1) Better hardware compatibility.
2) Better SMB transfer speed. Openfiler is built on Linux which has a better SMB implementation than FreeBSD.
3) Better Active Directory support. AD support is definitely more advanced in Linux than in FreeBSD.
4) DRBD Support.Cons
1) Free version but commercially oriented. Some of the same features FreeNAS offers for free, Openfiler provides at a cost.
2) Does not support 4k Advanced Format Drives such as the Western Digital Green drives.
3) No ZFS filesystem support.
4) No RAID-Z support.FreeNASPros
1) Better performance with ZFS.
2) Better data security with ZFS, if you happen to use RAID-Z.
3) Completely free, not commercially oriented.
4) Can run on CF cards. CF cards are usually more reliable since they have no moving parts and are more energy efficient. It is basically one less hard drive that can heat up the rest.
5) Supports 4k advanced format drives such as the Western Digital Green drives.Cons
1) If you decide to use ZFS as your file system you can’t use old hardware. The minimum recommended is a 64bit processor, with 4GB of ram and 4 hard drives.
2) Hardware compatibility. FreeNAS runs on FreeBSD, which does not offer the best compatibility with lesser popular chipset brands.
3) No DRBD support.
If you need a storage solution for a big business production environment, Openfiler is probably more adequate, for home use and smaller networks I would definitely recommend freeNAS.
Edited by avelanch, 30 January 2013 - 07:43 AM.