diff --git a/audit/internal/collector/storage.go b/audit/internal/collector/storage.go
index efdb2fc..f577d9d 100644
--- a/audit/internal/collector/storage.go
+++ b/audit/internal/collector/storage.go
@@ -77,11 +77,24 @@ func discoverStorageDevices() []lsblkDevice {
 		if dev.Type != "disk" {
 			continue
 		}
+		if isVirtualBMCDisk(dev) {
+			slog.Debug("storage: skipping BMC virtual disk", "name", dev.Name, "model", dev.Model)
+			continue
+		}
 		disks = append(disks, dev)
 	}
 	return disks
 }
 
+// isVirtualBMCDisk returns true for BMC/IPMI virtual USB mass storage devices
+// that appear as disks but are not real hardware (e.g. iDRAC Virtual HDisk*).
+// These have zero reported size, a generic fake serial, and a model name that
+// starts with "Virtual HDisk".
+func isVirtualBMCDisk(dev lsblkDevice) bool {
+	model := strings.ToLower(strings.TrimSpace(dev.Model))
+	return strings.HasPrefix(model, "virtual hdisk")
+}
+
 func lsblkDevices() []lsblkDevice {
 	out, err := exec.Command("lsblk", "-J", "-d",
 		"-o", "NAME,TYPE,SIZE,SERIAL,MODEL,TRAN,HCTL").Output()
diff --git a/iso/overlay/usr/local/bin/bee-john-gpu-stress b/iso/overlay/usr/local/bin/bee-john-gpu-stress
index 9960ee2..3dc7d25 100644
--- a/iso/overlay/usr/local/bin/bee-john-gpu-stress
+++ b/iso/overlay/usr/local/bin/bee-john-gpu-stress
@@ -190,4 +190,13 @@ CHOSEN_FORMAT=$(choose_format) || {
 }
 
 echo "format=${CHOSEN_FORMAT}"
-exec ./john --test="${SECONDS}" --format="${CHOSEN_FORMAT}" --devices="${JOHN_DEVICES}"
+PIDS=""
+for opencl_id in $(echo "${JOHN_DEVICES}" | tr ',' ' '); do
+    ./john --test="${SECONDS}" --format="${CHOSEN_FORMAT}" --devices="${opencl_id}" &
+    PIDS="${PIDS} $!"
+done
+FAIL=0
+for pid in ${PIDS}; do
+    wait "${pid}" || FAIL=$((FAIL+1))
+done
+[ "${FAIL}" -eq 0 ] || { echo "john: ${FAIL} device(s) failed" >&2; exit 1; }
diff --git a/iso/overlay/usr/local/bin/bee-openbox-session b/iso/overlay/usr/local/bin/bee-openbox-session
index c812e84..6e9c4fe 100755
--- a/iso/overlay/usr/local/bin/bee-openbox-session
+++ b/iso/overlay/usr/local/bin/bee-openbox-session
@@ -24,7 +24,7 @@ chromium \
     --no-first-run \
     --disable-session-crashed-bubble \
     --disable-features=TranslateUI \
-    --start-fullscreen \
+    --start-maximized \
     http://localhost/ &
 
 exec openbox