I have a raid5 array that contain 4 disk and 1 spare disk. now i saw one
disk have sign of going fail via smart log.
Better safe than sorry... replace the failing disk and resync, that's all.
You might want to do "cat /dev/md# > /dev/null", or "cat /dev/hd?
/dev/null" first. This is to be sure there isn't some yet-unseen bad
sector on some other drive which would screw your resync.
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