Specifications For The Matsushita Dvd Ram Uj 840S

Performance. The Matsushita UJ-840S played and recorded — or “read” and “wrote” — DVDs at a slower speed than it did CDs. The optical drive could read CD-ROMs at 24x, while the reading speed for DVD-ROMs was 8x. In terms of writing performance, CD-Rs and CD-RWs had rates of 24x and 10x, respectively.

What is the capacity of a DVD-RAM?

Physically smaller, 80 mm in diameter, DVD-RAM discs also exist with a capacity of 1.46 GB for a single-sided disc and 2.8 GB for a double-sided disc, but they are uncommon.

What DVD-RAM means?

A digital versatile disk random access memory (DVD-RAM) drive is a rewritable and erasable optical disc drive specified by the DVD Forum in 1996. It is a media storage device used in computers, camcorders and personal video recorders.

What is DVD-RAM used for?

DVD-RAM stands for Digital Versatile Disk – Random Access Memory. DVD-RAM is a DVD optical disk storage on which data can be continuously read, erased, and written. It provides exceptional data integrity and damage protection and can be used for data storage and data backup.

What is the difference between DVD R and DVD-RAM?

The main difference between a DVD+R DL and the DVD+R is that the DVD+R DL can store up to 8.5 gigabytes on one disc side, unlike the DVD+R and DVD-R, which have a 4.7 gigabyte capacity. DVD-RAM is a very robust data storage format, theoretically allowing greater than 100,000 rewrites per disc.

How do you read DVD-RAM?

Can DVD players play DVD-RAM?

RAM Discs cannot be finalised and can only be played on DVD Players/recorders bearing the DVD RAM Logo. Try re-recording and finalising on another ‘Branded’ DVD disc. The cheaper DVD discs although they may work most of the time, may produce failed discs that will not play on all machines.

Can DVD-RAM drive burn CDs?

Answer: If the drive only says “CD-ROM” or “DVD-ROM” then it probably does not burn CDs or DVDs. If it says CD-R, then it can burn recordable CDs and if it says CD-RW, it can write and rewrite to rewritable CDs. If the drive says DVD-R or DVD+R, it can burn DVD-R or DVD+R discs.

Is DVD-RAM a secondary storage?

Primary memory usually refers to Random Access Memory (RAM), while secondary storage refers to devices such as hard disk drives, solid state drives, removable “USB” drives, CDs, and DVDs.


DVD-RAM is a portable, removable and rewritable optical disc format. Unlike the standard DVD medium, DVD-RAM can be written, erased and/or overwritten (with a maximum overwrite capacity of 100,000).

Is DVD-RAM non volatile?

Optical Technology

CDs and DVDs are also a form of non-volatile memory, storing their data in pits on the surface of the disks. They use optical technology as opposed to most other types of computer storage, which are typically magnetic based.

What is the maximum capacity of a DVD?

As a result, the DVD specification provided a storage capacity of 4.7 GB (4.38 GiB) for a single-layered, single-sided disc and 8.5 GB (7.92 GiB) for a dual-layered, single-sided disc.

Can all DVD drives read all DVD formats?

There are several different DVD formats, not all of which are compatible with all DVD players and DVD drives. DVD-Video and DVD-ROM are widely-supported standards, and all players and drives should be able to read them.

How do I know if DVD-R or RW?

The main difference between DVD R and DVD RW is that the R is a write-once format. Data can be burned on the DVD only once. On the other hand, data on an RW disc can be erased and rewritten several times. Both DVD R and DVD RW come in +/- formats.

Why is DVD-RAM better than DVD RW?

DVDs created by a -R/-RW device can be read by most commercial DVD-ROM players. DVD-RAM discs can be recorded and erased repeatedly but are compatible only with devices manufactured by the companies that support the DVD-RAM format. DVD-RAM discs are typically housed in cartridges.

How does a DVD drive work?

The DVD player decodes the MPEG-2 encoded movie, turning it into a standard composite video signal. The player also decodes the audio stream and sends it to a Dolby decoder, where it is amplified and sent to the speakers. The drive consists of three fundamental components : Drive Motor : It is used to spin the disc.

How does DVD RW work?

The recording layer in DVD-RW and DVD+RW is not an organic dye, but a special phase change metal alloy, often GeSbTe. The alloy can be switched back and forth between a crystalline phase and an amorphous phase, changing the reflectivity, depending on the power of the laser beam.

Why won’t my DVD-R play on my DVD player?

Ensure that the disc has been inserted into the player correctly. Examine the DVD for fingerprints, smudges, or scratches and, if necessary, clean the disc using a soft dry cloth. Ensure the disc has been properly created and finalized. Ensure the DVD region code and format of the disc is compatible with the player.

