[ZFS - Pool Fails to Import on Array Start]

@limetech What is the gameplan here with regards to zfs volumes that use high performance nvme partitions for cache/special/zil?

[ZFS - Pool Fails to Import on Array Start]

LT, any thoughts to offer up on this?

[ZFS - Pool Fails to Import on Array Start]

As a bit of an addendum around NVME and ZFS, but also applicable to NVME in general is that underprovisioning NVME is extremely common for extending its service life.  A lot of modern controllers no longer provide the option to underprovision or create separate domains at the hardware level, so it is now accomplished through partitioning.  Fully supporting NVME use cases really does require having the ability to work with partitions as well as entire devices IMHO.

[ZFS - Pool Fails to Import on Array Start]

In the release notes, it mentions reporting zpools topologies that won't import, so I wanted to file the report so it can be added to the list of ZFS topology possibilities to be considered going forward.  The idea of splitting up a very high performance NVME into partitions and using those partitions to serve multiple functions is quite common when balancing availability and performance in ZFS special, cache, and log VDEVs.