If you are comparing the Greaseweazle vs KryoFlux for Disklavier floppy preservation, my answer is straightforward: I recommend the Greaseweazle.
I have used multiple Greaseweazles, and I love them. They are flexible, dependable, affordable, and extremely well-suited to producing archival copies of aging floppy disks. I have an article detailing how to use a Greaseweazle to back up your Yamaha Disklavier floppy disks here. You can also visit the Greaseweazle GitHub page here and read more about them.
The Greaseweazle does not include a floppy disk drive. I use a TEAC FD245HF 3.5″ floppy disk drive with my Greaseweazle, which can still be found online as “new old stock.” These are available on eBay. See my article on recommended floppy disk drives. The Greaseweazle does work with any functional floppy disk drive, and I’ve also read and written disks using drives obtained from keyboards and old computers.
I had hoped to test KryoFlux directly. Regrettably, I was not able to obtain a KryoFlux because of the identity verification they required before ordering, which I found invasive. For instance, they were unwilling to send it without me providing them my home address. In an era of online privacy concerns, having a company do background research on me and demand personal information was not acceptable.
This is a practical recommendation based on real use with Greaseweazle, the published capabilities of both platforms, and the actual needs of Disklavier owners.
If you’d like to order a Greaseweazle, they’re available fully assembled on Tindie. You can also purchase a Greaseweazle from The Decromancer. You can even purchase a Greaseweazle fully assembled with a floppy disk drive from LeapMaker Storefront.
Use the Greaseweazle for Disklavier Disk Preservation
If your goal is to archive, back up, or recover Disklavier floppy disks, the Greaseweazle is an excellent choice. It gives you the kind of low-level disk access that matters for preservation work. You can create high-resolution archival copies of disks that are otherwise impossible to replace. You can do so even if you cannot read the disks on your computer. And you can readily convert disk images to formats that can be used on Gotek or Nalbantov USB floppy disk emulators.
That matters because old floppy disks do not usually fail all at once. They become inconsistent. One drive reads them, another does not. One pass works, the next throws errors. A proper preservation workflow is not just about opening files. It is about capturing the disk as faithfully as possible while it is still readable. The Greaseweazle will read the floppy disk over the course of multiple passes, and will automatically reattempt reading difficult sectors.
I used Greaseweazle’s software to create my Floppy Disk Image Conversion Tool. This tool allows you to convert between image formats. You can do this directly from the terminal using Greaseweazle’s convert tool, or you can do this using an online tool such as mine.
In other words, once you’ve made a high-quality image of a floppy disk using a Greaseweazle, you can freely convert it to other image types as desired using their software.
Why I Recommend Greaseweazle
- It is ideal for creating high-quality archival copies. Greaseweazle is designed to work at the flux level, which is exactly what you want when preserving disks that may be deteriorating. It produces extremely detailed, digital copies of the disks that can be used for analysis, floppy disk emulators, or duplicate disks. Customers often provide me with disks that are genuinely irreplaceable—old family recordings, or recordings by famous artists.
- It is versatile and plays well with the Nalbantov and Gotek. It can be used for raw captures as well as practical disk image workflows. The images it produces can be used with the Nalbantov USB floppy disk emulator or with Gotek drives.
- I have used it extensively. I have used multiple Greaseweazles and had excellent results. Over the years, I’ve copied thousands of floppy disks, and have been extremely pleased with this tool.
- It is open and flexible. The ecosystem is refreshingly usable for people who actually want control over the preservation process. They have very good support, both on their Wiki, and in the Greaseweazle Facebook group.
What About KryoFlux?
KryoFlux has a strong reputation in the floppy preservation world, especially in institutional and software-archival circles. Its likely advantages are not hard to imagine.
- A more polished or mature ecosystem in some preservation workflows
- Strong credibility in museums, archives, and forensic-style environments
- Good support for unusual formats and edge-case disks
- An official GUI that may appeal to users who do not want to work from the command line
Those may be real advantages. I am not dismissing them. If someone is preserving obscure copy-protected software or working in a formal archival setting, I can absolutely imagine KryoFlux being the preferred tool.
Why I Doubt I Am Missing Much Without KryoFlux
This is really the heart of it. Based on what Greaseweazle already does well, I cannot imagine I am missing anything important for the purpose of preserving Disklavier disks.
Disklavier owners generally need a tool that can:
- Create high-quality archival captures of aging floppy disks
- Help recover disks that may not read reliably in ordinary USB floppy drives
- Produce usable backup images
- Support careful preservation before a failing disk becomes unreadable for good
The Greaseweazle does that job extremely well.
Could KryoFlux have a few extra strengths? Sure. It may have more polish in some workflows, stronger name recognition in formal archives, or better support for niche edge cases. But for Yamaha Disklavier floppy backup and preservation, that does not automatically translate into a meaningful advantage.
Why Disklavier Owners Should Preserve Their Disks Now
If you own a Disklavier that still relies on floppy disks, the time to preserve them is now.
Floppy disks are aging media, and they do fail. Even disks that seem fine today may become unreliable tomorrow. Aging floppy disk drives can suddenly start destroying floppy disks if they become damaged, dirty, or misaligned. If a disk contains rare PianoSoft material, custom data, or anything else you do not want to lose, waiting is a gamble. See my article on why floppy disk drives fail.
This is exactly why I recommend making proper archival copies rather than depending on the original disks forever. A good preservation setup gives you a way to protect the data before the media reaches the point of no return.
I have a full article on using the Greaseweazle to preserve your floppy disks.
If a full, archival copy isn’t necessary and you simply want to get copies of the songs from your floppy disks, you can also use an external USB drive and Player Piano Floppy Disk Backup Utility.
Greaseweazle vs KryoFlux: My Recommendation
If you are comparing Greaseweazle vs KryoFlux because you want to preserve Disklavier floppy disks, I recommend Greaseweazle without hesitation.
I have used multiple units myself and have been genuinely impressed with them. They do exactly what I want a floppy preservation tool to do. KryoFlux may well be excellent too, and I can imagine a few areas where it might offer added polish or specialized advantages. But for Disklavier disk preservation, I do not believe I am giving anything up that matters.
You can order a Greaseweazle on Tindie. Alternatively, you can purchase a Greaseweazle from The Decromancer. Another option is to purchase a Greaseweazle fully assembled with a floppy disk drive from LeapMaker Storefront.
| Feature | Greaseweazle | KryoFlux |
|---|---|---|
| Price | ~$30-40 | ~$105 |
| Availability | Easy to obtain | More restricted |
| Flux-level imaging | Yes | Yes |
| Disklavier suitability | Excellent | Likely Excellent |
| Ease of purchase | Simple | Less convenient |
Need Help Preserving Disklavier Floppy Disks?
If you have Yamaha Disklavier floppy disks you want backed up or preserved, I may be able to help. This is one of the few areas where using the right tools before a disk fails can make all the difference.
The sooner the disks are imaged, the better the odds of a clean archival copy.
If you’d like for me to duplicate your floppy disks, you can order that service from me directly.
