En fait, j'ai une info supplémentaire : le code erreur retourné est 207. Voici à quoi correspond ce code sur le site de WD :
207 SMART status failed before the media scan. Self Monitoring, Analysis, and Reporting Technology. This is a monitoring system, which stores all errors, retries, and power on hours. Computers with S.M.A.R.T. enabled help you monitor a drive's internal status through diagnostic commands. In order for S.M.A.R.T. to report if a drive has failed, it must be enabled as a system option. Drive should be replaced. Replace Drive
J'en déduis donc que j'ai plus qu'à le bazarder !!! 