My Synology NAS shows the following S.M.A.R.T. data for my Western Digital WD20EADS-00S2B0:
What is this
Raw data value equal to
402 means? The current
Worst value looks OK. Should I be worried about hard drive health?
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Could you run a test with WD Data Lifeguard Diagnostics and post a screenshot with the results? If you decide to go with an extended test backup your data first because if the software finds any errors, it will try to fix them automatically which can lead to a data loss.
You can download it from here: http://products.wdc.com/support/kb.ashx?id=mdiuuA
Let me know how it went. :)