Dvd-Rw Does Not Recognize Disk latest 2023

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Data Storage Media – A Guide to Selecting Media For Storing and Backing Up Computer Data

Data or information stored on your computer may be kept on fixed hard drives inside the computer or on removable media such as CDs that can be inserted and removed. Removable media can be used to transfer files between computers or to back up data that already exists on fixed hard drives. There are three types of removable media: Magnetic, Optical, and Flash.

Magnetic storage

Magnetic storage: Hard drives, floppy disks, and digital audio tapes are examples of magnetic storage. They work through a read/write head, which creates and reads magnetic fingerprints on the disk.

The wrong side…

  • Magnetic fingerprint only lasts about five years
  • The capacity of most removable magnetic disks is too low for many file types

Optical storage

Optical storage contains information in digital form that is written and read by a laser. All CD and DVD devices are examples.

The bright side…

  • Increased capacity: one optical disc can store the same amount of data as over 500 floppy disks
  • Durability: They last up to seven times longer than magnetic storage forms

Flash memory (removable solid-state storage)

Solid-state memory (or Flash memory) is a high-performance, plug-and-play storage device that contains no moving parts. It is found in digital cameras, video game consoles and digital audio players. You can use it in the form of USB drives to transfer or backup data. Flash memory is small, light and fast.

Backup

Backup is the copying of files to portable media so that if your computer fails, the data is not lost to oblivion. Backup is generally common in large enterprises, but is often overlooked by individual users. Some suggest backing up data files and backing up your hard drive weekly. It takes about 45 minutes to back up a 500 megabyte hard drive.

There are two options – local or internet backup. Here is a list of local backup options. Most of them also serve as devices used to transfer data between computers.

  • Floppy disks
  • Zip Drives
  • CD
  • DVD
  • Flash Player

Internet Backup

Another backup option is to send your files to a website for safekeeping. If your computer crashes, you can simply download them from the site. Some examples of such sites are Backup Defender (www.backupdefender.co.nz) and My Backup (www.mybackup.co.nz). NB The author does not recommend or endorse any of the above service providers.

floppy disk

A floppy disk is a 3.5 inch removable magnetic disk. The older version, the floppy, is 5.25 square inches and flexible. Copying to diskette is fast and economical.

Ideal for…

  • Those who use their PC for their personal finances – the floppy disk is used to retrieve balances from checkbooks etc.
  • Projects that need to be backed up permanently, such as a movie script, as this is a cheap alternative.

Not so good for…

  • Some newer models of computers and laptops that do not have a floppy disk or floppy disk drive installed.
  • Large amounts of data because floppy disks do not have a large storage capacity

Zip Drives

A Zip drive is a small square-shaped magnetic disk, ideal for backing up your PC. The 100 megabyte size contains the equivalent of 70 diskettes. They also come in a size of 250 megabytes

Ideal for…

  • Duplicate your entire disk drive
  • Archiving
  • Storing graphic images or other large files
  • Transferring large files
  • Separating certain data from files on your hard drive

The wrong side…

  • They seem to be short-lived technology – most computers don’t have a Zip disk drive installed and opinion varies on how long they’ll be around.

Compacts discs

There are different CD standards that have different capacities. Just to confuse us, they are recognized by seemingly similar acronyms; CD-R, CD-RW, CD+RW, DDCD and E-CD.

CD-R

The CD-R (Compact Disc – Recordable) is a CD that can only be recorded once. It typically contains 74 minutes of audio or 650MB of data, although newer versions contain up to 80 minutes of audio (700MB of data). If your PC has CD burning software and a compatible CD-R or CD-RW drive, the CD-R can be used in the same way as a floppy disk. However, unlike a floppy disk, it cannot be deleted or overwritten. Watch out for CD-Rs that have an extra layer of protection that makes them less susceptible to damage from scratches.

Ideal for…

  • Make music CDs
  • Photo storage
  • Storage of permanent data

Not so good for…

  • Transfer files as they can only be used once

CD-RW/CD+RW

CD-RW (Compact Disc Rewritable) and CD+RW can be recorded as many times as desired. Data can be overwritten and erased. Other than that, CD-RW is identical to CD-R. Without their limited durability, CD-RWs and CD+RWs could be reused endlessly.

Ideal for…

  • Files transfert
  • Keep temporary data

Not so good for…

  • Hold important permanent files in case they are accidentally deleted

Dual Density CD (DDCD)

This disc has much more storage capacity than an average CD-R or CD-RW.

