Originally Posted by johnko1
Can you explain me what is zfs format?From what I understood it checks the drive for errors so data corruption chance is reduced.I may end up doing raid-5 eventually,that's why I'm asking about it (soft raid)
Still haven't found an OS that suits my needs,some friends suggested freenas or fileserver.What's your opinion about that?
I may buy the hdds early 2013,when the prices fall or stabilise
PS.(3tb wd red costs 165 euro here!!)
Searching through this thread I didn't see anyone replying to this with information, so I think I will take a stab at it. Although this comes about 2 months after your posting Johnko1, if you planned on purchasing/setting up your system at the beginning of 2013 I hope this information is still useful to you and can provide some insight.
So, ZFS stands for Z
ystem and was developed may years ago by Sun Microsystems for use in their Solaris operating systems. Over the years the functionality of ZFS has not only been expanded to include features such as integarted compression and encryption, but it has always found its way onto other operating systems, most notably Linux and various BSD distributions.
Now, regarding your question as to what it is. Think of ZFS as combining an LVM (Logical Volume Manager) and a filesystem together into the same package. That is, ZFS keeps track of the physical disks and the logical volumes on top of it as well as providing filesystem-type functionality. Setting up a Raid-5 within ZFS is certainly doable, although within ZFS it is called a raidz (or raidz1). I actually have raidz setup on 4 x 1.5TB and a separate raid-mirror (ZFS nomenclature for a Raid-1) using 2 x 1TB disks without any problems.
Aside from the OSes that I mentioned above FreeNAS does appear to support ZFS and certainly seems like a route that is possible. I have not personally used FreeNAS so I can not speak to it.
Hopefully, that has answered your questions. If I ultimately missed the mark, or you have more questions feel free to follow up. I didn't want to get into the weeds, so to speak, with techincal details as I wasn't sure if you wanted that level of detail. I would be more than happy to though if you would like
Aside from the one link I have posted below, which simply points to the ZFS Wikipedia article, there are some very good blog entries scattered on the web, particularly on the Sun site that can provide some good information. I didn't not have any of these readily handy at the moment, but might be able to find them if there is interest.
References (because everyone loves references):
- Decent article explaining history of the filesystem, progression of features, operating systems that support ZFS, and many additional references for further reading.