QUOTE(gildan2020 @ Mar 4 2014, 05:17 PM)
hi,
does anyone know what's the failure rate of the wd 2tb and 4tb black?
WD2003FZEX
WD4003FZEX
are they good and reliable?
Before buying, check the manufacture date, the newer the better i think, any older than 2012 you can probably skip it, just in case you still have a choice

I have 2 2002FAEX (iirc), both also suffer from bad sectors, not much but i RMA-ed both anyway.
been running for one years until now, no problem whatsoever.
btw there is no good and reliable HDD, there is no sign to know when your hdd is gonna kaput. remember to backup regularly, never stores your important documents or pictures with precious moments on single hdd or storage, make multiple copies, store on online cloud storage service. if not you gonna regret million times later