It seems everything from PATA consumer disks to high-end server-class SCSI disks lie like crazy. Yes, that includes SATA there in the middle. I'll discuss fixing your storage components in a second.
What you should see is:
Total errors: 0.
But you probably won't. You'll probably see an error count and a histogram of errors per seconds-before-crash. Most RAID cards lie (especially LSI ones), some OSes lie (rare), and most disks lie (doesn't matter how expensive or cheap they are). They lie because their competitors do and they figure it's more important to look competitive because the magazines only print speed numbers, not reliability stats. They must figure people who care about their disks working know how to test/fix their disks.
brad's disk checker tool
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