Bob Friesenhahn <bfriesen@xxxxxxxxxxxxxxxxxxx> 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
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
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
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?
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