I would suppose it would depend upon the functionality of the drives which were replaced. Were they beginning to fail, or less reliable, or were they already beyond usable? It may be possible but its not something I would guarantee.
If it were me, I would be wondering about the other hardware involved. Why did two drives fail and why did their replacements also fail. This assumes that the new drives were brand new pristine drives because if they were it seems very suspicious that both drives would suddenly fail like this.
The original two drives were detected by the BIOS and were operational. I had checksum warnings so I replaced them one at a time. The drives were new from a local computer chain store.
It's weird, it took me a week to resilver ada0 and 2 days and 12 hours for ada1. The Pool was healthy for 3 hrs when I noticed my email server wasn't sending mail. I checked the GUI the two drives were gone. I shutdown Freenas-GUI and when I booted into the BIOS It was confirmed, no disks (new ones were detected.
I took the failed new drives out and placed them on a test rig. I noticed they spin up then spin down. It's like they're searching then stop.
I agree it's strange that both went/are not detected. I thought it was the SATA controller, Power or Firmware.
Is there a way to edit/change what the Disk Set thinks are it's set of disks?
Thank you for your input.