Now for the bad news. Without the volhist, if you don't know what volume(s) were used for DBBAckup your kind of screwed. The old DSMSERV DISPLAY DBBACKUPVOLUME command has been removed/deleted and IBM now says the following
DSMSERV DISPLAY DBBACKUPVOLUME - Information about volumes used for database backup is available from the volume history file. The volume history file is now required to restore the database.
You can find a list of TSM Server deleted commands, utilities, and options at the following link.