The documentation (7002221)"How to set up a restore area" suggests
folder names with max 8 chracters:

Click Create to set up a new restore area. (The restore path cannot have
a folder with more than 8 characters in it.) You need to use a 8.3
standard for directory naming.

My question to be sure : does the restriction really target only to the
folder name or to the full path incl. the server name and volume name ?
In clustered systems short server names are hardly to realize.