Replacing failed boot drive (mirrored)

[jmcguire525]

I have two Ultra Fit drives mirrored for my boot drive, one has "persistent errors" and needs to be replaced. Unfortunately I'm not on site and will need to walk someone else through the physical part of this. The Ultra Fit's have led indicators which should help identify the drive I remove from the mirror... can anyone here that uses these drives tell me the normal led status when the drive is active?

Also, in this image, is the chart displaying write errors?

 

[Chris Moore]

If both drives are the same age, they are probably both about dead. USB memory sticks don't last long as FreeNAS boot drives which is why we stopped suggesting that configuration about a year ago, maybe two years. The current recommendation is to use a small capacity SSD for the boot pool and mirror two of them if you want high reliability.