From a30ec33b98be7a8110103000a856f13b15a60d9c Mon Sep 17 00:00:00 2001
From: "Aaron D. Lee" <aaron.daniel.lee@mgial.com>
Date: Thu, 8 Jan 2026 13:40:31 -0500
Subject: [PATCH] Fix SD card flashing progress display

- Remove pv (showed read progress, not write progress)
- Use dd status=progress for actual write progress
- Reduce block size to 1M (better for slow SD cards)
- Remove conv=fsync (sync at end instead, faster)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 rpi/flash-image.sh | 31 +++++++++----------------------
 1 file changed, 9 insertions(+), 22 deletions(-)

diff --git a/rpi/flash-image.sh b/rpi/flash-image.sh
index 743f9ac..c2ddf5f 100755
--- a/rpi/flash-image.sh
+++ b/rpi/flash-image.sh
@@ -278,29 +278,16 @@ echo ""
 echo -e "${GREEN}Flashing image to $SELECTED...${NC}"
 echo ""
 
-# Flash with dd (optionally with pv for progress)
-if [ "$HAS_PV" = true ]; then
-    echo -e "${YELLOW}Flashing with progress...${NC}"
-    if [ "$COMPRESSED" = true ]; then
-        case "$COMP_TYPE" in
-            xz)  pv "$IMAGE" | xzcat | sudo dd of="$SELECTED" bs=4M conv=fsync 2>/dev/null ;;
-            zst) pv "$IMAGE" | zstdcat | sudo dd of="$SELECTED" bs=4M conv=fsync 2>/dev/null ;;
-            gz)  pv "$IMAGE" | zcat | sudo dd of="$SELECTED" bs=4M conv=fsync 2>/dev/null ;;
-        esac
-    else
-        pv "$IMAGE" | sudo dd of="$SELECTED" bs=4M conv=fsync 2>/dev/null
-    fi
+# Flash with dd (status=progress shows actual write progress)
+echo -e "${YELLOW}Flashing (this may take several minutes for SD cards)...${NC}"
+if [ "$COMPRESSED" = true ]; then
+    case "$COMP_TYPE" in
+        xz)  xzcat "$IMAGE" | sudo dd of="$SELECTED" bs=1M status=progress ;;
+        zst) zstdcat "$IMAGE" | sudo dd of="$SELECTED" bs=1M status=progress ;;
+        gz)  zcat "$IMAGE" | sudo dd of="$SELECTED" bs=1M status=progress ;;
+    esac
 else
-    echo -e "${YELLOW}Flashing (install pv for progress bar)...${NC}"
-    if [ "$COMPRESSED" = true ]; then
-        case "$COMP_TYPE" in
-            xz)  xzcat "$IMAGE" | sudo dd of="$SELECTED" bs=4M conv=fsync status=progress ;;
-            zst) zstdcat "$IMAGE" | sudo dd of="$SELECTED" bs=4M conv=fsync status=progress ;;
-            gz)  zcat "$IMAGE" | sudo dd of="$SELECTED" bs=4M conv=fsync status=progress ;;
-        esac
-    else
-        sudo dd if="$IMAGE" of="$SELECTED" bs=4M conv=fsync status=progress
-    fi
+    sudo dd if="$IMAGE" of="$SELECTED" bs=1M status=progress
 fi
 
 echo ""