Hello there,
iSCSI uses port 3260, can you connect to that port from the server to the target?
Can you ping the target IP addresses?
On your computer, there may be a loose port/cable or faulty hard disk, leading to the event ID 157 disk has been surprisingly removed. You can go physically check the connection of the hard drive.
Similar discussion here
Hope this resolves your Query !!
--If the reply is helpful, please Upvote and Accept it as an answer–