>>>>> "Ram" == Ram Ramesh <rramesh2400@xxxxxxxxx> writes: Ram> On 03/06/2016 11:18 PM, Phil Turmel wrote: >> On 03/06/2016 07:52 PM, Ram Ramesh 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? Mine are desktop (and may >>> be one HGST NAS) >> I moved from desktop drives to NAS drives about 4 years ago. So the >> 40k+ hours were on desktop drives. (A couple started dying in the mid >> 30,000's, but I suspect I overheated those two.) The oldest NAS drives >> I have now are approaching 40k, and are all still @ zero relocations. >> WD Reds, fwiw. >> >>> My SMART is perfect except for power on hours. I am going to take it >>> easy for now as I have a spare (not part of a RAID) just in case >>> something bad happens. >> Yes, sounds reasonable. >> >> Phil >> Ram> My disks have about 10K hours (my server only runs from Ram> 4pm-2am). I think I have quite a bit of life left assuming an Ram> on/off cycle is not as bad as extra 14 hours of run time. The on/off is much worse than just sitting and spinning. That's what tends to kill drives in my experience. Drives die no matter what, but laptops and other systems which power off/on tend to die much more quickly. John -- 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
