Is there a reason why the example in Linear Span points to sdX instead of virtual disks? Having "...they are free to experiment without fear of actual data loss" in the beginning could make you feel safe and pasting that accidentally. Strikemybread (talk) 16:06, 16 June 2020 (UTC)
Hi, this article seems to imply that "vdev" in ZFS is just another term for "virtual disk". I'm no expert, but I don't think that's correct.
The man page of zpool says that vdevs can be files, disks, or collections of disks such as mirrors and RAIDZ arrays: so a physical disk can definitely be a vdev.
The same page says that vdevs can't be nested. In the examples here, the files are added as members to either mirrors or arrays, so I don't think they are vdevs themselves. Andrea (talk) 16:17, 19 May 2021 (UTC)