Date: Tue, 28 Mar 2000 13:02:18 -0500 (EST) From: Kenneth W Cochran <kwc@world.std.com> To: "Eric S . Van Gyzen" <lists@vangyzen.net> Cc: freebsd-stable@freebsd.org Subject: Re: R/W mount of ext2fs fails Message-ID: <200003281802.NAA02837@world.std.com>
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>From owner-freebsd-stable@FreeBSD.ORG Tue Mar 28 11:45:55 2000
>Date: Tue, 28 Mar 2000 11:38:20 -0500
>From: "Eric S . Van Gyzen" <lists@vangyzen.net>
>Subject: R/W mount of ext2fs fails
>
>I just upgraded from 3.4-STABLE to 4.0-STABLE and am having
>problems mounting my Linux partition. The Linux root filesystem
>is on /dev/da0s3. Here's what happens:
>
> # mount -t ext2fs /dev/da0s3 /mnt/linux
> ext2fs: /dev/da0s3: Invalid argument
> # ls -l /dev/da0s3
> crw-r----- 1 root operator 13, 0x00040002 Mar 28 11:35 /dev/da0s3
>
>Syslog reports:
> /kernel: WARNING: R/W mount of #da/0x40002 denied due to
> unsupported optional features
>
>Huh? To what "unsupported optional features" is it referring?
1. The new "dynamic" version 1 ext2 filesystem. Previously
this was version 0.
2. "sparse_superblock"
>In case it matters, the Linux installation is Red Hat 6.1. And
>I do have
> options EXT2FS
>in my kernel config. I thought maybe the filesystem wasn't clean,
>so I booted Linux and fsck'ed, only to get the same results.
It also happens with Slackware 7.0 & I'm sure others, effective
with 3.4-STABLE as of a couple of weeks ago...
>Thanks for any help, or pointers to documentation that I should
>have read...
>
>-Eric
>
>FreeBSD 4.0-STABLE #0: Thu Mar 23 15:16:02 EST 2000
Check the archives of this list & freebsd-fs from just a few
days ago...
This (new) behavior of FreeBSD's ext2fs support is really a
bugfix, introduced a couple of weeks ago into RELENG_3. And
they have Good Reason to have done this... :) I have been able
to mount the new ext2 fs readonly, but r/w appears to now only
be supported for the "old" style ext2 fs.
-kc
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