-- Hi, When running classic upgrade, I get the same message Ignoring group memberships for all the users: Reading smb.conf Provisioning Exporting account policy Exporting groups Exporting users Ignoring group memberships of 'xxx' S-1-5-21-12345-67890yyy: Unable to enumerate group memberships, (-1073741596,This error indicates that the requested operation cannot be completed due to a catastrophic media failure or an on-disk data structure corruption.) I can also see that apparently no group get imported. While on the Samba3 server: # net sam list groups SambaUser and # net sam list users xxx and # net sam listmem SambaUser SAMBA\SambaUser has 2 members SAMBA\on SAMBA\xxx I have something not right with the groups, but I don't have a clue what to look at, as I never really needed the groups in Samba3. Where or what could I look at? Thanks in advance, Olivier