David Laight wrote:-

> On Sun, Apr 11, 2004 at 10:50:41AM +0100, Neil Booth wrote:
> > For one of my filesystems, df -i gives:
> > 
> > Filesystem    Size     Used     Avail Capacity  iused    ifree  %iused
> > Mounted on  
> > /dev/wd1a      36G      33M       36G     0%     -514  9439744 45501%
> > /backup
> > 
> > How can this be negative?  The filesystem mounts cleanly. 
> 
> Does the filesystem have a blocksize of 64k ?
> The FFSv2 support caused the kernel (and fsck) to get very confused
> between the superblock and first alternate.
 
8K by the looks of it:

bash-2.05b$ sudo dumpfs -s /dev/wd1a
file system: /dev/wd1a
endian  little-endian
magic   11954 (UFS1)    time    Wed Apr 14 06:55:56 2004
superblock location     8192    id      [ 401c2b0c 226f6487 ]
cylgrp  dynamic inodes  4.4BSD  sblock  FFSv2   fslevel 4
nbfree  4733239 ndir    3       nifree  9440387 nffree  -615
ncg     838     size    39082648        blocks  37889306
bsize   8192    shift   13      mask    0xffffe000
fsize   1024    shift   10      mask    0xfffffc00
frag    8       shift   3       fsbtodb 1
bpg     5830    fpg     46640   ipg     11264
minfree 0%      optim   space   maxcontig 8     maxbpg  2048
symlinklen 60   contigsumsize 8
maxfilesize 0x0000400801017fff
nindir  2048    inopb   64
avgfilesize 16384       avgfpdir 64
sblkno  16      cblkno  24      iblkno  32      dblkno  1440
sbsize  2048    cgsize  8192
csaddr  1440    cssize  14336
cgrotor 0       fmod    0       ronly   0       clean   0x01
flags   none
fsmnt   /backup
volname         swuid   0

The filesystem was almost certainly created by a userland of
about 8 months ago.  I believe that is during the time that
the kernel had its superblock issues?

Neil.