bitaholic wrote: ↑Sun Mar 17, 2019 11:49 pm
Woodstock wrote: ↑Mon Jul 30, 2018 10:02 pm
Pretty much - the drive goes into "don't bother me, kid, I'm working here" mode, and the operating system throws a tantrum (error).
Unfortunately, with the acquisition of a newer LG drive for UHD work, I'm starting to see these errors myself. The new drive seems to be so anxious to get the data that it forgets to talk to the operating system. I had thought they were limited to power problems on USB, but the drive firmware can cause it, too.
(and no, I haven't reflashed from the factory)
Have you continued to encounter IPC errors with your LG drive since this post in Jul-2018, Woodstock? I recently purchased the OWC Mercury Pro Blu-Ray enclosure (LG WH16NS40 drive, v1.03 firmware) and have been getting a lot of IPC errors during Blu-Ray rips (but not during DVD rips). The drive has its own power supply, so I don't think I'm experiencing power availability issues. I'm finding the IPC errors start at seemingly random offsets on a given disc, and it's coming up during a high percentage of rips (probably >50% of BR discs attempted; n=20 or so), so I don't think it's an issue of disc quality either. Really just seems like the drive and Mac OS X stop talking to each other mid-rip. By the time MakeMKV generates a rip failure error message, checking the status of the drive in Finder reveals that it is no longer mounted by the OS.
At this point, I'm not sure if I should: (i) Try to get OWC to send me a different drive, (ii) Try to modify the drive's firmware, (iii) Contact Apple to to see if this is a hardware issue with the 2018 Mac Mini I'm using, or (iv) Something else?
In my case, I figured out exactly what was happening. Because MakeMKV has the [SAFE] flag, and having tried 3 times before to rip the same exact disc, I knew exactly
when the problem was happening. I knew the minute and approximate second the problem would manifest itself.
Then, I disconnected all other peripherals connected to all my other USB ports that could be using energy, and watched the rip like a hawk for the exact moment it was meant to happen... And, it turns out it was exactly when the drive is switching from the first layer on the BD to the second one. I knew this because I could see how much data had been read, and it was right around the 25GB mark, when the DL BD runs out of space on the first layer. This time, possibly because I had made sure all USB power to the ports are dedicated to the drive, when the time came, I heard the drive slowing down and struggling a bit, as it was trying to switch layers, the [SAFE] flag came on, and this time the rip was successful (4th attempt, same disc). So, there you go folks.
Now, I would suggest "documentation" is better on this issue. Actually, although it's great to have the forums, I would very much like to see well put together documentation and a manual for MakeMKV. The forums are long... Difficult to find what I need most times... Charge more for it if necessary, hire a professional talented technical writer to create both the documentation as well as the manual. Just my two cents. (Yes, I did pay for my license. The money is well deserved, and it should be more than what I paid for. When times are better on my side, I'll try and donate more.)
Cheers guys. R.