when ufs is 99% full, current seems to limit creat to 28672 bytes

[Julian H. Stacey]

Gary J wrote:

> I suspect this ia a result of how UFS is designed.

Yes.

> Did you use the
> standard options for block and fragment size?  How about inodes?

Yes, I created that partition years ago, I pretty much always just
use newfs unless experimenting perhaps for a small partition on USB
stick or CDROM (& then I'd normally delete), so it would have been
a newfs almost guaranteed with no parameters, default.

> Is the file system UFS1 or UFS2?

UFS2


> UFS is a very compex bit of software and I imagine there are all
> kinds of interesting surprises when the file system is 99% full.
> 
> Anyway, the newfs man page may provide some clues.  Or look at
> Wikipedia, there's a UFS entry there, but it doesn't go into the gorey
> details.

I'll read https://en.wikipedia.org/wiki/Unix_File_System


Konstantin B wrote
> dumpfs(8) allows to look at ....

Top of dumpfs:
  magic   19540119 (UFS2) time    Sun Dec 25 03:19:13 2016
  superblock location     65536   id      [ 548daf7f b34ae147 ]
  ncg     1399    size    224197115       blocks  217157317
  bsize   32768   shift   15      mask    0xffff8000
  fsize   4096    shift   12      mask    0xfffff000
  frag    8       shift   3       fsbtodb 3
  minfree 0%      optim   space   symlinklen 120
  maxbsize 32768  maxbpg  4096    maxcontig 4     contigsumsize 4
  nbfree  0       ndir    1555427 nifree  102683126       nffree  1339169
  bpg     20035   fpg     160280  ipg     80256   unrefs  0
  nindir  4096    inopb   128     maxfilesize     2252349704110079
  sbsize  4096    cgsize  32768   csaddr  5056    cssize  24576
  sblkno  24      cblkno  32      iblkno  40      dblkno  5056
  cgrotor 622     fmod    0       ronly   0       clean   1
  metaspace 6408  avgfpdir 64     avgfilesize 16384
  flags   soft-updates 
  fsmnt   /data
  volname         swuid   0       providersize    224197115

Thanks All,

Cheers,
Julian
-- 
Julian Stacey, BSD Linux Unix Sys Eng Consultant Munich
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