IDE DVD-RAM/R - Page 1
Panasonic announced in the 24th of April 2001 a new combo drive
that supports both "DVD-RAM" and "DVD-R" recording technologies.
In addition to reading and writing to both DVD-RAM (rewritable) and DVD-R (write-once)
discs, the multifunction drive provides all of the functionality of the DVD
Forum specifications for DVD-RAM and DVD-R General, including maximum compatibility
with DVD video players, recorders and DVD-ROM drives. Panasonic's new DVD-RAM/R
solution is scheduled to begin shipping to OEM customers and channel partners
in the second quarter of 2001 and will have a price under 500$.
- Used Technologies
achieved the media interchangeability by developing an integrated lens/dual-laser
opto-mechanical assembly. The optical pick-up is composed of high-power red
lasers and optic detectors in the same unit. This allows compatibility with
optical discs of varying substrate thickness such as DVDs (0.6mm) and various
types of CDs (1.2mm). The drive uses one len and the 780nm laser to read all
compact discs and the 650nm laser to read and write DVD-RAM and DVD-R general
discs. Unlike to the DVD-R for professional authoring, which uses a laser with
a wavelength of 635nm, the Panasonic DVD-R for general applications uses a 650nm
light source, making it physically compatible with DVD-RAM technology which
also uses a 650nm laser diode.
Is there such market for DVD-RAM/R drives?
Panasonic feels that there is such a market. DVD-RAM is already
established mostly among professionals which are occupied with video editing
and the addition of DVD-R format will allow users to be benefited from the total
compatibility of the format:
"...The drive is compatible with every leading video authoring
packages that will enable consumers and businesses to download video and stills
from digital cameras and camcorders to their desktops, edit them, and enhance
them with audio. A business that will be adding products to a training film
or a home user that wants to compile a full season of their child's sports events
will store their video on DVD-RAM. By saving the videos to DVD-RAM media, users
can continue to add and delete videos or edit existing videos. A business can
add and remove products from a marketing video, update a kiosk video, or improve
instructions on a training video. Home users can add to videos and photo albums
on discs designated for special memories, vacations or individual family members.
small-scale distribution, relatively small quantities (2-50 copies) of DVD-R
general copies can be quickly, easily and economically produced in real time
and played back by most of the DVD-ROM drives and video players in use today.
No matter how many copies are produced, each will be as clean and crisp as the
original ? even if a copy of a copy. If the video requires broad distribution,
a master can be cut and sent to a service bureau for DVD-ROM production.
Many of the same capabilities that make the DVD-RAM/R drive
so appealing for AV applications provide key benefits to other applications
such as computer-aided engineering and graphic design, pre-press, and document
imaging, as well as Web server storage and site downloading. Panasonic's new
DVD-RAM/R drive is designed to move easily from AV to the computer, to TV and
the Web. It is what mainstream users have wanted in DVD all along..."
- Product specifications
With the ability to write to and read from general-purpose 4.7GB
DVD-R discs and 4.7GB/9.4GB DVD-RAM discs, the multifunction drive provides
the familiarity of CD-R/RW. Other features are the ability to play back DVD
video, DVD-ROM and DVD-R discs, and the 24x CD reading performance. Using the
4.7GB DVD-R General media, the Panasonic DVD-RAM/R drive provides a transfer
rate up to 11.08 Mbps, which is equivalent to about 9 times the transfer rate
of a CD-ROM's 1X speed. The 22.16 Mbps transfer rate for 4.7GB DVD-RAM is translated
to a 18x CD data rate. Seek times are 75ms for DVD-RAM and 65ms DVD-R, DVD-ROM
and CD media.
Specifications of LF-D311
4.7/9.4GB DVD-RAM (rewritable)
2.6/5.2GB DVD-RAM (rewritable)
4.7GB DVD-R General Use (write-once)
Data Transfer Rate (IF Interface):
Ultra DMA Mode 2: max. 33.3MB/s
PIO Mode 4: max. 16.6MB/s
Write Data Transfer Rate:
4.7GB DVD-RAM 1385KB with verifying
2.6GB DVD-RAM 690KB with verifying
4.7GB DVD-R 1385KB without verifying
Read Transfer Rate:
| DVD-RAM (4.7GB) : 2770KBps (2x)
DVD-RAM (2.6GB) : 1385KBps (1x)
DVD-ROM: 8310KBps (6x)
CD-ROM/CD-R: 3600KBps (24x)
CD-RW: 1800KBps (12x)
Average Seek Time:
DVD-ROM/R, CD-ROM: 65ms
4.7GB DVD-R (General)
CD-DA, CD-ROM/XA, Photo CD, Video CD,
CD-Extra CD-R, CD-RW at max. 24x
DVD-ROM, DVD-R at max. 6x
DVD-RAM (4.7GB at 2x , 2.6GB at 1x)
Dimensions (W H D):
| 146 41.3 196 mm
5.75" 1.63" 7.72"
1.1 kg (2.4 lbs.)
Initially, the drive will be supplied with an ATAPI interface for
OEMs and third-party subsystem suppliers. Several third-party firms already
offer Panasonic Combination drives with SCSI2, USB and IEEE-1394/FireWire connectivity.
Panasonic and other firms have already developed Windows Me, Windows 9X, Windows
NT, Windows 2000, and Macintosh OS 8.4 and above, Linux and UNIX support. Other
drivers are under development.