Ritek produces M-DISC Blu-ray media, sold under the Ritek and M-DISC brands. With the first DVD M-DISCs it was difficult to determine which was the writable side of the disc, so coloring similar to that on standard DVD discs was added to later discs to help distinguish the sides.ДЄsus, LG Electronics, Lite-On, Pioneer, and Verbatim produce drives that can record M-DISC media. Available recording capacities are similar to other optical media from 4.7В GB DVD-R to 25В GB, 50В GB BD-R and 100В GB BD-XL. Recorded discs are readable in most conventional drives. The performance was better than several DVD brands using organic dyes, where discs were not always readable after 250 hours slightly lower than another brand which achieved a lower read error and was rated '250 hours' much less than glass DVD technology ( Syylex) which was rated 'more than 1000 hours'. ДЄccording to an accelerated aging test of the French National Laboratory of Metrology and Testing at 90В вЊ (194В вЏ) and 85% humidity, the DVD+Rs with inorganic recording layer like M-DISCs were still readable after 250 hours, however with an error rate above threshold, and were rated 'less than 250 hours' equivalent to competing offers. 'The discs were subject to the following test conditions in the environmental chamber: 85В вЊ (185В вЏ), 85% relative humidity (conditions specified in ECMA-379) and full-spectrum light'. Department of Defense found that M-DISC DVDs are much more durable than conventional DVDs. Naval Air Warfare Center Weapons Division of the U.S. Durability claims ДЄccording to Millenniata, the U.S. While the exact properties of M-DISC are a trade secret, the patents protecting the M-DISC technology assert that the data layer is a ' glassy carbon' and that the material is substantially inert to oxidation and has a melting point of 200вЂ“1,000В вЊ (392вЂ“1,832В вЏ). The debt holders subsequently started a new company,, to sell M-DISCs and related services. When the obligation for conversion was not satisfied, the company defaulted on the debt payment and the debt holders took possession of all of the company's assets. Under the direction of CEO Paul Brockbank, Millenniata had issued convertible debt. officially went bankrupt in December 2016. The company was incorporated on May 13, 2010, in American Fork, Utah. was co-founded by Brigham Young University professors Barry Lunt and Matthew Linford, along with CEO Henry O'Connell and CTO Doug Hansen. M-Discs are readable by most regular disc drives. The M-DISC DVD looks like a standard disc, except it is slightly thicker and almost transparent. Millenniata claims that properly stored M-DISC DVD recordings will last 1000 years. M-DISC's design is intended to provide greater archival media longevity.

High-Definition Versatile Multilayer Disc (HD VMD).

HD DVD: HD DVD-R, HD DVD-RW, HD DVD-RAM.

Blu-ray Disc ( BD): BD-R & BD-RE, Blu-ray 3D, Mini Blu-ray Disc.

DVD: DVD-R, DVD+R, DVD-R DL, DVD+R DL, DVD-R DS, DVD+R DS, DVD-RW, DVD+RW, DVD-RAM, DVD-D, DVD-A, HVD, EcoDisc, MiniDVD.

Compact disc ( CD): CD-DA, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, Super Audio CD ( SACD), Photo CD, CD Video ( CDV), Video CD ( VCD), Super Video CD ( SVCD), CD+G, CD-Text, CD-ROM XA, CD-i, MIL-CD, Mini CD.

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