@jonathon are you using your LINSTOR/DRBD stack in the form of licensed XOSTOR? Your issue looks a case for pro support. Did you consider opening a case with pro support?

@poddingue yeah I saw it now but I was more like mentioning that many people also have the same problem. Hope it gets resolved soon

No need to go to this page (which I wasn't aware of). Just using "@" followed by the team name is enough to get them a notification. So... They already got one, as I used this contraption in a previous message of this thread.

@pedro_udifar Hi, You can try again with minPartSize=100000000 indeed. But I would advise you to contact B2 directly. They should have a clearer error to show instead of a 500. Thanks for your patience and your help

Got this issue since 2026-07-12.

@john.c Unfortunately, I cannot answer your question in the affirmative. I only use XCP-ng with TrueNAS. @Team-Storage have y'all had a chance to take a look at the bug report I filed? This issue is quite serious.