Richard Elling wrote:
> Malachi de Ælfweald wrote:
>
>> I have to say, looking at that confuses me a little. How can the two
>> disks be mirrored when the partition tables don't match?
>>
>
> Welcome to ZFS! In traditional disk mirrors,
> disk A block 0 == disk B block 0
> disk A block 1 == disk B block 1
> ...
> disk A block N == disk B block N
>
> In a ZFS world, block 1 might be defective. So ZFS will reallocate
> the block somewhere else. This is great for reliable storage on
> unreliable devices (disks). It also relieves you from the expectation
> that the partition tables must match. And it also means that I can
> grow the pool size by replacing the mirror sides with larger devices.
> Life is good! Enjoy!
>
This functionality is not specific to ZFS. SVM mirroring also does not
require partition tables to match and as in ZFS, one can grow the size
of mirror by replacing larger size disks.
-Sanjay
> -- richard
>
>
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