We were using two identical Nuendo 7 machines for television multitrack acquisition on a multi-hour live show. One machine was exhibiting bad drive performance resulting in timeline stalling and drive performance meter peaking. This was with only 64 tracks recording, we usually record more. Normally this is a drive issue but investigation indicated it was Nuendo.
Activity Monitor indicated Nuendo was reading twice as much data off the drive as it was recording, 30-40 MB/s read rate simultaneously with 8-20 MB/s write rate. Nuendo specifically was doing the excessive reading, not another process. The other machine was not doing this. Both of these machines are new and in the last month have been extensively tested with 192 track recording, performing very well; we do extensive testing before deployment in a production environment.
The excessive read rate continued for at least 30 minutes with no slowdown. The next commercial break I stopped record and started again but that did not correct it. The other machine was not exhibiting a significant read rate. On the next commercial break I rebooted the machine and for the next two hours it ran fine with no significant read rate.
New project, no previously existing files, nothing in the timeline. Waveforms set to render while recording as always. Identical machine and Nuendo configurations.
Usual stuff - logged out of iCloud, WiFi turned off, Spotlight Privacy on the record drives, no significant background processes. As noted it was Nuendo doing the excessive reading not another process.
Mac Mini 2012 quad-core i7 with 16GB ram
Sonnet xMac Server expansion
RME MadiFX card
External usb3 drive
Any ideas? Obviously when this system gets back I’m going to wipe it and start over but this is concerning. These are the second and third of our machines with Nuendo 7, the other six are all running earlier versions. I can’t imagine why Nuendo would be reading that much data for that long with nothing playing back.
Thanks for any information,