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Hello Everyone!
This is to let everyone on these list know about my progress concerning Gentoo/m68k. I have been working for the past month on the port and have made signifigant progress. Portage is working, and a Stage1 has been built. However, I was overzealous with my CFLAGS and added -O3, which made my Stage1 chroot do odd things.
Zach Lowry || Murfreesboro, TN || www.zachlowry.net Linux / *BSD / Irix / Solaris / Apple / Unix Network Administration
Registered Linux User #264589 14 Different NetBSD-Supported Machines
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Date: Sun, 15 Jun 2003 03:55:26 -0700 From: "J.P. Larocque" <[EMAIL PROTECTED]> Subject: Re: XPostFacto, YDL on 3400, partitioning strategy Message-ID: <[EMAIL PROTECTED]> In-Reply-To: <[EMAIL PROTECTED]>
On Tue, Jun 10, 2003 at 09:04:47AM -0400, [EMAIL PROTECTED] wrote:Funny you suggest ext3, because I've been thinking about that too, when it didn't come up as an option during formatting. How do I convert ext2 to ext3?
Google is your friend. :-) http://www.troubleshooters.com/linux/ext2toext3.htm Steve Litt has lots of good articles in his online mag; it's worth poking around the site.
Are there any drawbacks to doing so?The referenced article mentions a couple -- first, if you're converting the boot partition, you have to go through the entire sequence or it's hosed;
I have no idea what the author is talking about with the mkinitrd command. It shouldn't be necessary. Perhaps it's a RedHat-ism? Could someone explain? Other signs of RedHat-isms in the article are vital utilities like tune2fs being located in the /usr tree--Debian for one keeps stuff like that in /bin and /sbin, to avoid disaster.
A more relevant concern for some Mac users is that Quik, being a "smart" bootloader that reads the kernel from the ext2 filesystem by interpreting the filesystem structure, has issues with ext3, occasionally. In most cases, things will work fine, because ext3 is compatible with ext2 software *as long as the filesystem was unmounted properly*. If the system crashes, Quik won't be able to load the kernel. The solution is to set aside a dedicated /boot filesystem, and keep that filesystem ext2-only. Make everything else, even the root directory, whatever filesystem you like.
If you use BootX, there's no need for /boot to be a separate filesystem; the kernel will already be stored on a Mac OS HFS filesystem.
second, going back to ext2 sounds like something I really wouldn't want to deal with. I wonder if it might be safer to reformat & reinstall (in either case).
The author of the troubleshooters.com article doesn't seem very knowledgeable. He writes, "Converting the root directory from Ext2 to Ext3 isn't difficult, but converting it back from Ext3 to Ext2 is a treacherous process fraught with problems." There's nothing special about the root directory, other than that it's always mounted. He fails to realize it can be mounted in read-only mode. Observe a test filesystem:
$ /sbin/tune2fs -l test-fs | grep Journal Journal UUID: <none> Journal inode: 8 Journal device: 0x0000 $ sudo mount -t ext3 -o ro,loop test-fs /mnt/tmp1 $ touch /mnt/tmp1/foo touch: creating `/mnt/tmp1/foo': Read-only file system $ /sbin/tune2fs -O ^has_journal test-fs tune2fs 1.27 (8-Mar-2002) $ sudo umount /mnt/tmp1 $ /sbin/tune2fs -l test-fs | grep Journal $ /sbin/e2fsck -f test-fs e2fsck 1.27 (8-Mar-2002) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information test-fs: 11/2048 files (0.0% non-contiguous), 274/8192 blocks
The purpose of the e2fsck command is to check for corruptions. I doubt it's required, but I couldn't say. I can say that the filesystem will remain as being marked "clean", even after using tune2fs on the block device. That means the author's e2fsck examples are meaningless, since the -f option is not specified.
To perform this operation on a running system, without bothering with Knoppix, bring the system into single user mode (that means 'shutdown now', not 'init=/bin/sh' at your bootloader's prompt), change the root directory entry in /etc/fstab to type 'ext2', unmount all non-root filesystems, remount the root filesystem as read-only ("mount -o remount,ro /"), then simply run the appropriate tune2fs command. After a reboot, all should be well.
Not so treacherous after all.
--
- J.P. Larocque, <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>
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