Am 29.06.2017 um 11:52 schrieb Gandalf Corvotempesta:
Linux kernels detect something bad only by accessing to the failed sector. If that sector is not used, kernel knows nothing. HW RAID like LSI are able to read the whole disks, block by block, even the unused part, detecting failures before something is trying to write to that sector If you have a bad sector on an unused part of the array, when you have to rebuild due to another disk failure, you'll hit a URE and the whole array is failed
there is nothing like "unused part of the array" since the linux-raid-layer knows nothing about the filesystem on top and hence a raid-check (scrub) reads every block as said hardware controller
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