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I have a late 2015 27" iMac 5K retina with 10.11.15, and two OWC Thunderbay 4 boxes, both with mirrored RAID 1. I am having a problem where the volumes unmount 30 times a day. Apparently this is a fairly regular occurance with SoftRaid and OWC Thunderbay 4. The issue is that OWC on the phone says not my problem, and SoftRaid says buy a new computer. Really helpful. Thanks.
I do have the box unchecked for drives asleep, as recommended. As a full time photo/video pro, having volumes unmount while trying to run FCPX, or burn disks, (or do anything) is NOT COOL. If I pay 149$ for the full version, is this going to do anything?
Not happy
Posted : 06/10/2016 10:33 am
No this is not likely the Thunderbay enclosure causing this. This is not a "regular occurrence" with SoftRAID. It is relatively rare, but does affect a lot of computers. While this problem can be caused by devices, such as Thunderbay's, LaCie Big5, etc, or even Thunderbolt docks, the primary trigger is the Mac itself.
If you are getting this constantly after disabling sleep, then this is extremely rare.
Our belief is that this is a hardware issue, primarily caused by a flaw in either Apple computers themselves, or possibly a OS interaction with some computers. We have this in Apple's labs to try to resolve, but the best (current) solution is disable sleep. If it still happens when sleep is disabled, the solution is new hardware, unfortunately.
You can test this is not a SoftRAID issue by putting your disks into Apple Disk utiltiy format, open a text edit file, then seeing if you get an error on the files in the same time frame. I suspect you will.
If you look in your system log, you see a PCI bus resets as this example:
Oct 6 10:24:57 Brians-iMac kernel[0]: [ PCI configuration begin ]
Oct 6 10:24:57 Brians-iMac kernel[0]: [ PCI configuration end, bridges 12, devices 24 ]
Oct 6 10:25:03 Brians-iMac kernel[0]: [ PCI configuration begin ]
Oct 6 10:25:03 Brians-iMac kernel[0]: [ PCI configuration end, bridges 26, devices 24 ]
SoftRAID is not involved with this. You cannot "upgrade" to get rid of this problem.
Is this Mac covered under Apple Care?
Have you tried the following:
reset all cables
Clean all TB ports with swabs and Isopropyl alcohol
Ensure all cell phones are away from the computer/cables/drives
Do you have another Mac you can test with? It is useful to see if changing computers makes this go away. Then you have an argument to Apple to replace your computer.
Let us know.
Posted : 06/10/2016 10:42 am
