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--- zfs:structure:device [2021/10/13 00:26] – created peter
+++ zfs:structure:device [2021/10/13 00:31] (current) – peter
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 ====== ZFS - Structure - Device ======
+A device is just a random-access block device.
+  * vdevs are made of individual devices, and the zpool is made of vdevs.
+  * Anything with a descriptor in /dev that allows random access will work.
+vdevs can be built from:
+  * Disks - The most common block devices.
+  * Entire hardware RAID arrays can used as individual devices.
+  * Simple raw files.
+    * Test pools made of sparse files are an incredibly convenient way to practice zpool commands, and see how much space is available on a pool or vdev of a given topology.