beta_code# file -s /dev/ad[0-9]s[0-9]
/dev/ad4s1: x86 boot sector, code offset 0x52, OEM-ID "NTFS    ", sectors/cluste
r 8, reserved sectors 0, Media descriptor 0xf8, heads 255, hidden sectors 63, do
s < 4.0 BootSector (0x80)
/dev/ad4s2: x86 boot sector, code offset 0x52, OEM-ID "NTFS    ", sectors/cluste
r 8, reserved sectors 0, Media descriptor 0xf8, heads 255, hidden sectors 307323
45, dos < 4.0 BootSector (0x80)
/dev/ad4s3: x86 boot sector, code offset 0x3c, reserved sectors 0, Media descrip
tor 0x0, reserved 0x16, dos < 4.0 BootSector (0x1f), BSD disklabel