Ideal for…

  • Backup
  • Archive data storage

Improved CD

Enhanced CD (E-CD) is an audio CD with added CD-ROM data. CD-ROM data is added to the space not occupied by audio. Recording artists can use it to include videos, lyrics, interviews or promotional material. The E-CD can be played on a CD player, but to view additional material you must have access to a multimedia compatible device, such as a CD-i, DVD-ROM or CD-ROM player .

Deck discs

A CD-Bridge disc contains additional information on a CD-ROM XA track. The disc can be played either on a CD-i player connected to a television, or on an XA CD-ROM player connected to a computer. Software such as Photo or a karaoke CD player can be a lot of fun with the Bridge Disk.

DVD (digital versatile disc)

Although DVDs are more associated with video, they can also contain audio and computer data; hence their name Digital Versatile Disk. Like the CD, a DVD is a disc of 120 mm by 1.2 mm thick. However, DVD has more tracks than CD and therefore contains much more data. CDs have a constant storage capacity of 750MB, while DVDs store up to 17GB.

A range of acronyms are also used to distinguish between the different DVD types and capacities available. These include DVD-ROMs, DVD-Rs, DVD-RWs, DVD+RWs and DVD-Audio.

DVD-ROM

DVD-ROM (Digital Versatile Disc – Read Only Memory) is similar to a movie DVD, but is designed for computers. DVD-ROM stores data in the same way as CD-ROM and is used in your PC’s DVD-ROM drive.

The bright side…

  • Larger storage space – holds more data than a CD
  • Can be filled with almost anything; computer specific video, music or data
  • A base speed of 1.32 megabytes/sec

The wrong side…

  • Many older computers do not have a DVD-ROM drive installed
  • Can only be registered once

DVD-Audio

DVD-Audio (DVD-A) is designed for high quality audio and music. Its storage capacity is seven times that of a CD and offers at least twice the sound quality. Like the Enhanced CD, DVD-A may contain other data, providing the listener with additional information such as lyrics or pictures. DVD-A is predicted by many to replace the standard audio CD in the music industry.

DVD-R

Like CD-R, DVD-R (Digital Versatile Disc-Recordable) can be recorded only once.

The bright side…

  • A DVD-R can contain an assortment of information; video, text, audio and computer data
  • A DVD-R can be played on your normal DVD-video player, but remember that if you have additional data which is not of the same format, for example video and audio together, you will need a DVD-player. ROM or any multimedia.
  • A DVD-R plays at the same speed as commercial DVDs

DVD-RWs and DVD+RWs

Similar to CD-RW, a DVD-RW or DVD+RW (Digital Versatile Disc – Rewritable) can be recorded, rewritten and erased many times. Other than that, they are identical to DVD-R. The minus and plus DVDs are just different versions with the same features.

The future of CD/DVD storage

Most of the technology industry predicts that DVDs, with their greater storage capacity and faster access times, will soon replace CDs. DVD-ROM drives are likely to be sold with new computer systems in the same way CD-ROM drives once were. However, we are always at the forefront of new technologies, such as HD-ROM.

HD-ROM (high density read-only memory)

HD-ROM uses a more precise particle beam to write data. This allows information to be written on more durable materials such as metal, so storage is virtually permanent. HD-ROM has hundreds of times the storage capacity of CD-ROM.

USB flash drives

A thumb drive is a small, portable USB drive that holds between 1MB and 1GB of data. It’s surprisingly lightweight and is often worn around the neck or worn as a funky keychain. They are compatible with any PC with a USB port and with Mac OS 9 and OS X, Windows 2000 and XP or Linux 2.4.17.

The bright side…

  • Durable – more than CDs or DVDs
  • No batteries or separate power source required
  • Convenient – your computer should recognize the extra drive as soon as you insert it into the USB port
  • Ideal for backup
  • Larger storage capacity than many other portable devices
  • More portable than ZIP drives, CDs and floppy disks
  • Fast transfer rate (about 1Mb/sec)
  • Edit, rewrite, delete as many times as you want
  • Help desk personnel can use USB drives as a portable toolkit of system updates and recovery tools.

The wrong side…

  • More expensive than other portable devices
  • Viruses – The portability and compatibility of the flash drive increases the chances of spreading viruses. In many cases, viruses carried by a flash drive will not be detected because most anti-virus software is reactive and only recognizes known viruses.
  • Theft – a flash drive can facilitate data theft from an unlocked PC
  • Little security – the size and weight of the Flash drive makes it very easy to misplace. Most have little or no security features and the data is easily accessible. Some flash drives have built-in security; either a password or, in some cases, a fingerprint system – but that comes at a price.

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