Heiko wrote:
Hello,
i am planning to convert my fileserver from ubuntu to nexenta and I did
some reading into ZfS.
Would it be possible to setup a raidZ with first just one disk, than
copy data onto that disk and than add another disk?
I ask because I have 3 500GB disks where 2 are full and one is empty,
so i would create a zfs pool(?) wiht the empty disk, copy the data
from the second to that zfs, than add the second disk to the zfs pool,
after that I copy the data from the third disk and finally add that
disk to the pool. Will then when one disk dies my data still save?
Hoe much spave will I have at the end? Can I later add a 1TB drive and
use the whole TB?
You can do this with mirror-sets, but not with raidz. Expanding raidz
one-disk-at-a-time is a feature that a lot of ZFS users want, but it's
not yet implemented. The ZFS development team is aware of this (and
sympathetic) but, last I heard, they don't have the time to tackle it
yet. They've posted a bunch of design documents describing how to
implement this feature, and offered to answer questions about it -- but
Sun's big-dollar customers are demanding other features (like on-disk
encryption) first.
The docs on opensolaris.org about zfs look pretty good, or do you have
a manuall how a solaris beginner can setup a fileserverr with nexenta?
Will my standard PC hardware work with nexenta? I have a P4 2.8Ghz,
Gigybyte KNXP Mainboard, 2x sil3124 SATA Controllers, Geforce3 GC.
The documents on opensolaris.org are, indeed, very good -- and they're
written by Sun. The ZFS Administration Guide is very good:
http://opensolaris.org/os/community/zfs/docs/zfsadmin.pdf
Everything that I learned about ZFS from Solaris/OpenSolaris has applied
Nexenta, so far. The only gotcha is that ZFS is still a moving target,
so the version of ZFS that's included in Solaris 10 U5 doesn't have all
of the features that are discussed on the zfs-discuss listserv. Nexenta
is based on the OpenSolaris kernel, though, so its version of ZFS that
you're likely to use is fairly new -- but you do have to check the
version numbers sometimes.
I hope this helps,
-Luke
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