My Pegasus2 R6 appears to hang after a few days of running on my iMac. It's been doing this for months without any obvious pattern. The R6 continues to appear in the Finder but doesn't respond and the Promise Utility never reports any issue. The R6 machine has a blue light power button but does not respond to a power cycle; the power code needs to be pulled. Both the Promise Utility and the R6's firmware are up-to-date.
Another disk drive on the Thunderbolt cable beyond the R6 continues to respond. The iMac complains about the improperly dismounted devices when the R6 is rebooted.
My latest subsystem report shows a number of improper shutdowns including today's.
Your help is appreciated!