On Jul 29, 2012, at 6:11 PM, Andreas Dilger wrote:

quoted

~ # tune2fs -l /dev/vg0/lvol1
tune2fs 1.42.4 (12-June-2012)
Filesystem volume name:   <none>
Last mounted on:          /home/filestore_extern_1
Filesystem UUID:          8fba4f1b-5311-4c9b-b8bf-def4957dc1bd
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery extent 64bit flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize

Was the filesystem formatted with the 64bit option, or was this enabled after formatting time?  This puts my earlier comment in doubt. 

Can it even be changed after format time? I tried to do that to save a backup/restore cycle, but tune2fs would not let me?

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