We have reported this issue to Apple (FB8889774) and we are currently awaiting a response. Some Big Sur cloned volumes do not appear in the Startup Disk Preference Pane, despite being perfectly bootable. In the past, the Startup Disk Preference Pane would list all available startup volumes, including volumes cloned by CCC (whether CCC used ASR or its own file copier). If that's not possible send it to me here and I'll examine it: Please Log in to join the conversation.Some Big Sur startup volumes don't appear in the Startup Disk Preference Pane Then attach that as a file to a post (do not post in line). txt file or select all with CTRL+A, copy/paste it from the crash dialog to TextEdit, then save that as a file. If FCP still crashes it should raise a dialog. You are on 12.4 (which should be OK) but I've seen FCP preference files somehow get damaged during a MacOS upgrade. Try the simple things like reboot the machine, verify you have plenty of disk space, reset FCP preferences, create a test library and simple test project, try to drag the same clip to that. I assume you are running SoftRAID? Make sure you are on the latest version and check if any problems are reported in their support forums for Monterey 12.4, esp. It might be some kind of permissions issue FCP is not handling properly. Go to System Preferences>Security & Privacy, select Full Disk Access and in the right pane select FCP. It's not because it's "too fast", otherwise the much faster Mac Studio internal SSD would make it crash. I formatted each drive as APFS and set the Chunk size to 128k.Now FCP is jumpy & crashing on a simple drag clip to timeline.Any thoughts or solutions for this?.Are things too fast now? I just built a 4 x 2TB NVME Raid 0 in an OWC Express 4M2. However I see on other forums some LaCie owners saying they went to SoftRAID or switched to USB 3.1 on the LaCie array and it worked better: /forums/thread/669095 Why your system is stuck at 50 MB/sec, I don't know. ![]() So if LaCie says they are waiting on Apple for something, I'd be curious about what since SoftRAID has already delivered a similar software-based RAID product. It is apparently possible to do that on *current* versions of MacOS because SoftRAID is shipping a product. 3rd-party software or drivers would be required and those must work with Apple Silicon. Here are their procedures for Apple Silicon maybe it gives some ideas of what's required for Lacie RAID Manager (assuming LaCie has an Apple Silicon or Universal version): Obviously one problem is if you have a RAID array that uses software or a driver (vs a hardware RAID box) and you want something besides RAID-0 or RAID-1 (which are available via the built-in AppleRAID). I believe SoftRAID now works on Apple Silicon but I haven't tested that since I've moved away from SoftRAID due to previous problems. LaCie "How to change startup disk security settings on an Apple silicon Mac": "Kernel extensions in macOS": /guide/security/kernel-.ons-sec8e454101b/web Besides that there's a list of procedures required to enable an Apple Silicon or Universal kernel extension: A developer must at least build the kernel extension as a Universal app and must contain all ARM64 code necessary for that extension. Intel kernel extensions do not work on Apple Silicon, since Rosetta cannot translate those. Since 2017 Apple has been advising developers to move to the more reliable system extension architecture, and each successive version of MacOS since 2017 has further deprecated kernel extensions. LaCie apparently uses a MacOS kernel extension for their Lacie RAID Manager software. ![]() It also works OK on my M1 Max MacBook Pro 16. They are formatted HFS+ (MacOS Extended Journaled). It does about 1225 megabytes/sec write, 1336 megabytes/sec read. ![]() It is four 4TB SATA SSDs in RAID-0 using AppleRAID (not SoftRAID). I have a 16TB OWC Thunderbay 4 Mini connected via Thunderbolt 3 to my Mac Studio M1 Ultra. We're all conditioned to think that if the device can be physically connected it should work. I don't know if this all comes down to firmware (LaCie, Promise) RAID controllers versus software (OWC, SoftRAID) but trying to maintain older hardware compatibility with new Apple processors may be what's causing problems on some of these drives. Across the board, OWC hardware (Helios 3S, Thunderbay 4) has been solid on ARM processors except for my Mercury Pro LTO which had a controller card that was not compatible with ARM processors and had to be swapped out. I have had good experiences with my OWC Thunderbay Flex 8, which delivers around 600 MB/s and does not seem to have any issues with driver compatibilities on M1 Macs. I ran into a lot of compatibility issues with older Promise RAID drives due to the driver not being updated to work with ARM processors. It's not used for media, so that's acceptable for me. Is this a TB3 drive? I have a LaCie RAID (set to mirrored) that is TB2 and gets ~130 MB/s.
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