Date: Sat, 3 May 2003 22:40:39 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/release/scripts doFS.sh Message-ID: <20030503194039.GG97244@sunbay.com> In-Reply-To: <21868.1051990078@critter.freebsd.dk> References: <20030503192559.GE97244@sunbay.com> <21868.1051990078@critter.freebsd.dk>
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On Sat, May 03, 2003 at 09:27:58PM +0200, Poul-Henning Kamp wrote:
> In message <20030503192559.GE97244@sunbay.com>, Ruslan Ermilov writes:
> >> Log:
> >> Use UFS1 for the floppies instead of UFS2
> >>
> >Why? Does it save anything? Last time I tried, it did not.
>
> UFS1 inodes are half the size of UFS2 inodes, so it may gain you
> a bunch of sectors.
>
I now see. I was about to suggest UFS1 for boot floppies, and
thought I saw the difference, and even completed the email with
the patch, but then tested it again and saw no difference in
free space. I now know why, I even recall seeing a PR on the
subject, something about UFS1, UFS2, and newfs(8):
This is on an fd1440-labelled image:
# newfs -O1 md0a
/dev/md0a: 1.4MB (2880 sectors) block size 4096, fragment size 512
using 4 cylinder groups of 0.36MB, 91 blks, 192 inodes.
super-block backups (for fsck -b #) at:
32, 760, 1488, 2216
# df /dev/md0a
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/md0a 1279 0 1177 0%
# newfs -O2 md0a
/dev/md0a: 1.4MB (2880 sectors) block size 4096, fragment size 512
using 4 cylinder groups of 0.36MB, 91 blks, 192 inodes.
super-block backups (for fsck -b #) at:
144, 872, 1600, 2328
# df /dev/md0a
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/md0a 1127 0 1037 0%
# newfs -O1 md0a
/dev/md0a: 1.4MB (2880 sectors) block size 4096, fragment size 512
using 4 cylinder groups of 0.36MB, 91 blks, 192 inodes.
super-block backups (for fsck -b #) at:
32, 760, 1488, 2216
# df /dev/md0a
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/md0a 1127 0 1037 0%
Cheers,
--
Ruslan Ermilov Sysadmin and DBA,
ru@sunbay.com Sunbay Software AG,
ru@FreeBSD.org FreeBSD committer,
+380.652.512.251 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
http://www.oracle.com Enabling The Information Age
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