+1. Years ago I had a Raid1 mirror that failed because the controller itself went bonkers, and both drives were accumulating errors. Luckily I was using mdraid and could recover their files by using testdisk [0] on both of them separately as USB drives on a different Linux machine. Was a really really long process; I pray the storage divinities not to have to live those couple days again.

[0] https://www.cgsecurity.org/wiki/TestDisk