There was an error on one of the disks in the software raid 5 under windows, how to replace it correctly???

Question

System administration

An error occurred (the disk began to crumble, i.e. a hardware problem and it really is a kirdyk) on one disk of a software RAID5 array. The status of the volume became "failed redundancy". To fix it, I added another disk of a suitable size to the system and did the "restore volume" command, but for some reason Windows removed from the array not a disk with errors, but a normally working one!
1) What to do with it????
2) How to correctly replace the disk?
3) Why did this crap happen?
4) Did anything survive from the disk data after that? Or is everything kirdyk and should we already forget about the data?
PS Windows 2008 R2 SP1 with all updates.

Answer 1

You can't save data. Rebuild RAID from scratch and restore backup. This is a natural price for the approach "there is simply nowhere to add all the data." Before rebuilding the array, it was necessary to at least disconnect the failed disk and connect a new one IN ITS PLACE.
I believe that when you add a new disk, the numbering of disks in Windows went wrong, and she picked up the disk that she thought was correct into the array.

Answer 2

first it was necessary to remove the broken disk,
and so Windows removed the first one that came across

Answer 3

it’s more correct IMHO to do a full backup of the data, stop the array, collect a new one, wait for the initialization to pass, fill back
the manipulations on the working array from the backup, there is a chance to lose it completely