Add drives.sh to check smartctl on drives with alias

drives.sh

@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+#
+# A script that:
+#  1) Looks up custom-aliased disks in /dev/disk/by-vdev/.
+#  2) Only parses lines from the Vendor Specific SMART Attributes table.
+#  3) Filters by specific attribute IDs.
+#  4) Shows only [ID] [Attribute Name] [Raw Value].
+#  5) For attributes 241/242, appends (XX.XX TB) in the Raw Value if numeric.
+
+set -e
+
+VDEV_DIR="/dev/disk/by-vdev"
+ATTR_IDS="1|4|5|7|9|12|187|188|190|194|197|198|199|241|242"
+
+# Ensure the /dev/disk/by-vdev directory exists
+if [ ! -d "$VDEV_DIR" ]; then
+  echo "Directory $VDEV_DIR does not exist or is not accessible."
+  exit 1
+fi
+
+for link in "$VDEV_DIR"/*; do
+  # Skip if it's not a symlink
+  [ -L "$link" ] || continue
+
+  # Resolve the symlink to the underlying device (e.g., /dev/sda)
+  realdev=$(readlink -f "$link")
+
+  # Check if the resolved path is a block device
+  if [ ! -b "$realdev" ]; then
+    echo "Skipping '$link' -> '$realdev' (not a block device)."
+    continue
+  fi
+
+  echo "======================================================="
+  echo -e "SMART Information for alias:  \e[32m$(basename "$link")\e[0m"
+  echo -e "Physical device resolved to:  \e[32m$realdev\e[0m"
+  echo "======================================================="
+
+  # 1) Collect lines from Vendor Specific SMART Attributes table
+  # 2) Filter for attribute IDs we care about
+  smartctl -a "$realdev" 2>/dev/null | \
+    awk '
+      /Vendor Specific SMART Attributes with Thresholds:/   { in_table=1; next }
+      /^ID# +ATTRIBUTE_NAME/                                { in_table=1; next }
+
+      # Turn off capture on blank line or start of other sections
+      /^$/                                                  { in_table=0; next }
+      /^SMART Error Log Version:/                           { in_table=0; next }
+      /^SMART Self-test log/                                { in_table=0; next }
+
+      in_table == 1                                         { print $0 }
+    ' | \
+    grep -E "^[[:space:]]*($ATTR_IDS)[[:space:]]+" | \
+    while read -r line; do
+      # Typical line has at least 10 columns:
+      #   ID#  ATTRIBUTE_NAME  FLAG  VALUE WORST THRESH  TYPE    UPDATED  WHEN_FAILED  RAW_VALUE...
+      #
+      # For example:
+      #   190 Airflow_Temperature_Cel  0x0022  075 061 040 Old_age Always - 25 (Min/Max 18/30)
+      #
+      # We want:
+      #   attr_id   = fields[0]
+      #   attr_name = fields[1]
+      #   raw_value = everything from fields[9] onward (combined)
+
+      fields=($line)
+
+      attr_id="${fields[0]}"
+      attr_name="${fields[1]}"
+
+      # Rebuild the raw_value from the 10th field onward
+      # (because columns 0..8 correspond to ID, NAME, FLAG, VALUE, WORST, THRESH, TYPE, UPDATED, WHEN_FAILED).
+      # The raw value could contain parentheses, e.g. "25 (Min/Max 18/30)".
+      raw_value=""
+      for ((i=9; i<${#fields[@]}; i++)); do
+        if [ -z "$raw_value" ]; then
+          raw_value="${fields[i]}"
+        else
+          raw_value="$raw_value ${fields[i]}"
+        fi
+      done
+
+      # For attributes 241 or 242, if raw_value is purely numeric, compute TB
+      tb_append=""
+      if [[ "$attr_id" == "241" || "$attr_id" == "242" ]]; then
+        # Check if purely numeric
+        if [[ "$raw_value" =~ ^[0-9]+$ ]]; then
+          # Convert LBAs to TB = raw_value * 512 * 1.0e-12
+          tb=$(awk -v val="$raw_value" 'BEGIN { printf "%.2f", val * 512 * 1.0e-12 }')
+          tb_append=" (${tb} TB)"
+        fi
+      fi
+
+      # Print only [ID] [Name] [Raw Value]
+      printf "%3s  %-25s  %s%s\n" \
+             "$attr_id" \
+             "$attr_name" \
+             "$raw_value" \
+             "$tb_append"
+    done
+
+  echo ""
+done