Creating a new disk image

Bcachefs focus exclusively on reading Bcachefs archive. The easiest way to create a new archive is to use the standard bcachefs-tools.

> NAME=bcachefs.img CONTENT_SRC=content/ scripts/make_disk_image.sh
# External UUID:                  ec05f4c8-d3c8-440e-b4d4-c1adca266f92
# Internal UUID:                  59a6e1f3-a879-43a5-a3c4-fcb726a720a1
# Device index:                   0
# Label:                          LabelDEADBEEF
# Version:                        14
# Oldest version on disk:         14
# Created:                        Fri Dec 17 20:34:30 2021
# Squence number:                 0
# Block_size:                     4.0K
# Btree node size:                128.0K
# Error action:                   ro
# Clean:                          0
# Features:                       new_siphash,new_extent_overwrite,btree_ptr_v2,extents_above_btree_updates,btree_updates_journalled,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes
# Compat features:
# Metadata replicas:              1
# Data replicas:                  1
# Metadata checksum type:         none (0)
# Data checksum type:             none (0)
# Compression type:               none (0)
# Foreground write target:        none
# Background write target:        none
# Promote target:                 none
# Metadata target:                none
# String hash type:               siphash (2)
# 32 bit inodes:                  1
# GC reserve percentage:          8%
# Root reserve percentage:        0%
# Devices:                        1 live, 1 total
# Sections:                       members
# Superblock size:                816
#
# Members (size 64):
#   Device 0:
#     UUID:                       df2cca3d-6a2b-45b0-a601-76a45e928bc5
#     Size:                       10.0M
#     Bucket size:                128.0K
#     First bucket:               0
#     Buckets:                    80
#     Last mount:                 (never)
#     State:                      rw
#     Group:                      (none)
#     Data allowed:               journal,btree,user
#     Has data:                   (none)
#     Replacement policy:         lru
#     Discard:                    0
# initializing new filesystem
# going read-write
# mounted with opts: metadata_checksum=none,data_checksum=none
# INFO:    Converting SIF file to temporary sandbox...
# INFO:    instance started successfully
# Opening bcachefs filesystem on:
#         /bch/disk.img
# recovering from clean shutdown, journal seq 4
# going read-write
# mounted with opts: metadata_checksum=none,data_checksum=none
# Fuse mount initialized.
# fuse_init: activating writeback
#
# ============================================
#
# Run the following commands in another shell:
#         pushd '[...]/bcachefs/scripts' && UNMOUNT=1 ./cp.sh . && popd || popd
#
# ============================================

> pushd '[...]/bcachefs/scripts' && UNMOUNT=1 ./cp.sh . && popd || popd
# [...]/bcachefs/scripts ~
#
# ============================================
#
# Unmounting ...
#
# ============================================
#
# INFO:    Stopping bcachefs instance of /tmp/rootfs-786675488/root (PID=30318)
# ~