When I run zpool list -v some of my pools have a "-0" suffix after the "raidz2" or "mirror" type string and the remaining columns of that row are misaligned. I think the combination of factors to trigger this is 1. Have a raidz vdev and a cache vdev in the same pool (not seen with single data disk, with or without cache). 2. Be running 13.1 (behavior not present on 12.3). Is "-0" a zero-based index into the non-cache vdevs? If so, it should be omitted when there is only one non-cache vdev. # zpool list -v NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT data 36.4T 18.6T 17.8T - - 25% 51% 1.15x ONLINE - raidz2-0 36.4T 18.6T 17.8T - - 25% 51.2% - ONLINE ada0 - - - - - - - - ONLINE ada1 - - - - - - - - ONLINE ada2 - - - - - - - - ONLINE ada3 - - - - - - - - ONLINE cache - - - - - - - - - ada4p5 150G 51.6G 98.4G - - 0% 34.4% - ONLINE zroot 528G 20.7G 507G - - 5% 3% 1.00x ONLINE - ada4p4 528G 20.7G 507G - - 5% 3.91% - ONLINE $ zpool list -v NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT data 1.81T 1.10T 732G - - 27% 60% 1.02x ONLINE - mirror-0 1.81T 1.10T 732G - - 27% 60.5% - ONLINE da0 - - - - - - - - ONLINE da1 - - - - - - - - ONLINE cache - - - - - - - - - nvd0p5 40.0G 37.5G 2.53G - - 0% 93.7% - ONLINE fast 888G 437G 451G - - 4% 49% 1.00x ONLINE - da7 888G 437G 451G - - 4% 49.2% - ONLINE cache - - - - - - - - - nvd0p7 20.0G 17.1G 2.91G - - 0% 85.4% - ONLINE