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xCAT Network Boot Agent
b515977955
Some BIOSes (observed with an AMI BIOS on a SunFire X2200) seem to reset the BIOS drive counter at 40:75 after a failed boot attempt. This causes problems when attempting a Windows direct-to-iSCSI installation: bootmgr.exe calls INT 13,0800 and gets told that there are no hard disks, so never bothers to read the MBR in order to obtain the boot disk signature. The Windows iSCSI initiator will detect the iBFT and connect to the target, and everything will appear to work except for the error message "This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the computer's BIOS menu." Fix by checking the BIOS drive counter on every INT 13 call, and updating it whenever necessary. |
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gPXE README File gPXE is an implementation of the PXE specification for network booting, with extensions to allow additional features such as booting via HTTP, iSCSI, and AoE. In generally, gPXE is compatible with the industry-standard PXE specification, and also supports Etherboot .nbi file loading and some additional protocols and features. For more detailed information about gPXE, please visit our project website at: http://etherboot.org/ BUILDING gPXE IMAGE FROM SOURCE If you don't want to install development tools, and have access to the Web, you can get gPXE and Etherboot ROM images made on demand from http://rom-o-matic.net/ If you would like to compile gPXE images from source, here are some tips. We normally compile gPXE images on x86, 32-bit Linux machines. It is possible to also use x86-64 machines. We use gcc compiler options to create 32-bit output. It is important to have the necessary software packages installed. A gcc-based toolchain is required. The following packages (at least) are required: - a gcc tool chain (gcc 3.x or gcc 4.x) - binutils - perl - syslinux - mtools To test your environment, cd to the "src" directory and type: make You should see a lot of output, and when it stops, the "bin" directory should be populated with gPXE images and object files. To learn more about what to build and how to use gPXE, please visit our project website at http://etherboot.org/ , particularly the "howto" section. CONTACTING US Pointers to our project mailing lists are on http://etherboot.org/ Real-time help is often available on IRC on the #etherboot channel of irc.freenode.net.