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From: lhmwzy <lhmwzy@gmail.com>
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Subject: system panic: RAID5 problem or zfs problem
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First we create a pool name www:
zpool create www da1 da2 da3 da4 da5 da6

Then replace da6 with a new disk.

when reboot the box,panic when booting:
ZFS:vdev failure,zpool=ww type=vdev.bad_label
painc:solaris assert:vdev_config_sync(rvd,txg)==0,file:/usr/src/sys/modules/zfs/../../cddl/contrib/oensolaris/utf/common/fs/zfs/spa.c,line:3014