2013 Mac Pro + Promise Pegasus 2 R6 RAID. Since, and only since, updating to Big Sur I'm unable to put my computer to sleep without the hard drives being ejected incorrectly (according to the system error message). This causes all kinds of workflow issues. For example, in Adobe Premiere Pro it prevents the most recent projects list from populating, since the hard drive where the project files reside was disconnected. If I leave the edit program open when the computer goes to sleep all of the footage goes offline when I come back. Lord knows what it's doing to the hard drives by force ejecting them. This was never a problem on any OS version before. There are dozens and dozens of threads about this all over the internet dating back years now. FIX THIS, APPLE!!!