logical restore failed -- ISAM error: no free disk space

Hi, I'm trying to restore using ontape a few dbspaces from a level 0 archive and logical log files. After nearly reaching the end of the logical log restore ontape asks if I want to suspend, commit or abort the logical restore. I type "n" for commit, and I get the error "logical restore failed - ISAM error: no free disk space." I don't understand where free disk space is needed and how much? I have 32 logical logs, each 150MB. Currently all of the logical logs except 1 have status "UB". In the logical log restore approximately 27 of the 32 logs are restored from tape. I am using Informix Dynamic Server 9.3 on a Sun E3000. Thanks for any help, Steve