On Sun, Mar 6, 2016 at 7:52 PM, Ram Ramesh <rramesh2400@xxxxxxxxx> wrote: > On 03/06/2016 06:29 PM, Phil Turmel wrote: >> >> On 03/05/2016 03:49 PM, Ram Ramesh wrote: >>> >>> I am curious if people actually replace hard drives periodically because >>> they are old or out of warranty. My 5 device raid6 has several older >>> drives (3/5 are 3+ years old and out of warranty) They seem fine with >>> SMART and raid scrubs. However, it makes me wonder when they will die. >>> What is the best policy in such situations? More importantly, do people >>> wait for disks to die and then replace or have some ad hoc schedule of >>> replacing (like every 6mo replace oldest) to keep things safe? >> >> I replace drives when their relocation count hits double digits. In my >> limited sample, that's typically after 40,000 hours. >> >> Phil > > > Thanks for the data point. 40K hours means roughly 4.5 years with 24/7. That > is very good. You use enterprise drives? They don't have to be, cheap crap can last. My case slots the drives in vertically with large silicone dampers, I feel like this helps. Model Family: Seagate Barracuda 7200.10 Device Model: ST3320620AS 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 9 Power_On_Hours 0x0032 040 040 000 Old_age Always - 52576 Model Family: Seagate Barracuda 7200.10 Device Model: ST3320620AS 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 9 Power_On_Hours 0x0032 048 048 000 Old_age Always - 46196 Model Family: Western Digital Caviar Black Device Model: WDC WD1001FALS-00E8B0 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 9 Power_On_Hours 0x0032 039 039 000 Old_age Always - 44551 Model Family: SAMSUNG SpinPoint F1 DT Device Model: SAMSUNG HD103UJ 5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 10 9 Power_On_Hours 0x0032 087 087 000 Old_age Always - 67735 Model Family: Western Digital Caviar Black Device Model: WDC WD1001FALS-00E8B0 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 9 Power_On_Hours 0x0032 040 040 000 Old_age Always - 44427 Model Family: SAMSUNG SpinPoint F1 DT Device Model: SAMSUNG HD103UJ 5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 6 9 Power_On_Hours 0x0032 093 093 000 Old_age Always - 36570 I would say the biggest thing is how often you get a reallocated sector. The Samsungs seem to get 1-3 a year, they will probably keep doing that until they die. Past experience with seagate tells me I'm going to get 10 in one day and the drive will die in a week. The WD will probably throw a few at a time and I'll dump them when they get to 10-15 sectors. -- 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
