On Oct 9, 2013, at 6:43 AM, yudi v <yudi....@gmail.com> wrote: > Generally, it's recommended to let ZFS manage the whole disk if possible, > so I was wondering if the second option is better. > I will be using couple of 3TB HDDs mirrored for data and want to encrypt > them.
IIRC, there is/was a major performance-difference on Solaris between using ZFS on a partition, or a whole disk. FreeBSD is happy with either. The two alternatives you mentioned were: ZFS over GELI over disk and ZFS over GELI over ZFS over disk While ZFS wouldn't get the raw disk in setup #1, the left-most ZFS wouldn't get it in the second scenario either. > I am hoping someone with an in-depth understanding of ZFS will be able to > offer some insight. What I usually do and recommend is using GPT with labels for the partitions you'll put GELI/ZFS on. There's a couple of different reasons for this: * It'll let you create your zpool on /dev/gpt/label, which will make it easy to find even when the device moves (harddisk-renumbering, changes from internal ATA to USB enclosure… ) * You don't run things through ZFS twice. * The disk is fully encrypted. * etc Terje
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