On Sun, Jan 26, 2014 at 11:40 AM, emigrant <emig...@gmail.com> wrote: > My Master machine is dead, exactly HDD(thank you God for CARP+pfsync) :). > > root@master[/etc]wd0(pciide0:0:0): timeout > type: ata > c_bcount: 16384 > c_skip: 0 ... > /: got error 5 while accessing filesystem > panic: softdep_deallocate_dependencies: unrecovered I/O error > Stopped at Debugger+0x4: popl %ebp > RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC! > DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION! > ddb>
This is a fundamental problem of softdeps:it can delay an operation to a point where other operations depend on it in a such a way that if the I/O for that first operation fails, the dependent operations cannot be undone and the failure propagated up safely. Rather than live a lie, it'll panic the system and die. I don't know exactly which operations can lead to that; if you need to know that you should go read the softdeps papers on Kirk McKusick's site. Philip Guenther
