Some ISOs On A HDD Do Not Boot

#1
I have 9 iso images on an internal hdd and only 7 of them will boot using EasyBCD. The exact same images, copied from the hdd to a usb stick, boot without error via EasyBCD. Hopefully, enlightenment is nigh.
 
#2
Appending to the original post; as a matter of convenience I desire to boot each of all 9 utilities from the hard drive. The two that do not boot hang at a Grub prompt. When using these ISOs from the USB store there are no problems.

I have refreshed, recreated and pleaded with the hdd store configuration and still no luck.

Anyone's help will be greatly appreciated.
 

mqudsi

Mostly Harmless
Staff member
#3
Hello ovldub,

Install defraggler and use the single-file defragment feature on the ISO images, then see what happens?