On 28.10.2012 16:15, Rainer Fügenstein wrote: > > when trying to upgrade my raid5 with 4 Western digital caviar green > 3TB drives [WDC WD30EZRX-00MMMB0] (3 brandnew, 1 about 4months old), > the "old" drive and one of the brand new ones failed with > unrecoverable read errors and about 70 reallocated sectors each. the > failures already occured during the initial resync after creating the > raid. > > until now I was very fond of WD caviar green drives, but after this > 50% failure rate I'm not very eager to restore data from the backup. > > what is your experience with 3TB drives, WD and others? This is not about 3TB, but about older 2Tb WD EARS. I've 3 of them in a raid array which runs 24x7 for about 2 years. Here's one of them: Model Family: Western Digital Caviar Green (Adv. Format) Device Model: WDC WD20EARS-00MVWB0 Firmware Version: 50.0AB50 ... 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 83 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 9 Power_On_Hours 0x0032 077 077 000 Old_age Always - 16994 194 Temperature_Celsius 0x0022 107 099 000 Old_age Always - 43 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline - 0 Other 2 are very similar. I've several more drives of the same family in other systems, about 10 in total, some are older than these. Had no single failure so far. SMART selftests are run on a regular basis (about once every 2 months). I can only guess this depends purely on luck. I've seen reports about these drives failing often, yet others (like me) report these are rock solid. Go figure. /mjt -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
