Am Tue, 30 Jun 2009 20:53:43 +0200 schrieb Sven Joachim <svenjoac@gmx.de>: > On 2009-06-30 20:40 +0200, lee wrote: > > > Anyway, getting the new disks brings up the question which file > > system to use. It seems you can convert ext3 to ext4 later, so I'm > > thinking of using ext3 for now and maybe converting later. On the > > first glance, there doesn't seem to be a disadvantage with doing it > > this way. > > There is, existing files will not take advantage of the new features > of ext4 like extents. Therefore, I would just go straight to ext4 > for new filesystems. > > One caveat, though: grub(-legacy) cannot read ext4, you have to switch > to grub2 (aka grub-pc) or use a separate ext2/3 filesystem for /boot. If the root filesystem to should be on ext4, there are (were?) two additional steps necessary: Adding the ext4 module to the initramfs (/etc/initramfs-tools/modules) and adding rootfstype=ext4 to the kernel parameters. I think ext4 has more advantages on "data" filesystems as /home than on / because the extents feature is AFAIK only better on larger files and / consists massively of smaller files. An important reason to switch to ext4 is the much shorter fsck time (important for fileservers with large filesystems). Andreas
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