Re: [gentoo-user] can't mount ext4 fs as est3 or ext3

[Michael Hampicke]

Am 25.04.2013 16:26, schrieb gottl...@nyu.edu:
I get the following in /var/log/messages
EXT3-fs (sda5): error: couldn't mount because of unsupported optional
features (240)
...
EXT4-fs (sda5): couldn't mount as ext2 due to feature 
incompatibilities
...
EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: 
(null)

Here is the entry in fstab

/dev/sda5           /           ext4    noatime,discard      0 1

I am having no difficulty, but seeing the first (error) message every
day in logwatch is annoying.

Since all my fs are ext4 I could remove ext3 support from the kernel
(3.5.4).  Is that the recommended procedure?

I'm not sure, but I don't think you can mount ext4 as ext2/3 with the 
discard option (ssd trim) present. Only ext4 does support discard.