Dell Vostro 330 (Early 2011) - Manual (Page 108)

Diagnostic Error Messages Description
CAUTION - Hard Drive SELF MONITORING
SYSTEM has reported that a parameter
has exceeded its normal operating range.
Dell recommends that you back up your
data regularly. A parameter out of range
may or may not indicate a potential hard
drive problem. S.M.A.R.T error, possible hard disk drive
failure.
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