Hi,
Recently I tried to create a Fedora 14 bootable USB key for X86_64. In the
Kickstart script I want to use Linux EDD (Bios Enhanced Disk Drive
Services) module to get the biosdisk information, however I met some
strange behaviors. Following is the two tests:
1. Install GRUB2 ((GRUB) 2.00) to the USB key and boot up the system, the
EDD module cannot be correctly loaded with following kernel error message:
edd information not available
2. Install GRUB 0.97 to the USB key and boot up the system, the EDD module
could be loaded successfully. All the kernel option is the same with the
previous case.
Looking into the code, Linux uses BIOS INT41 and INT48 calls to collect
disk information during boot up stage, it seems that when GRUB2 is used,
these calls cannot give correct information...
However, I also tried to add debug information to GRUB2, the INT41 worked
correctly for GRUB2.
Anyone could help me to explain the reason? Thanks a lot.
-Weber
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