The ext4 is a journaled file-system, the successor to ext3. In summary the ext4fs greatly improve overall performance, efficiently reduce fragmentation and is fscked much more faster than his predecessor. Actually it has many features which follow :<\/p>\n
If you want to create an ext4 file-system first get the linux kernel (>= 2.6.28) <\/span>which contains the first stable version of the filesystem. Then enable CONFIG_EXT4_FS<\/span> as module or built-in. If you want to try the large files and volume feature add CONFIG_LBD<\/span> actually I didn’t try it since the largest I’ve got here is about 2TB so in what follows I’ll assume you won’t enable this feature. Then install e2fsprogs (>= 1.41)<\/span> and check in \/etc\/mke2fs.conf<\/span> for a line looking like this : <\/span><\/span><\/p>\n ext4 = { Checks the features and inode size (should be at least 256) and remove the huge_file<\/span> feature since we won’t use it. Now reboot on your new kernel, create the partition with fdisk<\/span> or any other tools and let \/dev\/sdb2<\/span> be that partition. Just do as root :<\/p>\n # mkfs.ext4 -I 256<\/span> -m 0<\/span> -L HOME<\/span> \/dev\/sdb2<\/span> This will create an ext4fs on \/dev\/sdb2 <\/span>with 0%<\/span> of reserved blocks for root labelled as HOME<\/span> (always label your file-systems it makes it easier to manage your partitions) and enable every features found in \/etc\/mke2fs.conf <\/span>on it. Give it a try and mount<\/span> it on \/mnt<\/span> try putting some file on it :<\/p>\n # mount -t ext4 \/dev\/sdb2 \/mnt<\/span><\/span><\/p><\/blockquote>\n <\/span><\/span>Now in order to transfer your files to the newly created file-system just do : # mount -t ext4 \/dev\/sdb2 \/mnt && cp -aRv \/home\/* \/mnt\/ && rm -rf \/home\/* && umount \/mnt && mount -t ext4 \/dev\/sdb2 \/home<\/span><\/span><\/span><\/p><\/blockquote>\n Your home directories should now be mounted on the new ext4 file-system. Be sure you didn’t misstyped the last command since it will delete files on the old file-system<\/span>. Then just add a line for it in \/etc\/fstab <\/span>in order to mount it automatically on each boot : \/dev\/sdb2 \/home ext4 noatime 0 2<\/p><\/blockquote>\n <\/span>Now your home directory will be mounted automatically. Repeat that step for each partition and it’s done.<\/p>\n The ext4 file-system is not shown in the squeeze’s debian installer<\/span> so there are three solutions to take advantages of ext4 on the current stable :<\/p>\n I’ll just describe briefly the second solution here since I don’t like the first one neither do I remember every step of the third one. When installing debian create two partition one for \/boot<\/span> (~200MB) and another for the root<\/span>, I mean “\/<\/span>” (~1GB) flagged for use as ext3 or reiserfs (actually I’m using reiserfs). Then install only<\/span> the base-system<\/span>. Rebuild a new kernel with ext4 enabled in it, create partitions for \/var<\/span>, \/usr<\/span>, \/tmp<\/span>, \/home<\/span> and transfer documents as described above. Now continue the installation using aptitude<\/span> and that’s it.<\/p>\n","protected":false},"excerpt":{"rendered":" The ext4 is a journaled file-system, the successor to ext3. In summary the ext4fs greatly improve overall performance, efficiently reduce fragmentation and is fscked much more faster than his predecessor. Actually it has many features which follow : Large file … Continue reading
features = has_journal, extents, huge_file, flex_bg, uninit_bg, dir_nlink, extra_isize
inode_size = 256
}<\/span> <\/span><\/p><\/blockquote>\n
<\/span><\/p><\/blockquote>\n
<\/span><\/span><\/span><\/p>\n
<\/p>\n\n