Date: Tue, 6 Feb 2001 19:35:32 +0200 From: Ruslan Ermilov <ru@FreeBSD.ORG> To: Panagiotis Astithas <past@netmode.ntua.gr> Cc: stable@FreeBSD.ORG Subject: Re: df output incosistency Message-ID: <20010206193532.A7821@sunbay.com> In-Reply-To: <20010206192656.B6939@netmode.ece.ntua.gr>; from past@netmode.ntua.gr on Tue, Feb 06, 2001 at 07:26:56PM %2B0200 References: <20010206192656.B6939@netmode.ece.ntua.gr>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Feb 06, 2001 at 07:26:56PM +0200, Panagiotis Astithas wrote:
> Running df on my laptop with softupdates enabled, produces the
> following output:
>
> Filesystem 1K-blocks Used Avail Capacity Mounted on
> /dev/ad0s1a 99183 43709 47540 48% /
> /dev/ad0s1e 2750654 2112356 418246 83% /usr
> procfs 4 4 0 100% /proc
>
> As you can see there is a difference between the total number
> of blocks and the sum of used+available blocks. Particularly
> in the case of /usr there are more than 200MB "lost". Now,
> this came up while I was building a large port and erasing a
> very large file, about the size of the lost space. In the process
> the filesystem became full, and I had to stop the rm process,
> stop the build, reboot and fsck the disks (which did find errors).
> After that df always reported the mismatch you can see above. At
> that time the system was 4.2-STABLE as of early December IIRC, so
> I suspected a bug in df or ufs or softupdates and I upgraded the
> system, to no avail. I have since used the system as usual, with
> the only remarkable exception that a few times when I exceeded the
> available disk space (as indicated by df), the operations continued
> without a problem, although df reported a negative available space.
>
> My question is, can I reclaim the apparently lost space without
> using newfs? Is df lying and I can safely ignore the available
> space reading, or doing so will corrupt my filesystem even worse?
>
> Any help on this would be highly appreciated, since I will not be
> able to newfs my drive for a few months.
>
The UFS filesystem normally reserve about 8% of space.
If you run the above command, you should see numbers around 92:
df -P -t ufs | awk '{ print $1, ($3+$4)/$2*100 }'
Cheers,
--
Ruslan Ermilov Oracle Developer/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
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20010206193532.A7821>