Path: csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: =?UTF-8?Q?Niocl=C3=A1s_P=C3=B3l_Caile=C3=A1n_de_Ghloucester?= Newsgroups: it.comp.hardware.cd,nl.comp.dvd-branden,comp.publish.cdrom.hardware,rec.video.dvd.misc,it.comp.hardware.dvd,alt.comp.periphs.cdr Subject: dvdisaster or QuickPar or etc.: do you use them to secure discs? Date: Sat, 6 Dec 2025 01:05:54 +0100 Organization: A noiseless patient Spider Lines: 249 Message-ID: <4ab6702f-a8ca-bb87-bcf4-3856fd1ce393@irrt.De> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="708268602-406745482-1764979557=:2678842" Injection-Date: Sat, 06 Dec 2025 00:05:58 +0000 (UTC) Injection-Info: dont-email.me; posting-host="fa1ffd9c7a8fb78c03158abceabec7be"; logging-data="2046815"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/WAuIjgNcaHLrwNKlMb3BlS/JnUz1s9p4ajX55GCYKrw==" Cancel-Lock: sha1:o58o0n+PkNfYvO+zzaK+ZXRXQvg= Xref: csiph.com it.comp.hardware.cd:136 nl.comp.dvd-branden:736 comp.publish.cdrom.hardware:25 rec.video.dvd.misc:110 it.comp.hardware.dvd:1260 alt.comp.periphs.cdr:21 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --708268602-406745482-1764979557=:2678842 Content-Type: text/plain; format=flowed; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE |----------------------------------------------------------------------| |"Re:Timely article... (Score:3, Informative) | |by WuphonsReach ( 684551 ) on Saturday January 24, 2004 @12:01PM | |(#8075344) | |TY's (as the other posted commented) are reported to be the best CD-R | |/ DVD-R that you can get. [. . .] | | | |In addition you should be looking to add parity/recovery data to your | |CD-R/DVD-R backup files, which serves two purposes: (a) allows you to | |verify that the files are still readable and intact (b) allows you to | |recover damaged files if you have enough recovery data. It allows you | |to recover from scratches that the underlying ECC was unable to | |correct for. | | | |The easiest product to use right now is called PAR or PAR2 | |[sourceforge.net] (I prefer QuickPar). Basically, put all of your | |files in a single folder (or zip things up into seperate archive files| |and put those in a single folder) and then use QuickPar to create | |recovery data. For a CD-R, I usually collect around 650Mb of data | |together, and then create another 45Mb of recovery data. For DVD-R, I | |do 4Gb of data and 0.35Gb of recovery data." | |----------------------------------------------------------------------| says HTTPS://SlashDot.org/story/04/01/24/0054242/guide-to-digital-preservation-f= rom-nist Do you use anything like them? |----------------------------------------------------------------------| |"profdredd - 2006-12-24 | |I'd like to use QuickPar, or par2cmdline, to protect archives stored | |on CD-R and DVD-R media. Is there a tutorial or FAQ describing in | |detail how to do this? | | | |By "archive" I mean data frozen in permanent storage on optical | |discs. I don't mean a "backup" where the data also exists on the PC, | |or other media besides optical disc. In this scenario, I feel the | |parity recovery capabiltiy provided by Par2 is very valuable. | | | |I've read the documentation for QuickPar, but it only covers Usenet | |usage. I've also read the tutorials linked from the QuickPar site, but| |they only cover Usenet usage. | | | |I've read the forums on the QuickPar site, every single message in | |"Using QuickPar with CDRs and DVDRs". The thread which seems most | |informative is "QuickPar Media Recovery - My Tests & Techniques", but | |it doesn't suffice as a tutorial. There doesn't seem to be much | |agreement about the best way to use Par2 data on optical media. | | | | | |Nobody/Anonymous | | | |Nobody/Anonymous - 2008-06-16 | |Have you try DVdisaster? They are pretty about that, free and | |cross-OS." | |----------------------------------------------------------------------| says HTTPS://SourceForge.net/p/parchive/discussion/96207/thread/7732c181/?limit= =3D25# before more answers. HTTPS://dvdisaster.JCea.Es/downloads/manual.pdf says: |--------------------------------------------------------------------------= -| |"This is the orange manual, describing the usage of dvdisaster, a tool = | |for creating error correction data (=E2=80=9Cecc data=E2=80=9D) for optica= l media such | |as CD, DVD and BD discs. Use cases for creating ecc data, recovering = | |defective media using ecc data and for general maintenanance