Are some DVDs just manufactured to be unrippable?

[maskeeper]

I tried to extract a DVD boxset for STUDIO 60 ON THE SUNSET STRIP.

2 episodes would not rip, one title from Disc 3 and one title from Disc 6.
Repeated errors "corrupt or invalid at offset" at various locations. Eventually fail.
Tried cleaning the disc, no difference.
Tried 3 different DVD drives, same results.
All other title work fine, rip quickly-- but those two fail repeatedly.

Although the disc surface looks perfectly clean, I assumed it was a disc error.
So I just bought another copy.
Same result on DIFFERENT DISCS.
Repeated errors "corrupt or invalid at offset" at various locations.
Tried 3 different drives, same result.
All other titles work fine, these two collapse in repeated errors.

So is this just something unworkable? Did they create a disc that seems to play fine but cannot be ripped cleanly?

[Woodstock]

Some disks have manufacturing errors, and the entire lot will be unreadable at the same spot. I went through multiple sets on the Hercules TV series like that, INCLUDING disks from Netflix. I ultimately had to use a DVD-only drive to read the particular disk; none of my BD drives could.

If the location varies between copies, it is more likely a contamination issue. The longer disks are in their packaging, the worse they get. Check the "if you're experiencing rip errors" topic in the Bluray forum for ways to clean disks.

[thetoad]

I've ripped the us studio 60 on the sunset strip in the past, so i know for a fact that it was rippable about a decade ago.