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Re: not mounting ext3, 2.4.10



On Tue, Sep 25, 2001 at 10:01:23AM -0600, Andreas Dilger wrote:
> On Tue, Sep 25, 2001 at 04:50:36PM +0100, Stephen C. Tweedie wrote:
> > On Tue, Sep 25, 2001 at 09:31:54AM -0600, Andreas Dilger wrote:
> > > You cannot create an ext3 journal with 2.4.10 kernel.
> > 
> > It should be OK if the partition is unmounted, or if it is mounted
> > readonly.  If it's mounted readonly then you have to unmount it or
> > reboot afterwards: remounting it readwrite will undo the tune2fs
> > superblock update.
> 
> Yes, you are correct, you can create it on an unmounted fs.  However,
> it is NOT possible to create it on a read-only mounted fs, because
> it needs to be able to write into the filesystem to create .journal.
> To create a journal on root, you need to boot to another kernel (even
> one that doesn't support ext3 will work), or boot from a rescue disk.
> 

Is it true now that you can't modify the block device once it is mounted now
that the buffer cache is in the page cache?

Unless the kernel is denying writes to the block device from tune2fs, then a
read-only mount has changed to a write simetimes mount?

Sorry, haven't tried 2.4.10 yet...





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