Hardware RAID1: What are the consequences of partitioning an array?

Question

Iron

Good day to all!
I would like to shed some light on a hypothetical situation.
Bottom line: On a server with a hardware raid controller, for example on LSI, RAID1 is assembled from 2x SATA disks. After removing one of the disks (both are good), the array continues to function for some time on the remaining disk.
If the seized disk is put on another server with similar hardware and controller, then:
1) Will it be possible to raise the R1 array there on this one disk, for backup or additional installation of another, blank disk, subsequent rebuild and transfer of the array to new hardware.
2) If you change the data on both "R1 half-arrays" (one original disk from the original R1 composition on each server) on different servers, then return one of the disks to the second server - will the array be assembled? What will be the resulting data on this array?

Answer 1

1) it will work with the same controller
2) it will not be assembled, one of the disks will be the main one and the system will work on it, the second disk will be marked as degraded

Answer 2

1:
- it will work with a similar controller (for example, a controller from the same manufacturer will most likely accept it). In particular, Intel controllers, even lower models, accept arrays created under the controller of the older model. If only this RAID level was supported.
- Most likely it will work with any controller that can create RAID1 by copying data from one disk to another.
2: If, after disconnecting the disks, at least one of them worked separately, then the removed disk will not be accepted back. It will be accepted as a "new" disk.
If you insert only the "walked" second disk without the first one and turn on the array, then it will be accepted as the main one, possibly with some incidental questions, but then when you insert the first disk back, it will already be considered "new".
There is no way to mix data.