Hi, After managing to upgrade to svn90 after a few failed attempts, I was left with a ton of zfs datasets (see previous post) most of which I''ve managed to destroy, however there''s something that stumps me NAME USED AVAIL REFER MOUNTPOINT rpool 9.85G 24.6G 62K /rpool rpool/ROOT 7.74G 24.6G 18K /rpool/ROOT rpool/ROOT/opensolaris 55.7M 24.6G 2.95G legacy rpool/ROOT/opensolaris-10 7.68G 24.6G 4.44G legacy rpool/ROOT/opensolaris-10 at static:-:2008-06-01-08:08:11 1.47G - 2.95G - rpool/ROOT/opensolaris-10/opt 1.78G 24.6G 1.78G /opt rpool/ROOT/opensolaris-10/opt at static:-:2008-06-01-08:08:11 138K - 622M - rpool/ROOT/opensolaris/opt 0 24.6G 622M /opt rpool/export 2.10G 24.6G 21K /export rpool/export/home 2.10G 24.6G 2.10G /export/home -bash-3.2# zfs destroy rpool/ROOT/opensolaris-10 at static:-:2008-06-01-08:08:11 cannot destroy ''rpool/ROOT/opensolaris-10 at static:-:2008-06-01-08:08:11'': snapshot has dependent clones use ''-R'' to destroy the following datasets: rpool/ROOT/opensolaris/opt rpool/ROOT/opensolaris and -bash-3.2# zfs destroy rpool/ROOT/opensolaris-10/opt at static:-:2008-06-01-08:08:11 cannot destroy ''rpool/ROOT/opensolaris-10/opt at static:-:2008-06-01-08:08:11'': snapshot has dependent clones use ''-R'' to destroy the following datasets: rpool/ROOT/opensolaris/opt opensolaris-10 is the dataset I am currently operating under (or so I presume!), is it safe to destroy the other one (and update grub accordingly) ? Thank you, Yiannis. This message posted from opensolaris.org