[Bug 178473] gmultipath(8) needs to be smarter about errors

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Tue Aug 23 09:30:06 UTC 2016


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=178473

--- Comment #1 from Jan Bramkamp <crest at bultmann.eu> ---
ZFS won't see the I/O request fail because geom_multipath retries all paths
into eternity instead of reporting failure. This might trigger the ZFS deadman
timer an panic() the system if enough geom_multipath providers are affected.
The worst part is that rebooting a system with a defective disk behind
geom_multipath hangs during (re-)boot and won't even reach single user mode
until geom_multipath is unloaded or the defective device is removed.

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