Hi Greg, With two disks, I would start with a mirror. Then, you could add two more disks for expansion. You can also detach disks in a mirrored configuration. Or, you could attach another disk to create a 3-way mirror.
With a RAIDZ configuration, you would not be able to expand the two disks to three disks. You would have to add two more disks. See the examples in this section of the ZFS Admin Guide. http://docs.sun.com/app/docs/doc/819-5461/gayrd?a=view Cindy On 10/15/09 10:45, Gregory Gee wrote:
While playing with zfs at home on my DIY NAS, to try zfs and raidz, I setup 2 disks in a raidz pool. I started to think, in this scenario, does a 2 disk raidz actually provide any protection? I don't know the under parts of parity data in zfs. It didn't complain when I created it. To that, if I only have 2 disks to start, should I start with a raidz or mirror? Is there issues with future expansion and disk replacement? Thanks, Greg
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