From 66a71dc8f9e9644480730d9eade09a829fb51ba5 Mon Sep 17 00:00:00 2001
From: eater <=@eater.me>
Date: Fri, 23 Oct 2020 18:40:02 +0200
Subject: [PATCH] more info about zpool and vdevs

---
 data/posts/pre-flight-nas-checklist.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/data/posts/pre-flight-nas-checklist.md b/data/posts/pre-flight-nas-checklist.md
index dd45b33..7849453 100644
--- a/data/posts/pre-flight-nas-checklist.md
+++ b/data/posts/pre-flight-nas-checklist.md
@@ -94,9 +94,10 @@ First there's ARC, ARC will eat your memory, worse than a webbrowser does, BUT i
 Then there's how ZFS internally works, if you're planning to expand over time, this is _very_ important.
 
 ZFS works with `zpool`'s and `vdev`'s.
-A `zpool` is basically the mount or disk™ you'll be seeing inside your OS, while a `vdev` is a set of disks in a particular RAID setup.
-Now this is an important distinction because a `vdev` is immutable (except for replacing disks), this means you're unable to remove (yes, removing a disk is Very Hard resulting in me calling `zfs` a poison) or add disks to a vdev.
+A `zpool` is basically the mount or disk™ you'll be seeing inside your OS and is basically a bunch of `vdev`'s together (kind of a bunch of `vdev`'s in RAID0), while a `vdev` is a set of disks in a particular RAID setup, acting as a single (virtual, yes that's where the `v` comes from) device.
+Now this is an important distinction because a `vdev` is immutable (except for replacing disks), this means you're unable to remove (yes, removing a disk is Very Hard resulting in me calling `zfs` a poison) or add disks to a `vdev`.
 So if you chose ZFS, be aware that you need to add disks in pairs, this means if you're using RAID1/mirror, you need to add 2 disks at a time, if you're using RAIDZ you need to add 3 disks at a time etc.
+Everytime you add a new pair of disks to your pool, you'll be adding a new `vdev` in that RAID setup, you can also technically mix and match, but uhh. I don't recommend that.
 
 If you're just throwing a portion of your income to your NAS this can be very frustrating since you might need to wait for a few months to add new storage, while you have the disks laying around for a while.