Requires gmet m1.1.2 or later. These archives are written by RocksDB 10.9.1 and cannot be opened by 0.10.x releases (Unknown Footer version).
Upgrade before the Camellia hard fork at block 117,764,000.
All archives are RocksDB-engine chaindata: run gmet with --userocksdb 1. LevelDB snapshots are not provided.