Erigon Datadir Operations

Duplicating a Datadir

Given a source path and destination path, follow this procedure exactly.

Precondition Checks

All checks must pass before copying. Abort on the first failure.

1. Source exists: test -d <src> — abort if missing
2. Source is a valid Erigon datadir: verify all three exist:
   • <src>/nodekey (file)
   • <src>/snapshots/ (directory)
   • <src>/chaindata/ (directory)
3. Destination does not exist: test ! -e <dst> — abort if it already exists
4. Destination parent is writable: test -w "$(dirname <dst>)" — abort if not
5. Report source size: run du -sh <src> and always tell the user the size before proceeding
6. Detect APFS: find the mount device for the destination parent directory from mount output. If the mount entry contains apfs, use the APFS CoW procedure below; otherwise use the full-copy procedure.