DF5554: cam_calc_geometry truncation harness (production DragonFly 6.5-DEVELOPMENT #1: Wed Oct  7 13:21:14 UTC 2026
DF5554[sane-8TB-disk]
DF5554[sane-8TB-disk]   in : vol=15628000000 bs=512 ext=1
DF5554[sane-8TB-disk]   ker: H=255 S=63 C=972798 status=0x01
DF5554[sane-8TB-disk]   tru: H=255 S=63 C=972798 (true size_mb=7630859)
DF5554[sane-8TB-disk]   ok (matches 64-bit math)
DF5554[2^43 sectors (4PiB@512B): size_mb wraps to 0]
DF5554[2^43 sectors (4PiB@512B): size_mb wraps to 0]   in : vol=8796093022208 bs=512 ext=1
DF5554[2^43 sectors (4PiB@512B): size_mb wraps to 0]   ker: H=255 S=63 C=547531467 status=0x01
DF5554[2^43 sectors (4PiB@512B): size_mb wraps to 0]   tru: H=255 S=63 C=547531467 (true size_mb=4294967296)
DF5554[2^43 sectors (4PiB@512B): size_mb wraps to 0]   ok (matches 64-bit math)
DF5554[2^32*16065: cylinders wraps exactly to 0]
DF5554[2^32*16065: cylinders wraps exactly to 0]   in : vol=68998649610240 bs=512 ext=1
DF5554[2^32*16065: cylinders wraps exactly to 0]   ker: H=255 S=63 C=4294967295 status=0x01
DF5554[2^32*16065: cylinders wraps exactly to 0]   tru: H=255 S=63 C=4294967296 (true size_mb=33690746880)
DF5554[2^32*16065: cylinders wraps exactly to 0]   <<< MISMATCH: u64->u32 truncation in cam_calc_geometry (cam.c:389/cam.c:398)
DF5554[2^32*16065+16064: cylinders wraps to 0]
DF5554[2^32*16065+16064: cylinders wraps to 0]   in : vol=68998649626304 bs=512 ext=1
DF5554[2^32*16065+16064: cylinders wraps to 0]   ker: H=255 S=63 C=4294967295 status=0x01
DF5554[2^32*16065+16064: cylinders wraps to 0]   tru: H=255 S=63 C=4294967296 (true size_mb=33690746887)
DF5554[2^32*16065+16064: cylinders wraps to 0]   <<< MISMATCH: u64->u32 truncation in cam_calc_geometry (cam.c:389/cam.c:398)
DF5554[max-u64 (crafted READ CAPACITY(16))]
DF5554[max-u64 (crafted READ CAPACITY(16))]   in : vol=18446744073709551615 bs=512 ext=1
DF5554[max-u64 (crafted READ CAPACITY(16))]   ker: H=255 S=63 C=4294967295 status=0x01
DF5554[max-u64 (crafted READ CAPACITY(16))]   tru: H=255 S=63 C=1148256711715502 (true size_mb=9007199254740991)
DF5554[max-u64 (crafted READ CAPACITY(16))]   <<< MISMATCH: u64->u32 truncation in cam_calc_geometry (cam.c:389/cam.c:398)
DF5554[zero-volume]
DF5554[zero-volume]   in : vol=0 bs=512 ext=1
DF5554[zero-volume]   ker: H=64 S=32 C=0 status=0x01
DF5554[zero-volume]   tru: H=64 S=32 C=0 (true size_mb=0)
DF5554[zero-volume]   ok (matches 64-bit math)
DF5554[block_size=0 (div-guard check)]
DF5554[block_size=0 (div-guard check)]   in : vol=1000000 bs=0 ext=1
DF5554[block_size=0 (div-guard check)]   ker: H=0 S=0 C=0 status=0x04
DF5554[block_size=0 (div-guard check)]   tru: H=64 S=32 C=488 (true size_mb=0)
DF5554[block_size=0 (div-guard check)]   rejected by guard (status != CMP)
DF5554: done