Hello everyone, I would greatly appreciate your input on this matter:
For my bachelor thesis, I aim to explore the topic of long-term storage/archiving with a focus on optical storage media. I have spent the past few months conducting research on this subject and am convinced that Blu-ray Discs offer a meaningful solution. I am aware that this is a controversial statement, as many people harbor a strong aversion to optical media, but that is not my primary concern. What I need help with is the following issue:
Several scientific publications claim that the original burn quality has a certain impact on the medium's subsequent lifespan. I want to investigate this assumption by examining the burn quality of blank discs available today. The inspiration for this thought experiment comes from a study on cdrinfo.com, titled "Blu-ray Writing Quality Tests Vol 2." However, since this test took place in 2009, I believe it is appropriate to conduct a similar updated version. Test results from 2009 cannot be directly extrapolated to 2023, given the advancements in both drives and media.
Currently, I envision the following setup:
- Two identical drives will be used to burn the discs. The only difference between the drives will be their operating hours – one drive will be brand new, while the other will have accumulated several hundred, if not thousand, operating hours.
- Optical media from two different manufacturers will be examined.
- The optical drives will be connected to a PC dedicated solely to the burning and analysis of discs. Resources will be maximized for these tasks, and interference from other programs (mail, office, browser, etc.) will be minimized.
- The study will encompass not only Blu-rays but also CD-Rs and DVD-Rs.
- Various types of media will be tested, including consumer-grade, professional-grade, and "Archival-Discs." Each type of disc will be represented by multiple samples to prevent statistical outliers (e.g., 5 discs/type).
- Tools such as ImgBurn, Nero Disc Speed, and DVDInfoPro will be utilized.
Through this setup, numerous aspects can be examined, such as differences between manufacturers, disc generations (CD vs. DVD vs. BD), and potential variations between drives. For instance, there might be more write errors on the drive with many operating hours, requiring subsequent correction.
I have created a sketch to illustrate my idea; hopefully, it is comprehensible.
What are your thoughts on these ideas? Is it all complete nonsense? Have I overlooked something fundamental? I truly rely on your experience and expertise, as I currently lack an external perspective.
I am at a point where I might either a) give up and look for another topic or b) delve deeper into the rabbit hole. I am in the very early stages of my research, and if the experiment proves sensible and relevant, it would be conducted no earlier than spring 2024. Additionally, I would need to check if I can secure the necessary funding – another potential obstacle.
P.S., this is not only my first post on r/datahoarder but also on Reddit as a whole. :3
Hello! Thank you for taking the time to read through this post and share your thoughts. I'd also like to share my thoughts with you:
Blu-ray is not archival. This is likely true, and I share skepticism about the claimed lifespans from manufacturers. Some producers have marketed Blu-rays as the ultimate medium, with Panasonic, for instance, promoting TÜV Rheinland-certified discs with a 50-year archive life. (Quoting marketing materials: "The test result shows that Panasonic Blu-ray Discs offer more than 50 years of expected archive life at a room temperature of 25˚C and a relative humidity of 80%"). I've previously discussed the "trickery" in this field in another comment. All statements, whether from manufacturers or scientific sources, should be approached with caution.
CD-R is not archival. Interestingly, in some studies, CD-Rs perform decently, sometimes even better than later generations (DVD, BR). Several manufacturers sell "Archival CD-Rs," such as Mediarange with the product MRPL510 (gold-plated). The question is whether this is all just marketing or if these discs indeed have better properties. In my view, this question cannot be answered with a simple "yes" or "no," which is why I want to examine different models.
Thank you for your comment on the term "burn quality." I admit I need to be more precise in my wording. I also need to investigate which data I can truly capture and which I cannot. Temperature is an important and often overlooked factor. It seems that some drives can read internal temperatures, but I need to delve deeper into this. If I cannot measure internal temperature, I've considered measuring the temperature of the drive case to approximate a value.
Statistical relevance. You're absolutely right; the sample size is small, and the significance is limited. The question, however, should be whether we want to satisfy statistics or generate data that can help people in the real world. I live in Austria, where manufacturers like Verbatim and Mediarange are popular. Does it make sense to examine Ritek storage media if they are not available here? I want my work to provide answers about the current quality of popular blanks for those who may undertake a project with optical media.
I appreciate your mention of IBM. It's fascinating to see how strongly some companies take a position. Looking at marketing materials for Sony Everspan / Optical Archive products, one might believe optical storage is the answer to all questions. Cloud? Who needs it? But please, let's not get started on IBM. Last year, I attended a presentation on quantum computers, and IBM presented itself as a cool, hip, almost-startup. As a Steve Jobs fanboy, I must adopt his view on IBM. Thinking about it, I shouldn't like Blu-ray either, as Steve was not a big fan ("Blu-ray is a bag of hurt").
Regarding your last point about approval: Nothing is finalized yet. I've discussed it with my supervisor, and he didn't seem completely opposed. You're right; I need strong arguments to justify the relevance of the topic. Do I have all the arguments ready today? Honestly, no. However, I am convinced that optical media will continue to play a role. The exact nature of this role depends on many factors.
I want to thank you again for your input; it has been very helpful, and I will definitely consider it. If you have any more approaches or thoughts, please let me know!