Time to replace?

[Segfault]

I have this media server, running RAIDZ for all sort of data storage. And one lonely WD black for OS. I do not recall ever replacing this OS drive, it shows 83180 hours of power on. My last routine check revealed it now has 92 reallocated sectors. Brrr ... preparing new drive right now. Hats off, WD. 83+ thousand of hours is some achievement, nine and half years. Wondering how long it would run if I left it in ...

 

[Segfault]

I have user home directories on NFS, so I couldn't replace the drive when users were active. Woke up early this morning and replaced it.
Here is proof hard drives work well and last long if kept always spinning. 590 spindowns during 83203 hours of service.

1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0
  3 Spin_Up_Time            0x0027   158   155   021    Pre-fail  Always       -       5075
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       590
  5 Reallocated_Sector_Ct   0x0033   188   188   140    Pre-fail  Always       -       92
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   001   001   000    Old_age   Always       -       83203
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age   Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age   Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       588
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       274
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       590
194 Temperature_Celsius     0x0022   122   092   000    Old_age   Always       -       25
196 Reallocated_Event_Count 0x0032   197   197   000    Old_age   Always       -       3
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age   Offline      -       0

 

[SmokeRngs]

Here's a WD 640GB drive from before they did the color coding. This model ended up being the first Blue drive, though.
Also a Hitachi 1TB I've had running quite a while.
Amazingly I have a Seagate 320GB drive which isn't currently hooked up but has even longer power on time. I think I got the single unicorn Seagate drive in existence.