So, what are the correct options?
I did try reading the man pages for mount, and those related to reiserfs*.
Thanks!

Maybe reiser4 instead of reiserfs?

https://en.wikipedia.org/wiki/Reiser4

I fail to understand how that helps. It's just an article on an older FS which also lists no arguments for the errors option. I also tried the man pages from reiser4 without success.

Your initial post gives an error but not much other detail.

I've never worked with ReiserFS or Reiser4. I recently learned from another link that Reiser4 is a successor to ReiserFS. Your post mentioned reiserfs so I thought it possible looking into Reiser4 would be the way for you to go. Had anyone else responded to your post I wouldn't have done so after 2 days.

One link is seldom the end of research you need to do. You might look at the Reiser4 links within the Wiki.

You might also explain why you feel you need Reiser rather than one of the other fully supported filesystems such as ext4 or xfs available on most modern distros.