Date: Thu, 19 May 2011 10:39:35 -0400 From: John D <jwd@SlowBlink.Com> To: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: LSI 9200-8e/gmultipath/ZFS cable pull kernel crash Message-ID: <20110519143935.GA83122@slowblink.com>
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Hi Folks, Looking for a bit of help to debug a sas interconnect, gmultipath, and zfs filesystem crash when the 2nd cable is pulled. Apologies for the cross post to geom & fs, hoped I would catch the right folks. In general, I have two systems each with an LSI 9200-8e sas hba installed. Each adapter has two cables going to shelf 1, then to shelf 2, then to the second system. System1 <---> Shelf1 <---> Shelf2 <---> System2 System1 <---> Shelf1 <---> Shelf2 <---> System2 Typical stuff, system1 & 2 are carp'd together, if one system goes down, the second zfs imports the pools and takes over. If I do a test pull of one of the cables, multipath removes the failed providers correctly with no interupt to the filesystem. Reinstalling the cable causes the providers to be re-integrated. This cable can be pull/reinstalled multiple times with no problem. However, pulling the 2nd causes a kernel crash. I have the configuration/logs/screen shots here: http://people.freebsd.org/~jwd/lsi_gmultipath_zfs.html I can replicate the problem on demand. Any help debugging this problem is appreciated. Thanks! john
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