I am planning to use zfs with fiber attached san disk from a emc symmetrix's Based on a note in the admin guide it appears that even though the symmetrixs will handle the hardware raid it is still advisable to create a zfs mirror on the host side to take full advantage of zfs's self healing/error checking and correcting.
is this true ? Additionally I am wondering how the zfs mirror will handle a backend disk failure on the Symmetrixs ? with vxvm disk failures are transparent and nothing needs to be done on the host side. Will this be the same with zfs ? or will zpool replace commands need to be run ? Thanks
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