The Frailties of mdadm RAID and Why I Wont Ever Use It Again
PSA!!!
As a homelabber I have used several filesystems across many machines. When I first began the simplest was EXT3 and its predecessor EXT4 is still the simplest journaling file system around. After a while I started to look for redundancy via mdadm’s RAID on Linux. From then on I had RAID arrays usually consisting of RAID1 or mirror on most of my systems whether it be on HDDs or SSDs. But only after 10 plus years have I had a reason to take an old unused RAID1 HDD and try to get a file out of the drive, I have found it to be virtually impossible.