Hi, Rainer -
Unfortunately, implicit restorals (where you do not explicitly name objects to be restored) has become a difficult challenge in the product, and remains a muddled area which sorely needs to finally be straightened out by Development, as the product should figure out the best approach: the mess should not be left to the befuddled, exasperated customer.
In some cases, suppression of the more modern No Query Restore, by explicit suppression or involvement of qualifying restoral options, can improve restoral time, as Classic/Standard protocols are in play and a files list is promptly sent to the client and it can make its choice. This is what prompted you to add DISABLENQR to your option file. More often, you want No Query Restore to be in effect, though, such that the server generates the list of files to send to the client. However, the client's memory and processing power may be overwhelmed by the volume of files information (not to mention the time to send it over the network). With NQR in effect, customers get concerned as they see nothing coming back from the server for some time and wonder what's going on.
Whereas you suppressed NQR, you are seeing the client examining the inventory list, and the client is probably slowing as its virtual storage is taxed and paging increases. In your wholesale restoral, NQR may be the better choice, as the server may have better resources to generate the list. Then again, it may take as long.
I wish there were a better answer: none of us wants to have to deal with such quandries.
Richard Sims