filesystem size after newfs

[mojo fms]

On Mon, Aug 10, 2009 at 3:55 PM, Naeem Afzal <nafzal at hotmail.com> wrote:

>
>    I created this small partition of 512K bytes on disk, I am noticing
> about 24% is used up before system can be mounted and used. My assumption
> was about 4% is supposed to be used if minfree is set to 0.
>
>    #newfs -U -l -m 0 -n -o space /dev/ad1d
>    /dev/ad1d: 0.5MB (1024 sectors) block size 16384, fragment size 2048
> using 1 cylinder groups of 0.50MB, 32 blks, 64 inodes with soft updates
>    super-block backups (for fsck -b #) at:
>    160
>    #mount /dev/ad1d /test
>    #df -H /test
>    Filesystem    Size    Used  Avail Capacity  Mounted on
>    /dev/ad1d      391k    2.0k    389k    1%    /test
>    Could someone explain where the 512-391=121K of disk space went to? What
> is the relation between this used of space and total paritition size or is
> it some fixed ratio?
>    Thanks & Regards
>     Naeem
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5% to root, and the rest i am assuming file system blocks.  Try making the
512k partition bigger accounting for those things and you should be able to
get it really close to 512k available.

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