Determine Drive Health | Which Disk is Closest to Failure?

[schoolpost]

Hello,

Is there a stat or measurement you can refer to in FreeNas that will tell you your drives health?

I'm swapping drives out of my RAID Z3 10 drive pool for larger ones and noticed my most recent resilver took much longer than usual.
( ~ 50MB/s I usually see about double during my resilvers )

My initial thought is that maybe an existing drive in the pool is lagging behind and it might be due to imminent failure.
So I want to swap out the drive with the least health in the pool as I'm migrating to larger disks.

What is the best way to determine a drive's health in FreeNas and how does one go about it?

Thanks

 

[Johnnie Black]

SMART report for all drives would be the place to start:
smartctl -x /dev/daX (or adaX)

 

[Kevin Horton]

I'm swapping drives out of my RAID Z3 10 drive pool for larger ones and noticed my most recent resilver took much longer than usual.
( ~ 50MB/s I usually see about double during my resilvers )

I had two scrubs that took much longer than usual with FN 11.1. In both cases the investigation after the scrub completed found that there was a runaway afp process using a significant proportion of the CPU.