![]() ![]() when partitioning it if aligned to MiB it does used all space, no near 1MiB unpartitioned space at end, but when aligned to cylinders the last incomplete MiB is not used. One important thing: I have seen a 8GiB LG USB stric (one i own) that refuses to be listed on an physical UEFI PC boot if partitions are not aligned to cylinders, but be seen on other UEFI PCs and also on VirtualBOX with UEFI boot mode activated. Fourth partition for BIOS_Grub (no format, but cleared when created).Third partition for EFI (what windows call ESP) formatted as Fat32 with at least 512MiB (i have seen some PCs that if using less they do not show USB stick as a bootable media).Second partition for Grub2 and SystemRescueCD.iso file with at least 1GiB (better if 2GiB so you can carry two versions of SystemRescueCD.iso at same time, just for testing the new version prior to replace the old one), i normally use Ext4 filesystem for it.First partition (able to be seen from Windows 7 and up) on NTFS with the rest of the size of the USB stick.USB stick (formated on GPT mode) with four partitions.Real complex motive: use advanced hardware (UEFI) if possible. Why? Simple answer: it will boot on a lot of PCs, some has UEFI some has only 32 bit old BIOS, etc. USB stick to boot a Live SystemRescueCD.iso loop from Grub2. I will give one extra point/motive for having both, EFI and BIOS grub. Unlike MBR, GPT is not limited to four primary partitions, so you needn't hoard your primary partitions like a leprechaun hoarding his gold. ![]() Aside from when setting up the system or doing partition maintenance, those partitions will be pretty much invisible to you, and they give you a lot of flexibility. I suspect you're getting hung up on the fact that separate partitions are required for the GRUB/GPT and EFI approaches, but that's not a big deal. The EFI approach is the safest and most flexible approach. The BIOS/MBR approach is the least safe and the most clumsy of the three approaches I've just outlined. This is subjective, of course, but I disagree with that assessment. GhostMotleyX, your comment to LiveWireBT's response opined that the "best" way to install is BIOS/MBR. EFI's newness also means it's not as well-tested, which accounts for a host of EFI-specific problems.) (OTOH, EFI also stores data on boot loaders in NVRAM, which creates a second point of failure in the boot process. This makes them easier to identify and manipulate. The EFI approach is much safer and much more flexible than the BIOS approach, since it doesn't tuck raw code away in weird places boot loaders reside in files, just like OS-level programs. GParted and parted identify the ESP as having its " boot flag" set, although that terminology means something completely different on MBR disks.) An ESP can exist on either a GPT disk or an MBR disk, but the former is much more common on EFI-based computers. ![]() ( Confusingly, Debian and Ubuntu installers refer to the ESP by the name "EFI boot partition," but this name is non-standard.
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