After creating an image file with : dd disk/mbr disk/fdisk disk/prep
the resulting partition table in the mbr is buggy : the chs values in the mbr are incompatible with bios. bios uses the formula (c*H+h)*S+s-1 to calculate the lba values with H=256, S=63 while c (cylinder), h(head), s(sector) are the values from chs entries in the mbr partition table. disk/fdisk uses the same formula while setting H=64, S=32. If you write this image to real Hardware (HDD, USB-Sticks) some bios won't boot from such media especially if your boot drive has a size less than 8GB cause for media with sizes less than this size some bios'es use CHS addressing and some verify that sector id's from chs and lba are equal. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T2298f52fc324cff9-Mb36b2ccec84dc4eb9d0a8c21 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
