zfs/cmd/zpool/zpool.d/media

#!/bin/sh
#
# Print out the type of device
#

if [ "$1" = "-h" ] ; then
	echo "Show whether a vdev is a file, hdd, ssd, or iscsi."
	exit
fi

if [ -b "$VDEV_UPATH" ]; then
	device=$(basename "$VDEV_UPATH")
	val=$(cat "/sys/block/$device/queue/rotational" 2>/dev/null)
	if [ "$val" = "0" ]; then
		MEDIA="ssd"
	fi

	if [ "$val" = "1" ]; then
		MEDIA="hdd"
	fi

	vpd_pg83="/sys/block/$device/device/vpd_pg83"
	if [ -f "$vpd_pg83" ]; then
		if grep -q --binary "iqn." "$vpd_pg83"; then
			MEDIA="iscsi"
		fi
	fi
else
	if [ -f "$VDEV_UPATH" ]; then
		MEDIA="file"
	fi
fi

echo "media=$MEDIA"