How Many Times Can You Actually Rewrite a DVD±RW? One Engineer Tested It to Destruction

You probably haven’t thought about rewritable DVDs in years. Fair enough. But someone did — and the results matter more than you’d expect for anyone working in data archival, legacy media preservation, or optical storage reliability.

Gough Lui, an Australian engineer and prolific hardware tester, has published the second part of a methodical endurance test on DVD±RW media, pushing discs through hundreds and even thousands of rewrite cycles to find out when they actually fail. The official spec from the DVD Forum and DVD+RW Alliance claims around 1,000 rewrites. Lui wanted to know if that number holds up in practice — or if it’s conservative marketing, or worse, optimistic.

The answer is complicated. And genuinely interesting.

The Methodology: Controlled Abuse at Scale

Lui’s approach was thorough without being academic to the point of impracticality. He used consumer-grade DVD±RW discs from multiple manufacturers — including Verbatim, Maxell, and some lesser-known brands — and ran automated full-disc rewrite cycles using a consistent drive and verification process. Each cycle involved writing a full disc image, then verifying the data against the source. When verification errors appeared, he logged them. When discs became unreadable or unwritable, he called it.

The testing rig used ImgBurn for writes and verification, with scripted automation to keep the process consistent across hundreds of cycles per disc. He also tracked PI/PIF error rates (Parity Inner/Parity Inner Failures), the standard quality metrics for DVD media, using tools like Opti Drive Control. This matters because a disc can technically still be “readable” while throwing off error rates that would make any professional archivist wince.

Temperature, humidity, and drive firmware were all held as consistent as practically possible in a home lab environment. Not a cleanroom. But controlled enough to produce meaningful comparative data.

The Results: Spec Claims vs. Reality

Here’s where it gets interesting. The brand-name Verbatim DVD+RW discs performed remarkably well — many exceeding 1,000 cycles before showing significant degradation. Some pushed past 1,500 cycles with error rates still within acceptable bounds. The DVD+RW format generally outperformed DVD-RW, which aligns with the format’s design: DVD+RW uses a more sophisticated defect management system and doesn’t require full formatting between rewrites in the same way.

Cheaper, off-brand discs told a different story. Several failed well before 500 cycles. One disc became unwritable at just 232 cycles. The gap between premium and budget media wasn’t marginal — it was enormous.

A few key takeaways from Lui’s data:

• DVD+RW consistently outlasted DVD-RW across comparable brands
• Verbatim discs (made with Mitsubishi Chemicals’ dye formulations) were the clear winners in longevity
• Error rates climbed gradually, then spiked — failure wasn’t always linear
• Write speed affected longevity; slower writes generally produced better long-term results
• Some discs that “passed” verification were already showing PI error rates that would concern anyone relying on that data long-term

That last point is the quiet bombshell. A disc can pass a binary read/write check while already deteriorating underneath.

So what does this mean practically? If you’re still using DVD±RW in any professional or archival capacity — and some industries absolutely are, from medical imaging to broadcast — media quality and brand selection aren’t trivial choices. They’re the difference between a disc that lasts through its rated lifecycle and one that doesn’t make it halfway.

And for the growing community of data hoarders and digital preservationists who’ve returned to optical media as a hedge against bit rot on hard drives and the ongoing costs of cloud storage, Lui’s work provides something rare: empirical data rather than manufacturer claims.

Why This Still Matters

Optical media has a strange position in 2026. It’s simultaneously obsolete for most consumers and quietly persistent in specific professional contexts. The ISO/IEC 17344 standard still governs DVD+RW specifications. Archival-grade optical media (M-DISC and similar) has carved out a niche. But standard rewritable DVDs? They’re the workhorse nobody tests anymore.

That’s precisely why Lui’s work has value. Nobody else is doing this testing publicly with this level of rigor. The last comparable independent endurance tests on DVD±RW media date back to the mid-2000s, when the format was still commercially relevant enough to attract attention from publications like CDRInfo and CDFreaks (now MyCE).

Lui himself acknowledges the limitations — sample sizes are small, the testing environment isn’t industrial-grade, and the drives themselves introduce variables. But the directional findings are clear and consistent enough to be actionable.

Budget media is a gamble. Format choice matters. And the 1,000-cycle claim? It’s a reasonable benchmark for quality media under decent conditions. But it’s not a guarantee — it’s a ceiling that only the best discs actually reach.

For anyone still relying on rewritable optical media, the lesson is blunt: buy the good stuff, verify often, and don’t trust a disc just because it hasn’t failed yet.