I would like to start experiemnting with the ext filesystems. I might like one day to develop something. :) What files contain the ext4 filesystem. That's what I'm running right now. I like ext 2/3/4 all of them. My fedora partition is only 20 GB in size. I don't need huge filesystem support which is a feature of ext4 I believe. Which feature can I remove to remove this feature? I know it would be done with tune2fs -O ^ and then the feature name. Why would I want to do this. to learn and I don't think I need it. Too much overhead. Bill
On 8/17/14, 2:52 PM, Bill Cunningham wrote:> I would like to start experiemnting with the ext filesystems. I might > like one day to develop something. :) What files contain the ext4 > filesystem. That's what I'm running right now. I like ext 2/3/4 all of them.fs/ext4/*.[ch] fs/jbd2/*.[ch] in the linux kernel source tree.> My fedora partition is only 20 GB in size. I don't need huge filesystem > support which is a feature of ext4 I believe. Which feature can I remove to > remove this feature? I know it would be done with tune2fs -O ^ and then the > feature name.Reading the tune2fs man page would be a start...> Why would I want to do this. to learn and I don't think I need it. Too > much overhead.The only feature unique to "huge filesystems" is the 64bit feature, and it's not used by default on a small filesystem; it also cannot be added or removed with tune2fs after the fact. So the first thing you've learned is that it is not in fact too much overhead, because it's not there. ;) -Eric
----- Original Message ----- From: "Eric Sandeen" <sandeen@redhat.com> To: "Bill Cunningham" <billcun@suddenlink.net>; <Ext3-users@redhat.com> Sent: Sunday, August 17, 2014 4:47 PM Subject: Re: extended filesystems [snip]> So the first thing you've learned is that it is not in fact too much > overhead, because it's not there. ;) > > -EricOk I see. Well I have used fsarchiver to save my ext4 system and the mkfs option to uninstall everything as an ext2 filesystem. Everything uncompress and is written to the block device much more quickly. I know with ext3 there is the journal inode which isn't present on ext2. Well anyway is this list for the entire ext family or just ext3? Bill