Subject: Re: Interesting disk/filesystem anomaly addendum
To: Luke Mewburn <lukem@wasabisystems.com>
From: Bri <itai@replic.net>
List: port-i386
Date: 12/27/2001 00:44:30
dumpfs returns

endian  little-endian
magic   11954   time    Thu Dec 27 00:27:18 2001
cylgrp  dynamic inodes  4.4BSD  fslevel 3       softdep enabled
nbfree  2672921 ndir    87      nifree  24031062        nffree  954
ncg     12114   ncyl    193821  size    97685784        blocks  94487482
bsize   8192    shift   13      mask    0xffffe000
fsize   1024    shift   10      mask    0xfffffc00
frag    8       shift   3       fsbtodb 1
cpg     16      bpg     1008    fpg     8064    ipg     1984
minfree 5%      optim   time    maxcontig 8     maxbpg  2048
rotdelay 0ms    headswitch 0us  trackseek 0us   rps     120
ntrak   16      nsect   63      npsect  63      spc     1008
symlinklen 60   trackskew 0     interleave 1    contigsumsize 8
maxfilesize 0x0000400801017fff
nindir  2048    inopb   64      nspf    2
sblkno  16      cblkno  24      iblkno  32      dblkno  280
sbsize  2048    cgsize  2048    offset  32      mask    0xfffffff0
csaddr  280     cssize  194560  shift   9       mask    0xfffffe00
cgrotor 9301    fmod    0       ronly   0       clean   0x02

and then a bunch of stuff relating to cylinders and clusters. I can
include that as well if you like, but I'm guessing it is going to be
prohibitively large(I did not let it finish.)

 I'll give current a shot, but I prefer to avoid it for this box, as any
issues that it has are a large inconvenience.

itai at replic d0t net

On Thu, 27 Dec 2001, Luke Mewburn wrote:

> On Thu, Dec 27, 2001 at 12:23:59AM -0800, Bri wrote:
>   |  Interestingley, yes. There is about 360Kbyte/sec of activity on the disk
>   | with 99/100% usage according to systat.
>   |
>   |  As far as how nested, it isn't. I was making the directory right in the
>   | top level of where it was mounted. The root of that drive has 4 folders
>   | including the test one that I used to get the time.
>
>
> What does "dumpfs" on the raw device return (e.g, "dumpfs /dev/rwd2a") ?
>
> There is known pathological behaviour in directory creation on
> (large) partitions with certain parameters. This was fixed in
> NetBSD-current earlier this year, and that fix was subsequently
> replaced by the "new" ffs_dirpref() routine. The latter code
> has been pulled up to the NetBSD-1-5 CVS branch (available via
> AnonCVS, or ftp at ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-release-1-5/)
> and will be in NetBSD-1.5.3 (if/when that's released).
>
> I suggest trying a kernel compiled from the latest sources in the
> NetBSD-1-5 branch. If that works, update your userland as well because
> tools like fsck_ffs and newfs have been updated (although the old
> versions should work, I'd still update).
>
> Luke.
>