Bob Friesenhahn <bfrie...@simple.dallas.tx.us> writes: > On Thu, 19 Mar 2009, Harry Putnam wrote: >> I've created a zpool in raidz1 configuration with: >> >> zpool create zbk raidz1 c3d0 c4d0 c4d1 > > This is not a very useful configuration. With this number of disks, > it is best to use two of them to build a mirror, and save the other > disk for something else (e.g. to build a mirrored root pool). Mirrors > perform better, are more fault tolerant, and are easier to administer.
Ok, I was going by comments on a site called Simons' blog that tells you how to set things up with zfs. Of course it is just one guys opinion. Let me just say a couple of words about my intended usage. I'm building a home NAS server for my home lan using opensolaris and zfs. I will be backing up 4 Windows XP boxes, 2 of which are used primarily for processing video. And eventully I'd be storing finished video projects too. Often these projects run to 50gb or so. But I don't do so many. Maybe 9-12 in a yr. So I'd want to put ghosted images of each machine OS (several apiece) and running backups (incremental) that would stretch back a few weeks. And the projects mentioned above. As well as what is becoming quite a large photo collection. Also 2 linux boxes will getting backed up there. I thought the kind of redundancy offered by raidz1 would be enough for my needs and would allow me to get a little more storage room out of my disks than mirrored setup. I suspect as well, that the access times in raidz1 or mirrored would be vastly higher than what the low end consumer grade NASs that are availabe offer. I did try one out.. a WD Worldbook (about $200 US) that advertises gigabit access but in use cannot even come close to what a 10/100 connect can handle. So raidz1 would probably be adequate for me... I wouldn't be putting it to the test like a commercial operation might. You mentioned admistration was a bigger problem with raidz1, can you be more specific there?... I have really know idea what to expect in that regard with either technique. > With five disks, raidz1 becomes useful. The three 500gb I have now are all one brand and model number and IDE ata. If I were to expand to 5, those 2 would need to be sata or else I'd also need to add a PCI IDE controller. With that in mind would it be problematic to make up the 5 by adding 2 sata 500gb to the mix? _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
