On Jan 20, 2009 12:30 +0800, Coly Li wrote: > Ext[234] is sophisticated to have on-disk uuid record. Most file systems > in the patches (except jfs and reiser3) do not have a persistent uuid, > a reasonable/feasible solution without media format modification is fsid > in boot/mount life cycle. That's why huge_encode_dev(sb->s_bdev->bd_dev) > is used here. For jfs and reiserfs3, is there any use case for > persistent fsid cross boots ? I would say yes, this is worthwhile to do, or the fsid can change between boots unnecessarily. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html