The two-volumes case proves multiple DEVICES; this proves multiple
volumes on ONE device. make-partitioned-image.py lays several FAT32
partitions (each from make-fat-image) behind a classic MBR; the new
partitioned-volume case attaches one such disk (two partitions,
da7a0001 at lba 2048, da7a0002 at lba 83968) as a single usb-storage
device.
partition.allVolumes walks the table and the manager spawns a confined
fat per partition on the SAME block channel, each clamped to its own LBA
range by usb-storage's per-badge range table — so partition B's fat
cannot read partition A's blocks. The case asserts two mount lines at
two distinct non-zero base_lbas on one device; against the pre-uncap
allVolumes (S3 step 2, capped to one partition) only da7a0001 mounts.
No image is committed — the disk is generated per run. Full suite
130/130 (128 + two-volumes + partitioned-volume).
Daniel Samson
d59279422e