Dvd rw dual layer

Dvd rw dual layer DEFAULT

Is there any DVD Dual Layer Re-Writable Media?

lexluthermiester said:

Nice! Those things were/are excellent for easy switching of OS disc's. I had the very similar JAZ 2GB drive and a bunch of disc's for years that served as swapable boot drives. Had DOS, Win311, Win95, Win98, WinME and WinXP(which was a tight fit). Depending on what I wanted to do, I'd use the correct disc. Once XP's compatibility mode got good enough I installed to a regular HDD and would only boot to the JAZ once in a while. Ah good times..

Click to expand...

I remember the Iomega Jazz drives. Much more expensive, but better, too. I've also got the Zip drives, in IDE and USB form, which still worked perfectly the last time I used them a few years ago.

I also remember the abuse I accidentally meted out to these SparQ drives. Please try not to whince.

I tended to forget to eject the cartridge properly, which resulted in me attempting to pull it out while it was still spinning and the head was accessing it, a few times. Total headcrash (with awful crunching noise) and disc stopped, with the cartridge jammed at an awkward angle! :eek::eek:You'd think that would wreck it, right? Nope, incredibly it still worked, but reliability did take a beating, even with new discs, so it was actually damaged from this. So embarrasing, lol. Thankfully, I never kept anything very important on them and yes, it was possible to install an OS on them and boot from, if rather slowly.


Sours: https://www.techpowerup.com/forums/threads/is-there-any-dvd-dual-layer-re-writable-media.111188/

DVD ± RW Dual Layer?

The wrong capitalisation of the thread title “Dvd±rw dl?” was enforced. Correct: ”DVD±RW DL”

Manual of WriteMaster SE-S224 mentions DVD-RW DL.


Wikipedia article mentions bitsetting of proposed DVD+RW DL.

LG BE14NU40 manual mentions DVD+RW DL: http://www.lg.com/us/support/products/documents/LG-DS-Spec-BE14NU40.pdf
Can anybody explain more? The ∓RW DL discs have unfortunately never been released, as far as I can recall.

Thread about it’s theoretical rewriting cycles:

Hello. It is a real pity, how generous projects such as HVD and DVD+RW DL were discontinued. But I have a question: *iF the DVD+RW DL was actually released (prototypes did actually exist as far as known), would it have 1000 rewrite cycles like normal DVD+RWs? (As far as I know, Sony claims having 2000 rewrite cycles. I can confirm however, that Sony’s DVD+RWs and -RWs, unlike their CD-R’s, have a really excellent quality.).

Link farm:

Are they ever going to make dual layer re-writables or is that not possible because of the whole second layer thing? Considering dual layer blanks are still way too expensive - I may as well pay 15$ for a couple of dual layer RW’s (if they make em) instead of 4$ for Dual layer write onces and end up just making coasters frowning Anyone know?

Today when checking the CDSpeed2000.com website for updates, I found mention of DVD-RW DL media. I found mention of such media on the net going back to 2005, as well as an article on CDRinfo from 2006 saying that +/-RW DL media is incompatible with hardware current at that time. Apparently, the first dual layer RW media was DVD-RW DL and was unveiled by JVC in mid 2007. So far, I see no burners on the market that support DVD-RW DL or DVD+RW DL media. Google product searches turn up results for…

Are they ever going to make dual layer re-writables or is that not possible because of the whole second layer thing? Considering dual layer blanks are still way too expensive - I may as well pay 15$ for a couple of dual layer RW’s (if they make em) instead of 4$ for Dual layer write onces and end up just making coasters frowning Anyone know?

Are there some rare DVD+RW DL vendors?

