onload question

Informix users, I have a dilemma. Let's say I have a 5 gig database spread over five 1 gig dbspaces (db1-db5). I run an onunload (ver 7.31.UD7). I take that onunload file and bring it to a different server where the dbspace layout is identical to the original server (5 dbspaces of 1 gig each). I do an onload and specify a dbspace, but none of my dbspaces are 5 gigs large to accomodate the onload. How should I get around this without specifying a different dbspace for each and every table (have lots of tables)? I can swear an older version of Informix (7.30.uc5) wanted you to have identical dbspace layouts on the onload portion. In other words, if you had your db spread over 5 dbspaces at onunload time, you needed 5 dbspaces named the same upon onload time. This version of Informix tries to put the whole database in the dbspace you specify at onload time (onload -t <device> -d <dbspace> database). Please copy phillip.tien@wholefoods.com in your responses. Thank you. -Phillip