On Sun, Mar 03, 2024 at 12:14:14PM -0000, beecdadd...@danwin1210.de wrote: > On Sun, March 3, 2024 12:07 pm, Otto Moerbeek wrote: > > On Sun, Mar 03, 2024 at 12:01:12PM -0000, beecdadd...@danwin1210.de > > wrote: > > > > > >> oh okay reserved for root? I ran those commands as root, or you mean > >> something else? I didn't know overhead was that big.. so this is okay, > >> then? thanks for very fast reply > > > > 3.5G meta data overhead is less than 1.5% of your partition. Not that > > high, I'd say. > > 235-223 is 8G, not 3.5G?
Your 238.5 partition maps to a filesystem of size 235G, of which 5% is reserved (but usable by root). > > > Only root processes can write crossing the reserved space limit. The > > disk will than show a Capacity number larger than 100%. > > so root process, not root user? ok Any proces has a uid as well. > > > Non-root proceses will see failed writes. > > > > > > You can change that 5% by using tunefs, or when doing newfs from the > > start). > > > > -Otto > > newfs from the start? I did newfs from the start? > https://www.openbsd.org/faq/faq14.html#softraidcrypto > is this not what you mean by newfs from the start? When doing newfs, you can specify a non-default reserved space by supplying a -m parameter. For example, newfs -m 0 ... will not reserve any space for root, and the FS Size will be equal to Available (if the FS is empty). The reserved space can *also* be changed after FS creatiomn, using tunefs(8). -Otto > > > > >> > >> On Sun, March 3, 2024 11:57 am, Otto Moerbeek wrote: > >> > >>> On Sun, Mar 03, 2024 at 11:48:01AM -0000, beecdadd...@danwin1210.de > >>> wrote: > >>> > >>> > >>> > >>>> > >>>> disklabel -h sd3 shows this > >>>> > >>>> # /dev/rsd3c: > >>>> type: SCSI > >>>> disk: SCSI disk > >>>> label: SR CRYPTO > >>>> duid: some-number > >>>> flags: > >>>> bytes/sector: 512 > >>>> sectors/track: 63 > >>>> tracks/cylinder: 255 > >>>> sectors/cylinder: 16065 > >>>> cylinders: 31130 > >>>> total sectors: 500117600 # total bytes: 238.5G boundstart: 64 > >>>> boundend: 500117600 > >>>> > >>>> > >>>> > >>>> 16 partitions: > >>>> # size offset fstype [fsize bsize cpg] > >>>> c: 238.5G 0 unused > >>>> i: 238.5G 64 4.2BSD 4096 32768 26062 # > >>>> /mnt/extssd > >>>> > >>>> > >>>> > >>>> but df -h shows that sd3i is of size 235G but only 223G is > >>>> available, and the Used space is 4.0k.. SSD is new and I followed > >>>> > >>> > >>> A fileystem has meta data overhead. That space is not avalailable for > >>> user files. Also, by default 5% of available space is reserved for > >>> root only. That fraction is represented in available space. See > >>> newfs(8). > >>> > >>> -Otto > >>> > >>> > >>> > >> > >> > > > >