Imagine being able to record 4 hours instead of 2 hours of the highest quality DVD video on a disc. Or to store 8.5 gigabytes, equaling about 12 fully recorded CD-Rs, instead of 4.7 gigabytes, on a single sided DVD. All this is possible, here and now, with the advent of DVD+R Double Layer recording technology. Based on the proven double layer technology that has been used in DVD-Video for many years, DVD+R DL amost doubles the recording capacity when compared to traditional DVD recording media…


Hashtag: #DVDrwDL

Sours: https://club.myce.com/t/dvd-rw-dual-layer/399608
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JVC announces first rewritable single-sided dual layer DVDs

JVC announces first rewritable single-sided dual layer DVDs
Inventing the dual layer DVD-RW standard may seem like an extreme example of too little too late in the days of 15GB+ HD DVDand 25GB+ Blu-ray, but JVChas gone ahead and done it anyway. Hitting up the same 8.5GB capacity as regular double layer DVD-RWs and dual layer DVD-RWs, the JVC discs come with a specially hardened coating which is apparently "150 times" more effective than the coating on plain old DVDs. Unfortunately, the new format requires entirely new burners, is only available at 2x write speeds, and no shipping dates or details are available. Sounds like JVC's got a winner on its hands ... yeah.

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Sours: https://www.engadget.com/2007-08-31-jvc-announces-first-rewritable-single-sided-dual-layer-dvds.html
Plextor PX-77SA DVD+RW Dual layer


DVD Recordable Dual Layer

DVD+R DL (DL stands for Double Layer) also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. Its use was first demonstrated in October 2003. DVD+R DL discs employ two recordable dye layers, each capable of storing nearly the 4.7 GB capacity of a single-layer disc, almost doubling the total disc capacity to 8.5 GB. Discs can be read in many DVD devices (older units are less compatible) and can only be created using DVD+R DL and Super Multi drives. DL drives started appearing on the market during mid-2004, at prices comparable to those of existing single-layer drives. As of March 2011[update] DL media is up to twice as expensive as single-layer media. The latest DL drives write double layer discs at a slower rate (up to 12×) than current single-layer discs (up to 24×).

DVD+R DLCapacity
Physical sizeGB
12 cm, single/dual layer4.7 / 8.5
8 cm, single/dual layer2.6 / 5.2

Dual-layer recording[edit]

Dual-layer recording allows DVD-R and DVD+R discs to store significantly more data, up to 8.5 gigabytes per disc, compared with 4.7 gigabytes for single-layer discs. DVD-R DL was developed for the DVD Forum by Pioneer Corporation, while DVD+R DL was developed for the DVD+RW Alliance by Philips and Mitsubishi Kagaku Media (MKM).[1]

A dual-layer disc differs from its usual DVD counterpart by employing a second physical layer within the disc itself. The drive with dual-layer capability accesses the second layer by shining the laser through the first semi-transparent layer. The layer change can exhibit a noticeable pause in some DVD players, up to several seconds.[2] This caused more than just a few viewers to worry that their dual-layer discs were damaged or defective, with the end result that studios began listing a standard message explaining the dual-layer pausing effect on all dual-layer disc packaging.

DVD recordable discs supporting this technology are backward compatible with some existing DVD players and DVD-ROM drives.[1] Many current DVD recorders support dual-layer technology, and the price is now comparable to that of single-layer drives, though the blank media remain more expensive. The transfer rates reached by dual-layer media for both reading and recording speeds are still well below those of single-layer media.

There are two modes for dual-layer orientation, parallel track path (PTP) and opposite track path (OTP). In PTP mode, used for DVD-ROM, both layers start recording at the inside diameter (ID) with the lead-in and end at the outside diameter (OD) with the lead-out. Sectors are sequenced from the beginning of the first layer to the end of the first layer, then the beginning of the second layer to the end of the second layer. In OTP mode, the second layer is read from the outside of the disk.

For DVD-Video a variation of the technique is employed. DVD-Video is always recorded in OTP mode, but the video data is read from the beginning of the first layer towards the end of the first layer, when this ends (not necessarily at the end of the track) then reading is transferred to the second layer, but the video data commences from the same physical location that the first layer ends back towards the beginning of the second layer. This means that the 'start' of the second layer may not have any recorded material present. This is to minimize the time that the video player takes to locate and focus on the second layer and thus provide the shortest possible pause in the content as the layer changes.

