RAID 5 with mdadm "spare" and "active sync" confusion
I am testing my RAID5 setup, and get confused on
"spare" and "active sync"
For md0, every drive has status "active sync", but md1 has one drive as "spare". I use the same mdadm cmd to build these 2 RAIDs, but not sure why it difference. My question is whether all 4 drives are used in the RAID array, or it indicates that one drive is failed. Any help would be great.
Here the output from
# mdadm --verbose --examine --scan
for md0 and md1 respectively
well mdadm is clever enough.
you only see one spare, which is SHARED between the 2 arrays (someone correct me if you think this is wrong)..
so it will not render 2/10 drives spare and waste your money :)
meanwhile you do seem to have a faulty drive there ..
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