add get-first-two-disks.sh

Author: chrisjsimpson

src/get-first-two-disks.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+set -x
+
+# The two smallest disks are always used as the boot and root pool
+# as a ZFS mirror.
+# This script automates:
+# - Finding the first two smallest disks (excluding Floppy and virtual disks)
+# - TODO install ing the root & boot pools onto them
+# - Based on manual steps in OpenZFS docs:
+# https://openzfs.github.io/openzfs-docs/Getting%20Started/Fedora/Root%20on%20ZFS.html#:~:text=page%20for%20examples.-,Declare%20disk%20array,-DISK%3D%27/dev
+
+
+# For each disk found, get it's /dev/disk/by-id address by querying udevadm
+# Initilize DISK list
+DISK=""
+
+DISK_ADDRESSES=$(lsblk --bytes --json -S -o type,name,label,size,model,serial,wwn,uuid | jq -r 'limit(2; [.blockdevices[] | select(.type=="disk" and (.model | contains("Floppy") or contains("Flash Disk") | not))] | sort_by(.size) | .[]) | .name')
+
+for DISK_ADDRESS in $DISK_ADDRESSES
+do
+        DISK_UDEV_PATH=/dev/$(udevadm info --query=symlink  --name=/dev/"$DISK_ADDRESS"| cut -d ' ' -f 1)
+        # Append disk to $DISK list
+        DISK="$DISK $DISK_UDEV_PATH"
+done
+
+echo DISK is now set to: "$DISK"
+
+
+
+