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Re: Inode 196617 has imagic flag set



On Mon, 6 Dec 2010, Ted Ts'o wrote:

To: Keith Roberts <keith karsites net>
From: Ted Ts'o <tytso mit edu>
Subject: Re: Inode 196617 has imagic flag set

On Mon, Dec 06, 2010 at 01:07:38PM +0000, Keith Roberts wrote:

Maybe e2fsck was getting confused at having two partitions with the
same partition label on the system?

Well, the blkid library, specifically, was getting confused.  E2fsck
uses the blkid library to map LABEL= and UUID= references to device
names.

What about if th blkid library was to report some sort of 'duplicate label name' error, when it maps the devices to label names?

That would be a great help.

One thing that you might do for devices that are always present (which
generally means you're not changing them in your /etc/fstab often) is
to use a UUID= reference instead.  They are definitely less convenient
than labels, but they are also much less likely to cause confusion by
having duplicately labelled file systems.

Granted, no one wants to *type* "mount
UUID=9e132c06-1fd0-4bbd-ad06-5995a8f45b26"; they'd much rather type
"mount LABEL=websites".  But if the only place the a
UUID=... specification shows up is in /etc/fstab, it might be worth
it.

Can I set the UUID value, with some descriptive text,(something like a long label name), or is the UUID only system generated?

Then you can just zap the label on file systems that you only plan to
reference via UUID, and then that reduces the chances for confusion in
the future.

Best regards,

PS Are there any PDF docs that would give me an overview of the ext3
FS, and how it works?

Try the list of Articles and Publications here:

https://ext4.wiki.kernel.org/index.php/Publications

I'm reading up on that stuff now.

The first link in the list is interesting :)

I think the reason the USB has SO MANY errors on the FS is because I possibly unplugged it, before umounting it!

I understand that the umount command flushes any disk I/O buffers back to the drive?

Kind Regards,

Keith Roberts

---

In theory, theory and practice are the same;
in practice they are not.

This email was sent from my laptop with Centos 5.5


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