> reformatted, then they will have MBR partition tables similar to the > following. > > Disk: sd0 geometry: 492/64/32 [1007616 Sectors] > Offset: 0 Signature: 0xAA55 > Starting Ending LBA Info: > #: id C H S - C H S [ start: size ] > ------------------------------------------------------------------------ > 0: 0B 0 1 32 - 491 62 7 [ 63: 1007496 ] Win95 FAT-32 > 1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused > 2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused > 3: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
I'm still trying to put an MS-DOS (FAT32) file system on a usb flash drive using OpenBSD--I never imagined that it would be so difficult. Here's where I'm stuck: I've been trying to use fdisk to create MBR partition tables, but I can't figure out how Windows (or Mac) chooses the values for the CHS information. I am assuming that the Windows and Mac formatting utilities do it the "right" way, especially since they both choose exactly the same values. Can anybody help? The best documentation I could find is http://ftp.bg.openbsd.org/OpenBSD/3.3/i386/INSTALL.pt It claims that most new versions of FDISK start the first partition (primary or extended) at cylinder 0, head 1, sector 1 where "FDISK" refers to the corresponding utility used by Windows, Mac, etc. to write the MBR partition table. But that clearly is not true. After testing different drives on Windows and Mac, I have found that the starting sector is usually near the end of the track (sector 32 in the example above), rather than at sector 1. Why?
