After installing the DEXT driver and Promise Utility, my Pegasus 2 R6 works well. But once the computer goes to sleep with the RAID mounted and then tries to wake up, it crashes the Mac, forcing a restart. It has done this numerous times in the past two weeks. It doesn't seem to do this when the RAID is not attached.
It is a new Mac Studio M4 Max running Sequoia 15.4
Any advice to resolve this?
Thanks,
-Jim
Hi Jim,
With the Pegasus1 and Pegasus2 it's important to update to the latest firmware when used with an Apple Silicon Mac.
We have a Knowledge Base article for this.
Hi,
Thanks for the quick follow up. I forgot to mention that my firmware was already updated to the latest (v5.04.0000.64), and this problem still exists.
Any other suggestions?
Hi,
Any other ideas on this problem? I'm still getting the crashes on waking from sleep.
It doesn't happen when I turn on "Prevent automatic sleeping when the display is off" in the Mac preferences. But I'd rather not leave that on all the time.
Thanks for any advice or suggestions.
Hi,
If updating the firmware and using the latest driver does not help, there's nothing more that can be done in that regard. Jim has posted the only known solution, prevent the Mac from sleeping. I posted this long ago but it was not well accepted so I did not post it here.
That being said, this is rare and I don't know what's causing it. We don't see this issue in the lab or elsewhere. My best guess is that some application that's connecting to the Pegasus tries accessing it before it's had time to boot and some part of macOS runs out of buffer space causing a panic.When booting after a panic macOS will give you the opportinity to send a stack trace to Apple, please do so, this has lead to problems being fixed for things that I have reported.
Hi,
Just chiming in to report that I'm encountering the same issue with a similar setup, as another data point:
Mac Studio with an M2 Ultra and 128 GB RAM, running on Sequoia 15.1.1 with a Pegasus3 R8. Current DEXT driver installed and firmware is up to date.
HI RP,
Thanks for your response. I tried quitting all apps with the Pegasus attached and the OS still crashed on waking from sleep. So unless there is an app running in the background, it must be something else (perhaps an OS or driver issue)?
As you suggested, I've been reporting the crashes to Apple. Hopefully they'll find a fix.
Hi,
If updating the firmware and using the latest driver does not help, there's nothing more that can be done in that regard. Jim has posted the only known solution, prevent the Mac from sleeping. I posted this long ago but it was not well accepted so I did not post it here.
That being said, this is rare and I don't know what's causing it. We don't see this issue in the lab or elsewhere. My best guess is that some application that's connecting to the Pegasus tries accessing it before it's had time to boot and some part of macOS runs out of buffer space causing a panic.When booting after a panic macOS will give you the opportinity to send a stack trace to Apple, please do so, this has lead to problems being fixed for things that I have reported.
Hi Jim,
One app that tends to keep running in external storage is spotlight, many complain they can't eject the Pegasus and it turns out that spotlight is constantly indexing the drive.
Maybe if you configure spotlight to not index the Pegasus that will help.
Hi R P,
Thanks for your suggestion. I checked and I had already disabled Spotlight indexing on the Pegasus. So that doesn't seem to be the source of my problem.
