Christian Kujau wrote: > Hi, > > I suspect this being a FAQ already, but I could not find[0] it: > does ext4 really use 5% of available space for internal housekeeping? > After formatting and mounting a ~917GB partition I see: > > # df -h /mnt/bench/ > Filesystem Size Used Avail Use% Mounted on > /dev/sdb1 917G 200M 871G 1% /mnt/bench > > The "200 MB used" would seem more sensible, but the difference between > "available" and "size" is really 46 GB. How comes? > > Thanks, > Christian. > > [0] http://ext4.wiki.kernel.org/index.php/Frequently_Asked_Questions > > PS, a few more details how the filesystem got created and mounted: > > # /opt/e2fsprogs/sbin/mkfs.ext4 -V > mke2fs 1.41.0 (10-Jul-2008) > Using EXT2FS Library version 1.41.0 > > # /opt/e2fsprogs/sbin/mkfs.ext4 /dev/sdb1 > [...] Somewhere in [...] was: XXX blocks (5.00%) reserved for the super user this can be tuned and maybe should actually be on a sliding scale for larger filesystems. -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
