Fix local keyword used outside function, document storage-01 HBA layout

- Remove `local` from max_parallel_jobs/job_count (not inside a function)
- Document storage-01 physical layout: mobo SATA ports, HBA Mini-SAS HD
  ports C0-C3, U.2 NVMe serial numbers

Ref #25

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

driveAtlas.sh

@@ -520,8 +520,18 @@ declare -A SERVER_MAPPINGS=(
     "
 
     # storage-01
-    # Motherboard: ASRock A320M-HDV R4.0 with AMD SATA controller at 02:00.1
+    # Motherboard: ASRock A320M-HDV R4.0
-    # 4 SATA ports used (ata-1, ata-2, ata-5, ata-6) - ata-3/4 empty
+    #   AMD SATA controller at 02:00.1 (bays 1-4)
+    #   Mobo SATA physical layout:
+    #     top-left=bay 1, bottom-left=bay 2, top-right=bay 3, bottom-right=bay 4
+    # HBA: LSI SAS3416 at 01:00.0 (4x Mini-SAS HD ports, top=C0 to bottom=C3)
+    #   C0 (top): 4x SATA breakout → bays 5-8
+    #   C1: 4x SATA breakout → bays 9-10 (2 of 4 ports used)
+    #   C2: U.2 NVMe (serial ends in 0d66) → u2-1
+    #   C3: U.2 NVMe (serial ends in 0d4f) → u2-2
+    #   NOTE: HBA PHY-to-bay mapping needs verification via ls -la /dev/disk/by-path/
+    #   NOTE: U.2 drives require HBA firmware update to appear
+    # Also present: 09:00.0 AMD FCH SATA Controller [AHCI mode]
     ["storage-01"]="
         pci-0000:02:00.1-ata-1 1
         pci-0000:02:00.1-ata-2 2
@@ -994,8 +1004,8 @@ if [[ "$SKIP_SMART" != true ]]; then
     SMART_CACHE_DIR="$(mktemp -d)"
     log_info "Collecting SMART data in parallel..."
 
-    local max_parallel_jobs=10
+    max_parallel_jobs=10
-    local job_count=0
+    job_count=0
     for bay in $all_bays; do
         device="${DRIVE_MAP[$bay]}"
         if [[ -n "$device" && "$device" != "EMPTY" && -b "/dev/$device" ]]; then