Just made my order, thank you for this! On my way to scoring +10000 relationship points!
There where some errors in the name form. Names that where changed, couldn't be changed again (I'm using Firefox) & In the last form of Pride & Prejudice, The change I made on the last name weren't reflected in the text.
I worked at a small local computer shop in Belgium. We ran a local NFS/SMB server storing all sorts of different ISO's & applications for archiving. All this was ran on a md-raid 10.
At one point I got a notification that one of the 4 disks is failing. Trying to determine the disk that was failing using dd if=/dev/sda of=/dev/null for each disk & looking at the "activity" light on the chassis of disks. Spotted an active led of a disk & executed the mdadm command for removing that disk.
replaced the disk with a brand new one & started syncing mdadm.
Turns out I should had disabled networking, because someone was accessing the datastore & I removed the wrong drive. Lost all of it & 14 hours of my life, trying to recover it with testdisk.
[1] https://activitywatch.net/