of = | |optical media are given. [. . .] = | | = | |Copyright 2008-2017 Carsten Gn=C3=B6rlich. = | |Copyright 2019-2021 The dvdisaster development team. = | |Verbatim copying and distribution of this entire article is permitted = | |in any medium, provided this notice is preserved. = | | = | |[. . .] = | | = | |Preface = | |After the publishing of version 0.79.5, the project has been dormant = | |for another half decade. As time has passed by, it is foreseeable that = | |optical media will become extinct just like floppy discs did long = | |ago. Still, it is important to preserve the contents of already = | |existing optical media. Towards this end, we will maintain dvdisaster = | |to keep it usable on current hardware and OS versions. = | |[. . .] = | | = | |[. . .] = | | = | |1 Overview = | | = | |The challenge: Optical media eventually fail. Optical media = | |(CD,DVD,BD) keep their data only for a finite time (typically for many = | |years). After that time, data loss develops slowly with read errors = | |growing from the outer media region towards the inside. = | | = | |The dvdisaster solution: Archival with data loss = | |protection. dvdisaster complements optical media (,=E2=86=92 supported med= ia) | |with error correction data in a way that they are fully recoverable = | |even after some read errors have developed. This enables you to rescue = | |the complete data to a new medium. = | |Error correction data, in short =E2=80=9Cecc data=E2=80=9D, is either adde= d to the | |medium or kept in separate error correction files. dvdisaster works at = | |the image level so that the recovery does not depend on the file = | |system of the medium. The maximum error correction capacity is = | |user-selectable. = | | = | |1.1 Common misunderstandings about dvdisaster = | | = | |Before we describe in detail what dvdisaster can do, let=E2=80=99s first = | |clarify what it can=E2=80=99t: = | | = | |dvdisaster can not make defective media readable again. Like a = | |conventional backup, error correction data must be created from a = | |fully functional optical medium - you can not backup data which has = | |already been lost. When the optical medium develops defective sectors = | |at a later time, those defective sectors are restored by = | |re-calculating them from the ecc data. This won=E2=80=99t make the defecti= ve | |medium working again, but will produce a new iso image which can be = | |written to a new medium. = | |As said before, ecc data can not be created from already defective = | |media. Although unreadable sectors can not be recovered in that case, = | |dvdisaster might still be helpful in extracting the remaining readable = | |portions of the medium. = | | = | |[. . .] = | | = | |BDXL-R = | |=E2=80=A2 Currently only the three-layered (100GB) version is tested and s= upported.| |=E2=80=A2 Note: BDXL is not backwards compatible with standard BD drives. = | | = | |Not usable types (image can not be extracted): = | |=E2=80=A2 BD-ROM (pressed BDs), DVD-ROM (pressed DVDs), CD-Audio and CD-Vi= deo. | | = | |[. . .] = | | = | |Q 3.5: My self-written media is recognized as =E2=80=9CDVD-ROM=E2=80=9D an= d rejected. | |The medium book type has probably been set to =E2=80=9CDVD-ROM=E2=80=9D. T= ypically, a | |drive capable of writing the same media format is required for = | |processing the medium with dvdisaster. = | |For example, a two-layered DVD+R with a wrong book type may only be = | |accepted on a writer which can write to such media. Try another drive = | |for reading images in these cases." = | |--------------------------------------------------------------------------= -| |-------------------------------------------------------------------| |"Nobody/Anonymous - 2006-07-22 | |Is there any point in using par for insurance for CDs for data and | |system backups? Involves a wild variety of file sizes and directory| |structures. Would it be as easy as just making 3 CD copies for each| |required, using an expensive brand of course (how else can you tell| |which really have 'long life')? When CDs fail, typically, does the| |whole become inaccessible, or is it file-by-file? | | | |Ol' Bab" | |-------------------------------------------------------------------| says HTTPS://SourceForge.net/p/parchive/discussion/96207/thread/b235af8b/?limit= =3D25#9173/8fa4 before many responses. Thanks in advance for feedback! --708268602-406745482-1764979557=:2678842--