Rsync seems unable to copy even the most simple ACL on AIX and throws the error "Unsupported attribute value (124)" $ /opt/freeware/bin/rsync -Aa /tmp/rtest/a/ /tmp/rtest/b/ rsync: change_sacl_perms: sys_acl_get_tag_type(): Unsupported attribute value (124) $ /opt/freeware/bin/rsync --version rsync version 3.0.7 protocol version 30 Copyright (C) 1996-2009 by Andrew Tridgell, Wayne Davison, and others. Web site: http://rsync.samba.org/ Capabilities: 64-bit files, 32-bit inums, 32-bit timestamps, 64-bit long ints, socketpairs, hardlinks, symlinks, no IPv6, batchfiles, inplace, append, ACLs, no xattrs, no iconv, no symtimes /tmp/rtest$ aclget ./a/file * * ACL_type AIXC * attributes: base permissions owner(ebambach): rw- group(staff): r-- others: r-- extended permissions enabled permit rwx u:myuser /tmp/rtest$ aclget ./b/file * * ACL_type AIXC * attributes: base permissions owner(ebambach): rw- group(staff): r-- others: r-- extended permissions disabled /tmp/rtest$ find . -ls 49166 1 drwxr-xr-x 4 ebambach staff 256 Nov 10 16:11 . 49167 1 drwxr-xr-x 2 ebambach staff 256 Nov 10 16:11 ./a 49169 0 -rw-r--r-- 1 ebambach staff 0 Nov 10 16:11 ./a/file 49168 1 drwxr-xr-x 2 ebambach staff 256 Nov 10 16:11 ./b 49170 0 -rw-r--r-- 1 ebambach staff 0 Nov 10 16:11 ./b/file