Hello, I''ve problems concerning mounting the lustre filesystems (mgs/mdt/ost). the filesystem is formated correctly and the needed kernel modules are installed and loaded. (used kernel 2.6.18 ) This is the error: debian:/mnt/test# mount -t lustre /dev/hda5 /mnt/test/ost0/ mount.lustre: mount /dev/hda5 at /mnt/test/ost0 failed: Unknown error 256 This is the dmesg output: kjournald starting. Commit interval 5 seconds LDISKFS FS on hda5, internal journal LDISKFS-fs: mounted filesystem with ordered data mode. kjournald starting. Commit interval 5 seconds LDISKFS FS on hda5, internal journal LDISKFS-fs: mounted filesystem with ordered data mode. fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_force_commit fsfilt_ldiskfs: Unknown symbol ldiskfs_force_commit fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_ext_search_right fsfilt_ldiskfs: Unknown symbol ldiskfs_ext_search_right fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_mark_inode_dirty fsfilt_ldiskfs: Unknown symbol ldiskfs_mark_inode_dirty fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_xattr_get fsfilt_ldiskfs: Unknown symbol ldiskfs_xattr_get fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_journal_abort_handle fsfilt_ldiskfs: Unknown symbol ldiskfs_journal_abort_handle fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_ext_calc_credits_for_insert fsfilt_ldiskfs: Unknown symbol ldiskfs_ext_calc_credits_for_insert fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_xattr_set_handle fsfilt_ldiskfs: Unknown symbol ldiskfs_xattr_set_handle fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_ext_insert_extent fsfilt_ldiskfs: Unknown symbol ldiskfs_ext_insert_extent fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_mb_new_blocks fsfilt_ldiskfs: Unknown symbol ldiskfs_mb_new_blocks fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_ext_search_left fsfilt_ldiskfs: Unknown symbol ldiskfs_ext_search_left fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_bread fsfilt_ldiskfs: Unknown symbol ldiskfs_bread fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_ext_walk_space fsfilt_ldiskfs: Unknown symbol ldiskfs_ext_walk_space fsfilt_ldiskfs: disagrees about version of symbol ldiskfs_map_inode_page fsfilt_ldiskfs: Unknown symbol ldiskfs_map_inode_page This test was made not with the vanilla kernel, but with the debian kernel. For this test I used the things which are in the alioth svn: http://svn.debian.org/wsvn/pkg-lustre/ (So I''m not sure if this is a error introduced by us, or not) I''ll try to reproduce this bug on Monday with a vanilla kernel Is someone familiar with this error? Greetings Patrick Winnertz