I would like to know what would be the best filesystem configuration for a Samsung SSD 830 of a fresh Ubuntu 12.04 install on my laptop (Asus U33JC). I've seen people suggesting a RAID configuration, but I have no idea where to start with this.


Just use ext4 filesystem with discard mount option.

RAID is designed for multiple disks (be it HDDs or SSDs) and is used on servers.

See also:

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  • Thanks for the answer. I've got it under default options in Ubuntu 12.04, but I am not sure if that includes the discard option. What would the discard option do? – 719016 Jul 25 '12 at 9:09
  • this enables the trim function of the SSD. THe blocks on the ssd will be freed up when a file is deleted. This way you gain performance, but introduces a little extra wear to the ssd. – gajdipajti Jul 26 '12 at 19:13

To enable discard you should alter the /etc/fstab file. Mine looks like this after a clean install using two SSDs:

# / was on /dev/sda2 during installation
UUID=bd379bf3-bb3a-4c0e-a7e0-c6545903eb26 /               ext4    noatime,discard 0       1
# /boot/efi was on /dev/sdb1 during installation
UUID=3AE5-1A3B  /boot/efi       vfat    defaults        0       1
# /data/large was on /dev/sda6 during installation
UUID=69c10986-d12f-47d1-a90d-8c8b07909b4b /data/large     ext4    noatime,discard        0       2
# /data/medium was on /dev/sdb2 during installation
UUID=e9c90115-6530-4866-b43c-8084d87769e1 /data/medium    ext4    noatime,discard        0       2
# /data/small was on /dev/sda3 during installation
UUID=e22f25a0-b8de-48dd-8799-b525f2afadff /data/small     ext4    noatime,discard        0       2
# /home was on /dev/sda1 during installation
UUID=8e2e8638-2098-4282-9a33-9d32db0932b7 /home           ext4    noatime,discard        0       2

The noatime means it won't update the "last access time" when you open the files, saving a few extra writes.

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