R, CD-RW: max. 24x
- DVD-ROM, DVD-R: max. 6 x; DVD-RAM: 4.7 GB 2 x, 2.6 GB 1 x

Average access time
- DVD-RAM: 75 ms
- DVD ROM/R, CD ROM: 65 ms

Raterate rate (IF interface)
- Ultra DMA Mode2: max. 33.3 MB/s
- PIO Mode4: max. 16.6 MB/s

Raterate rate writing and reading
- DVD-RAM (4.7 GB): 2 ,770 KB/s (2x)
- DVD-RAM (2.6 GB): 1,385 KB/s (1x)
- DVD-R (4.7 GB): 1,385 KB/s (1x)

Raterate rate reading
- DVD-ROM: 8,310 KB/s (6 x)
- CD-CRom/cd-r 3,600 KB/s (24 x)
- CD-RW: 1,800 KB/s (12 x)

Current supply: 12 V / 5 V, ± 5 %
Dimensions (B x H x T): 146 x 41.3 x 196 mm
Weight :1.1 kg
Date of delivery: September 2001

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