On Sun, Jan 15, 2006 at 12:34:46PM +0000, Brian Candler wrote: > I am trying to prepare an MS-DOS disk image file (for later dd to a USB > device) but am having difficulties getting newfs_msdos to work in this way. > This is under 5.4-RELEASE.
P.S. it seems that the total disk size given by -s is in sectors not bytes (this isn't very clear in the manpage). This doesn't help the simple case: # newfs_msdos -h 64 -u 32 -s 256000 /dev/md0 newfs_msdos: Cannot get number of sectors, Operation not supported # newfs_msdos -h 64 -u 32 -s 256000 -S 512 /dev/md0 newfs_msdos: Cannot get number of sectors, Operation not supported But finally I found an incantation that works: # newfs_msdos -h 64 -u 32 -s 256000 -f 1440 -a 125 -F 16 -b 4096 -c 8 /dev/md0 /dev/md0: 255728 sectors in 31966 FAT16 clusters (4096 bytes/cluster) bps=512 spc=8 res=1 nft=2 rde=224 mid=0xf0 spf=125 spt=32 hds=64 hid=0 bsec=256000 # mount -t msdos /dev/md0 /mnt # df -k | grep md0 /dev/md0 127872 8 127864 0% /mnt That was a lot harder work than I was expecting, especially having to use trial-and-error on the sectors per FAT value. Is there any chance that newfs_msdos could gain some intelligence and be able to choose suitable default values? Furthermore, why do I still have to pretend that the device is a 1440K floppy disk? If I remove -f 1440 I get: # newfs_msdos -h 64 -u 32 -s 256000 -a 125 -F 16 -b 4096 -c 8 /dev/md0 newfs_msdos: Cannot get number of sectors, Operation not supported Regards, Brian. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
