Is RFE 4852783 (need for an equivalent to LVM2's pvmove) likely to happen within the next year?
My use-case is home user. I have 16 disks spinning, two towers of eight disks each, exporting some of them as iSCSI targets. Four disks are 1TB disks already in ZFS mirrors, and 12 disks are 180 - 320GB and contain 12 individual filesystems. If RFE 4852783 will happen in a year, I can move the smaller disks and their data into the ZFS mirror. As they die I will replace them with pairs of ~1TB disks. I worry the RFE won't happen because it looks 5 years old with no posted ETA. If it won't be closed within a year, some of those 12 disks will start failing and need replacement. We find we lose one or two each year. If I added them to ZFS, I'd have to either waste money, space, power on buying undersized replacement disks, or else do silly and dangerously confusing things with slices. Therefore in that case I will leave the smaller disks out of ZFS and add only 1TB devices to these immutable vdev's.
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