Every time I attempt to import a particular RAID-Z pool, my system hangs. Specifically, if I open up a gnome terminal and input '$ pfexec import zpool mypool', the process will never complete and I will return to the prompt. If I open up another terminal, I can input a 'zpool status" and see that the pool has been imported, but the directory has not been mounted. In other words, there is no /mypool in the tree. If I issue a 'zpool iostat 1' I can see that there are constant writes to the pool, but NO reads. If I halt the zpool import, and then do a 'zpool scrub', it will complete with no errors after about 12-17 hours (it's a 5TB pool). I have looked through this forum and found many examples where people can't import due to hardware failure and lack of redundancy, but none where they had a redundant setup, everything appears okay, and they STILL can't import. I can export the pool without any problems. I need to do this before rebooting, otherwise it hangs on reboot, probably while trying to import the pool. I've looked around for troubleshooting info, but the only thing that gives me any hint of what is wrong is a core dump after issuing a 'zdb -v mypool'. It fails with "Assertion failed: object_count == usedobjs (0x7 == 0x6), file ../zdb.c, line 1215. Any suggestions?
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