new script checks disk for ssd or hd

report whether a disk drive is solid state or a physical spinning hard disk

diff --git a/scripts/system/report_disk_type.sh b/scripts/system/report_disk_type.sh
new file mode 100644 (file)
index 0000000..8236788
--- /dev/null
+++ b/scripts/system/report_disk_type.sh
@@ -0,0 +1,34 @@
+#!/bin/bash
+
+# reports whether the disk partition provided is spinning physical media or solid state.
+# if no partition is specified, then /dev/sda is the default.
+
+source "$FEISTY_MEOW_SCRIPTS/core/functions.sh"
+
+drive="$1"; shift
+
+# plug in a default drive if none is provided.
+if [ -z "$drive" ]; then drive="sda"; fi
+
+# chop off the /dev/ portion of the disk partition name, if it exists.
+if [[ "$drive" =~ ^/dev/.*$ ]]; then
+  drive="$(echo "$drive" | sed -e 's/^\/dev\///')"
+#  echo "after mangle, drive is: '$drive'"
+fi
+
+#hmmm: could do the check on multiple drives if weren't so lazy.
+
+# let's make sure that the drive exists...
+if [ ! -e "/sys/block/${drive}/queue/rotational" ]; then
+  false || exit_on_error "failed to find a record for drive '$drive'"
+fi
+
+# the value for the block device's rotational parameter should be 1 for hard
+# disks and 0 for SSDs.  apparently the linux kernel has supported this check
+# since version 2.6.29.
+if [ $(cat /sys/block/${drive}/queue/rotational) -eq 0 ]; then
+  echo "drive $drive is a solid state disk."
+else
+  echo "drive $drive is a spinning physical disk."
+fi
+