How do I know if my computer can burn CDs?

To determine whether your computer can burn CDs and DVDs, look for the letters RW in the drive icon’s name. Most computers today can write information to a CD and DVD using an approach known as burning.

Do I need software to burn a DVD?

You must have a disc drive capable of burning a CD (compact disc) and a blank recordable CD-R (recordable CD-ROM). For example, a CD-RW and DVD-RW are examples of drives capable of burning a CD. A standard CD-ROM drive cannot burn a CD with any software program.

Are DVD storage devices offline?

Devices such as portable hard discs, CDs, DVDs, USB flash drives and SD cards are all examples of offline storage.

Is DVD a storage device?

DVD (Digital Versatile/Video Disc) is storage medium with a greater audio- visual data storage capacity than that of the CD of the same dimensions. (A single layered DVD holds a little more than 4 GBs of data). In this activity we will look at how to use these storage devices.

Is DVD and DVD-RAM same?

The Differences Between DVD-ROM and DVD-RAM

Generally, DVD-RAM is used to store data, and DVD-ROM is used for movies and supplementary music presentations. The DVD-RAM is read and write, while the DVD-ROM is read-only. This means that once the data is encoded, the disc is in a fixed state and cannot be changed.

What is DVD and DVD-ROM?

A read-only DVD disc used to permanently store data files. DVD-ROM discs are widely used to distribute large software applications that exceed the capacity of a CD-ROM disc. DVD-ROM discs are read in DVD-ROM and DVD-RAM drives in computers, but typically not in DVD drives connected to TVs and home theater systems.

What is the size of DVD?

DVDs resemble compact discs as their physical dimensions are the same (120 mm (4.72 inches) or occasionally 80 mm (3.15 inches) in diameter) but they are encoded in a different format and at a much higher density.

What is DRAM storage?

Dynamic random access memory (DRAM) is a type of semiconductor memory that is typically used for the data or program code needed by a computer processor to function. DRAM is a common type of random access memory (RAM) that is used in personal computers (PCs), workstations and servers.

Can a DVD hold 17 GB?

Single-layer, single-sided DVDs hold about 4.7 GB. A dual-layer or double-sided DVD can hold up to 8.5 GB; a dual-layer, double-sided DVD can hold up to 17 GB.

Can a DVD hold more than 4.7 GB?

DVD-5, a single-layer DVD, can hold up to 4.7GB of data, while DVD-9, a dual-layer, single-sided DVD have the capacity of up to 8.5GB.

How many minutes is 4.7 GB DVD?

A DVD-5 is a single layer DVD that holds up to 4.7GB of data (around 120-133 minutes of video depending on compression).

What are the 3 types of optical drives?

There are three main types of optical media: CD, DVD, and Blu-ray disc. CDs can store up to 700 MB (megabytes) of data, and DVDs can store up to 8.4 GB (gigabytes) of data.

What is the difference between BD R and BD RE discs?

Blu-ray Disc Recordable (BD-R) refers to two direct to disc optical disc recording technologies that can be recorded on to a Blu-ray-based optical disc with an optical disc recorder. BD-R discs can be written to once, whereas Blu-ray Disc Recordable Erasable (BD-RE) can be erased and re-recorded multiple times.

Can any DVD drive read dual layer?

Yes. Dual layer media plays just fine in standard DVD players.

What is better DVD-RW or DVD-RW?

From a technical perspective, the DVD-RW format requires shorter time to burn the lead in/out, and therefore has slightly more compatibility with DVD players. On the other hand, the DVD+RW format has some special features, such as lossless linking, and both CAV and CLV writing.

Can a DVD-RW drive play DVDs?

Also, realize that although you may have a drive capable of reading CD-ROM, CD-RW, and CD-R discs, it still may be unable to read DVD discs. However, a DVD+R or DVD+RW drive is also capable of reading DVD discs.

Is DVD-RW good?

This makes them an excellent value if your drive is capable of writing to dual-layer discs. On the other hand, if you only have a single-layer drive, you’ll be overpaying for a feature you can’t use. The Maxell Rewritable Superior Archival Life 4.7Gb DVD+RW Disc is the best choice for archival storage.

What resolution is DVD?

720 × 480 pixels (same resolution as D-1).

Does a DVD player have a motor?

The DVD drive consists of three fundamental components: A drive motor to spin the disc – The drive motor is precisely controlled to rotate between 200 and 500 rpm, depending on which track is being read.

What are the components of a DVD player?

Like a CD player, a DVD player has three main components—a disk drive mechanism, an optical assembly system, and an internal electronic circuit board. The disk drive mechanism typically consists of a spindle that holds the disk and a motor that spins it.