# Default: 'mkfs.ext4'
# MKFS=''
+# Command line options for file system creation tool.
+# Default: no default.
+# MKFS_OPTS=''
+
# Filesystem tuning tool to apply on $TARGET.
# If empty, the created file system will not be tuned.
# Default: 'tune2fs -c0 -i0' if ext* filesystem is used, no default otherwise.
# Default: 'no'
# FIXED_DISK_IDENTIFIERS='yes'
+# Disk identifier when using FIXED_DISK_IDENTIFIERS='yes'.
+# Use uuid-runtime's uuidgen tool to generate random UUIDs on demand.
+# Default: '26ada0c0-1165-4098-884d-aafd2220c2c6'
+# DISK_IDENTIFIER="$(uuidgen)"
+
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