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With sdb on a USB stick I see: # parted --script /dev/sdb mklabel msdos mkpart primary fat32 2048s 100% set 1 boot on # mkdosfs /dev/sdb1 mkdosfs 3.0.12 (29 Oct 2011) # fsck.vfat -rvw /dev/sdb1 dosfsck 3.0.12 (29 Oct 2011) dosfsck 3.0.12, 29 Oct 2011, FAT32, LFN Checking we can access the last sector of the filesystem Boot sector contents: System ID "mkdosfs" Media byte 0xf8 (hard disk) 512 bytes per logical sector 4096 bytes per cluster 32 reserved sectors First FAT starts at byte 16384 (sector 32) 2 FATs, 32 bit entries 3903488 bytes per FAT (= 7624 sectors) Root directory start at cluster 2 (arbitrary size) Data area starts at byte 7823360 (sector 15280) 975242 data clusters (3994591232 bytes) 62 sectors/track, 124 heads 0 hidden sectors 7817216 sectors total Checking for unused clusters. Checking free cluster summary. /dev/sdb1: 0 files, 1/975242 clusters # syslinux /dev/sdb1 # fsck.vfat -rw /dev/sdb1 dosfsck 3.0.12, 29 Oct 2011, FAT32, LFN There are differences between boot sector and its backup. Differences: (offset:original/backup) 3:53/6d, 4:59/6b, 5:53/64, 6:4c/6f, 7:49/73, 8:4e/66, 9:55/73, 10:58/00 ... , 466:72/00, 467:72/00, 468:6f/00, 469:72/00, 470:0d/00, 471:0a/00 1) Copy original to backup 2) Copy backup to original 3) No action ? 1 Perform changes ? (y/n) y /dev/sdb1: 1 files, 9/975242 clusters # fsck.vfat -rw /dev/sdb1 dosfsck 3.0.12, 29 Oct 2011, FAT32, LFN /dev/sdb1: 1 files, 9/975242 clusters Assuming fsck is right I would expect syslinux to update the boot sector backup too. syslinux-4.02-5.fc16.x86_64 dosfstools-3.0.12-1.fc16.x86_64
same with syslinux-4.05-1.fc17.x86_64
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Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.