hdd: commit all files

hdd/assemble.sh

+# mdadm --assemble [--force] /dev/md5 /dev/sdd1 /dev/sdc2
+
+#mdadm: No md superblock detected on /dev/sdb5. BIOS boot 
+# free??
+#mdadm: No md superblock detected on /dev/sdc2. ?
+#mdadm: No md superblock detected on /dev/sde1. BIOS boot

hdd/functions.sh

+#!/bin/sh
+
+# arg: /dev/sd?
+is_hdd()
+{
+    local rot
+    local dev="$(echo "$1" | cut -c1-8)"
+    [ -b "$dev" ] || fatal
+
+    #hdparm -i "$1" | grep -q "Model=WDC"
+    local drive="$(basename $dev)"
+    # since 2.6.29
+    rot="$(cat /sys/block/$drive/queue/rotational)"
+    [ "$rot" = "1" ]
+}
+
+# https://unix.stackexchange.com/questions/65595/how-to-know-if-a-disk-is-an-ssd-or-an-hdd
+# lsblk -d -o name,rota
+# NAME ROTA
+# sda     1
+# sdb     1
+# sdc     0
+# sdd     0