Scrub Errors Out Due to Missing piece_cache.bin

Issue Report

Running scub on a farm throws out an error if piece_cache.bin is not present. This could be expected on farms created or managed with farming cluster.

This should probably be downgraded to a warning instead.

Environment

  • Advanced CL: gemini-3h-2024-jul-16

Problem

2024-07-19T12:56:14.636039Z  INFO {farm_index=0}: subspace_farmer::single_disk_farm: Checked 1880/1889 sectors
2024-07-19T12:56:16.255298Z  INFO {farm_index=0}: subspace_farmer::single_disk_farm: Checking cache file path=/mnt/plots/02018/piece_cache.bin
2024-07-19T12:56:16.259954Z ERROR {farm_index=0}: subspace_farmer::commands::scrub: Irrecoverable farm error occurred, your file system might need to be repaired or disk might need to be replaced path=/mnt/plots/02018 error=Cache file does not exist at /mnt/plots/02018/piece_cache.bin

Makes sense, thanks for suggestion!