30354fe40e
expand-overlay now splits eMMC into: - p3 (3GB): overlay filesystem (system + configs) - p4 (~54GB): ext4 data partition -> /mnt/data/docker Docker data-root auto-configured to /mnt/data/docker on first boot.
30 lines
970 B
Bash
30 lines
970 B
Bash
#!/bin/sh
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# /etc/uci-defaults/99-expand-overlay
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# Stage 1: Resize p3 to 3GB, create p4 for Docker data.
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# Auto-removed by uci-defaults after first run.
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FLAG_FILE="/etc/expand-overlay.done"
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[ -f "$FLAG_FILE" ] && exit 0
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# Only run if root is on eMMC
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ROOT_DEV=$(mount | grep ' / ' | awk '{print $1}' | sed 's/p[0-9]*$//')
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[ "$ROOT_DEV" != "/dev/mmcblk2" ] && exit 0
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# Save backup of original partition table
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sfdisk -d /dev/mmcblk2 > /etc/sfdisk.bak 2>/dev/null
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# Step 1: Resize partition 3 to exactly 3GB (3072 MiB)
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# instead of expanding to fill the entire disk
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echo ",3072M" | sfdisk -N 3 /dev/mmcblk2 2>/dev/null
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# Step 2: Create partition 4 using the remaining space
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# sfdisk -N 4 with ",+" = start after p3, fill to end
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echo ",+" | sfdisk -N 4 /dev/mmcblk2 2>/dev/null
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# Step 3: Write RESET marker on p4 so stage 2 knows to format it
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echo "RESET000" | dd of=/dev/mmcblk2p4 bs=512 count=1 conv=notrunc,sync 2>/dev/null
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touch "$FLAG_FILE"
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exit 0
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