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Curious. Did you say what year iMac and your interconnect? I'm assuming TB2, but, you know. I've had TB cables go bonkers - might be worth getting another, blowing out the ports on the iMac and RAID, and do a little stress test.

I've re-tested the stability all the way back to my oldest iMac- a 2010 model running High Sierra.

Connection is USB-A (USB 3.1) Mac to USB-B on the box. The main cable has worked fine for years. However, in ruling out something just happening to go bad with cables, I've since tested TWO others (new).

Then I also started wondering about USB-A jacks on the Studio, so I ordered a new USB-C to USB-B cable to test the USB-C jacks on the Studio.

None of that makes any difference. I wondered if it was just a freak timing thing and maybe the box/drives are going bad, so I unhooked it and main cable and re-attached it to the old iMac. I left that connection on for a whole day- including through a sleep cycle. All fine.

Then I decided to try a newer MBpro with a newer version of Mac OS but not yet Big Sur/Monterey. Same thing- just fine.

So 2 Intel Macs linked by this one cable to this box are perfectly stable. Brand new Mac Studio linked with this cable (or 2 others... or a USB-C to USB-B cable) can't maintain a connection for more than a few hours.
 
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Are they spinners or SSDs? I've had horrific performance with spinning drives formatted APFS, so much so that I will only use APFS on SSDs.

A few days ago I had to clean huge backups with a lot of small files. Took several hours on APFS drives and only a few minutes on HFS.

The sad thing is, that Apple removed formatting drives as HFS from the disk utility with monterey.

BTW: Still no updates available here in Germany.
 
A few days ago I had to clean huge backups with a lot of small files. Took several hours on APFS drives and only a few minutes on HFS.

The sad thing is, that Apple removed formatting drives as HFS from the disk utility with monterey.

BTW: Still no updates available here in Germany.

Nope, it's still there:

Screen Shot 2022-03-31 at 3-31, 4.03.18 PM.png

Where are you looking exactly that you don't see HFS (Apple Extended) as an option?
 
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for everyone having trouble seeing the update- if you're running any version of Big Sur or Monterey previous to 12.3 softwareupdate in macos can go into a state where it stops checking for updates, even using the terminal command. it will stay in this state across reboots.
run this in terminal, then quit and re-check for updates using either system preferences or terminal:
sudo launchctl kickstart -k system/com.apple.softwareupdated

separate from all of that the update may have been pulled, I'm not seeing it on any of my macs.
 
I've re-tested the stability all the way back to my oldest iMac- a 2010 model running High Sierra.

Lots of detail here...

So 2 Intel Macs linked by this one cable to this box are perfectly stable. Brand new Mac Studio linked with this cable (or 2 others... or a USB-C to USB-B cable) can't maintain a connection for more than a few hours.
Nice thorough testing - love to see it!

I previously had one of their 4-bay FW800 hardware RAIDs that was rock solid (it is now retired). Without having a Studio of my own to test with, I got nothin' else. Happy hunting!
 
No update for my MacBook M1 Pro Max 16" and Mac Mini M1.

The update is available for all my IOS devices but not for Macs, strange.
 
Nice thorough testing - love to see it!

I previously had one of their 4-bay FW800 hardware RAIDs that was rock solid (it is now retired). Without having a Studio of my own to test with, I got nothin' else. Happy hunting!

I had that one too. Yes, solid.

In many searches to try to find anything else I could try, there were a few posts from people trying Thunderbolt 3/4 to 2 dongle with thunderbolt 2 to firewire 800 dongle and then connecting to old firewire drives with firewire cables to see if it helped. It apparently didn't. Else, I might have dusted off that oldie but goodie for a fresh new test.

Thanks for trying.

Anyone else got a consistently-connected RAID-0 box (at least 2 drives) to a Silicon Mac running Monterey that survives sleep cycles and isn't giving you seemingly-random, unexpected ejections? If so, what enclosure do you have? I need stable RAID-0 on this new Studio.
 
A few days ago I had to clean huge backups with a lot of small files. Took several hours on APFS drives and only a few minutes on HFS.

The sad thing is, that Apple removed formatting drives as HFS from the disk utility with monterey.

BTW: Still no updates available here in Germany.
Seems to still be available on my M1 Mini (12.3)... strange.
Screen Shot 2022-03-31 at 3.11.27 PM.png
 
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