A common misconception is that the disc spins first in one direction, and then another, either for PTP or OTP recording, when in fact DVD-Writers always spin a disc in the clockwise direction.[3] A simpler way to understand what's written above is to think of the little hole in the centre of the DVD as the "inside" and the rim of the DVD as the "outside". Since dual-layer DVDs have two data layers, placed one on top of the other – Layer 0 (L0) and Layer 1 (L1), there are two ways in which these two layers may be written to - L0, inside to outside and then L1 inside to outside again (PTP), or L0 inside to outside and then L1 outside to inside (OTP). OTP is usually used for DVD-Video, to prevent the inherent delay that PTP involves: in PTP, the laser head moves from the outside edge of the DVD to the inside to start reading L1 when it reaches the end of L0. This results in the video skipping or freezing up for some time as the laser head repositions itself and the system waits to start receiving data again.

Recordable DVD capacity comparison[edit]

For comparison, the table below shows storage capacities of the four most common DVD recordable media, excluding DVD-RAM. (SL) stands for standard single-layer discs, while DL denotes the dual-layer variants. See articles on the formats in question for information on compatibility issues.

Disk Typenumber of sectors for data (2,048 B each)capacity in bytesnominal capacity in GB
DVD-R (SL)2,298,4964,707,319,8084.7
DVD+R (SL)2,295,1044,700,372,9924.7
DVD-R DL4,171,7128,543,666,1768.5
DVD+R DL4,173,8248,547,991,5528.5

See also[edit]


  • Bennett, Hugh. Understanding Recordable & Rewritable DVD. Cupertino: Optical Storage Technology Association, Apr. 2004.
  • Bennett, Hugh. "DVD±RW DL—D.O.A.?" EMedia Xtra May 10, 2005.

External links[edit]

Sours: https://en.wikipedia.org/wiki/DVD%2BR_DL

Rw dual layer dvd

Optical Media

DVD media comes in several formats; including DVD+R (recordable DVD), DVD-R, DVD+RW (re-writeable DVD), DVD-RW, DVD-RAM (random access memory) and DVD-ROM (read only memory).

What are the differences among the formats?
The differences are as follows:

  • DVD-R and DVD+R record data one time only, then the disc is only readable
  • DVD-RW, DVD+RW and DVD-RAM allow you to record and erase data multiple times
  • DVD-ROM only reads data; you cannot save to this disc

What does the plus and dash found in the format mean?
When DVD media technology was first developed, the plus and dash formats used different writing and reading specifications. Today, most DVD writers and readers now work with no noticeable performance differences between plus and dash formats. Check with your manufacturers’ suggestion of DVD format for the best compatibility—especially in older technology.

In relation to DVDs, what does Double Layer recording mean?
Recording using a double layer DVD (also referred to as Dual Layer DVD by the +RW alliance) nearly doubles disc storage capacity with two recording layers on a single-sided disc. Verbatim’s parent company, Mitsubishi Chemical Media (MCM), pioneered this technology—bringing the first double layer DVD media to the market. Verbatim’s DVD+R DL are considered to be one of the best DL media available, featuring almost no compatibility issues, along with quick and flawless burn speeds.

So how do I know which DVD to use?

Recordable DVD media is a natural choice for data archiving and backup. Choosing a DVD+R or DVD-R is ideal, as these write once discs prevent contents from being erased or mistakenly replaced. Also, to extend the life of your DVD disc, consider Archival Grade DVDs, which include a gold layer that is naturally resistant to corrosion and offers greater protection than standard silver discs. DVDs are also a great option simple data backup. Using DVD+RW/DVD-RW or DVD+RAM/DVD-RAM re-writable media allows content to be added and edited as the information changes.

Sours: https://www.verbatim.com/subcat/optical-media/dvd/
Toshiba Samsung TS-H653 16x DVD-RW(+/-) Dual Layer SATA Writer Drive Tested Good

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