Try -noprompt

Examples 
Command line: 
dsmc delete backup -noprompt c:\home\project\*

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Keith Arbogast
Sent: Thursday, October 14, 2010 10:00 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] fastest delete backup syntax

Is there a backup delete syntax that avoids the Y/N prompt after
examining all the files to be deleted? A customer has millions of files
to delete, and it can be hours before the Y/N prompt appears. He is
doing the deletes with this syntax, from the command line. Is there a
faster, better way? He needs to split up the delete process into several
smallish bites, not the whole elephant at once.

delete backup \\soenetapp1\groups\~snapshot\hourly.0\ic\* -deltype=ALL

With my thanks,
Keith