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RE: Resizing ext2 and ext2

From: Jonathan Reed
Subject: RE: Resizing ext2 and ext2
Date: Mon, 28 Jun 2004 17:14:23 -0400

I don't pretend to be an ext2 guru, but I don't think it's a bug that you can't fix it with tune2fs. "Undoing" sparse superblocks is not really something that you can actually do without re-creating the filesystem, AFAICT.

However, I am glad that someone else could reproduce what I was seeing.

So, is it possible that parted will support ext2 filesystems created with
-O sparse_superblock (which appears to be the default for large partitions on most any 2.4 distribution, not just RHEL?


At 2:05 PM -0700 6/28/04, Nikolay Enev wrote:

Thanks for the quick response. I tested -O none and parted did resize the fylesystem thus created. However, using tune2fs -O on a file system created with the default option did not work after the fact. Is there a bugzilla report on that ?

-----Original Message-----
From: Jonathan Reed [<mailto:address@hidden>mailto:address@hidden
Sent: Monday, June 28, 2004 10:36 AM
To: Nikolay Enev
Cc: 'address@hidden'
Subject: Re: Resizing ext2 and ext2

This is the same problem I sent mail about a while back.  (sometime
last month).  It seems to be related to sparse superblock layout.  I
found that if you do
mke2fs -O none, parted will work fine.  It doesn't seem to be
RHEL-specific.  If you do mke2fs -O sparse_super and have a large
enough partition (say several GB) on any recent Linux, it'll fail
with the same message.

I never got a reply to my initial mail though, and I don't know
enough filesystem-fu to attempt to submit a patch.


At 10:25 AM -0700 6/28/04, Nikolay Enev wrote:
I am not able to resize partitions under RHEL 3.0. The error is :"No
implementation. This ext2 filesystem has a rather strange layout.
Parted cannot resize this (yet)." I am using a generic Adaptec AIC
driver on a 160 MB/s SCSI drive. Suggestions ?

Nikolay Enev
Senior Systems Engineer

nStor Corporation Inc.
6190 Corte Del Cedro,
Carlsbad, CA 92009

(760) 683-2514     Direct
(760) 683-2599     Fax

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