Catalina keeps crashing after install of 10.15.3 - happens after "wake"

Dear all,

many thanks for your various comments and suggestions. It seems that for me 10.15.3 was a disaster from end to end, as far as my LaCie 2Big 16 was concerned.

I got it to work after a fashion by changing the connector from the MBP away from the TB3 connector on the LaCie 2Big to the USB-C 3.1 (same cable, same drive, "other" input connection). I upgraded the drive's firmware to the latest version as that was available but this made no difference to my problem.I continued to have terrible waking problems if the drive was connected (shutting the system down completely even though it was supposed to have just gone to sleep) making me sign in when I had specifically disabled that function etc etc.

Along comes 10.15.4, which I installed a few days ago and all is sweetness and light!!!

Without doing anything to the drive or the cable or anything else, my MBP does exactly what it is told to do, sleeps and wakes exactly as it is supposed to and never crashes!

I have now changed the connection on the LaCie 2Big 16 back to TB3 and it all still works like a dream.

What is most frustrating, especially given how long Catalina has been out, is that none of my symptoms are documented, even given the consistent crashed that I reported to Apple, neither is that fact that Apple have done something significant to the sleep/wake part of the OS with 10.15.4 and fixed a ton of problems.

I am however, very thankful they have and now I feel I have my performing MBP back again, for the first time in nearly two months.

Roger

I don't think JLJ225 has the same problem as me (although anything is possible!)

I have narrowed my crash down to a single Raid disk drive (LaCie 2BigT3), amongst several other spinning drives connected. The drive has worked faultlessly for over a year connected to Mojave and now, after updating to Catalina I can guarantee that the MBP will crash every time the drive is connected and the system wakes up.

I have updated the drive's firmware and now Catalina is saying that the cable isn't Thunderbolt compatible (yet it works perfectly with a Samsung T5 ssd on the same system!).

If I connect the cable to the LaCie 2BigT using the USBC 3.1 connector on the drive (same physical connector) but leave the other end of the cable connected to the same Thunderbolt port on the MBP, I NEVER get a crash and have been running like that for the past five days without problems.

So for me the problem is specifically to do with power management over the cable (the crash was always identical) but I can't spend any more time debugging Catalina at the moment. I have sent my five crashes off to apple and I will await their conclusions.

I'm saying that if LaCie have come out with a specific Firmware update for your disk to help run under Catalina, then trying it can do no harm - My system now works but only after I tried it through the USB 3.1 connector on the disk drive (as an alternative to the two Thunderbolt connectors).

So in answer to your question,. I don't think it has cured it but I have got round the problem and at least I am now on the latest version of everything so no support person can tell me to upgrade this or that - I've done it!

There are a number of updates to the LaCie firmware (on the drive) that are concerned with Catalina so it may be worth looking into what they say about TB2 and Catalina on their website here.

Yes but have you migrated your drive to that latest version of the LaCie Raid Manager V2 version 2.9.2? On mine (TB3) it updated the firmware on the actual disk.