ZFS installed on Partitions

[MidnightCritic]

What happens to the drive when ZFS is installed on partitions, and a partition fails?
Lets say I have 4 drives and each drive has 3 partitions. Total of 12 partitions.

If a partition fails, does the entire drive fail, or just the partition on the drivel, and do the remaining 2 partitions continue normally?

Thanks, Glen

[IvanVolosyuk]

How do you envision the failure mode when partition fail? If it IO errors - it is no different from any other IO error, with too many errors ZFS will fail the partition.

The chances are that entire drive will fail and you loose all the partitions on that drive. So, it doesn't make too much sense to create say raidz from this layout - for a single disk failure your pool is gone.

Also, if we are talking about HDDs - if you add multiple partitions from the same drive to a pool - you can through out of the window any optimizations ZFS does in allocator to minimize seek delays. Also you ask ZFS to write some of the metadata 3 times (multiply that by the number of copies ZFS already does).

[MidnightCritic]

I think your response is far more complicated than my question and doesn't really address what I was asking.

I do appreciate your response and will try and figure out how it applies to my question.
Thank you for commenting.