Date: Thu, 1 Sep 2011 07:06:23 +1000 From: Peter Jeremy <peterjeremy@acm.org> To: Engineering <ee@athyriogames.com> Cc: freebsd-fs@freebsd.org Subject: Re: Read-only disk problem Message-ID: <20110831210623.GB25698@server.vk2pj.dyndns.org> In-Reply-To: <020d01cc6724$0f0410b0$2d0c3210$@com> References: <01c801cc667f$f99eb7b0$ecdc2710$@com> <020d01cc6724$0f0410b0$2d0c3210$@com>
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--cmJC7u66zC7hs+87 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2011-Aug-30 09:49:41 -0500, Engineering <ee@athyriogames.com> wrote: >Hi, I've attached some more info. Doing a fsdump shows the following chang= es >over reboot > >magic 19540119 (UFS2) time Tue Aug 30 03:08:04 2011 >... >cg 1: >magic 90255 tell 4b1c000 time Tue Aug 30 03:08:04 2011 > >Changes to > >magic 19540119 (UFS2) time Tue Aug 30 03:13:14 2011 >... >cg 1: >magic 90255 tell 4b1c000 time Tue Aug 30 03:13:14 2011 It's normal for CG's and superblocks to be updated when there's any activity on a read-write UFS. (By default, the inode atime field will be lazily updated when the inode is accessed, so just reading =66rom a UFS mounted RW is enough to cause writes). >Is there any data that is written to the disk at boot or mount time, and if >so, is there a way to prevent it? Are you sure that the FS is mounted read-only? / is automatically mounted read-write unless 'root_rw_mount=3D"NO"' is specified in /etc/rc.conf. If a filesystem is mounted read-only, it will not be updated at all. --=20 Peter Jeremy --cmJC7u66zC7hs+87 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk5eok8ACgkQ/opHv/APuIfzTwCdGUahmlNAJX9lErJpUdSxn3kM jCcAnj/EO/eFuzcPcnhyVnbZ5s0mPB2F =kWYR -----END PGP SIGNATURE----- --cmJC7u66zC7hs+87--
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