The boot device for this blade boot sequence. Note that some types of blades don't support floppy disk drive. It is recommended that all boot sequence 1,2 3, and 4 be configured starting from boot sequence 1. If there is any duplication of the configured boot sequence and the current configuration, the two boot sequence will be swapped. For an example: the current boot sequence is 1=HD0, 2=CD, 3=FD, 4=HD1 If the user wants to configure 1=FD which is a duplication of 3 then the new boot sequence will be: 1=FD, 2=CD, 3=HD0, 4=HD1 (1 and 3 swapped) Not all hard drives are available on all blade configurations. The 'Iscsi critical' option has a special meaning: the blade tries to find an iscsi boot device and if it does not it keeps trying forever.