I had to look that up myself.
"On Linux, if extlinux is installed and the target USB drive is ext2 or ext3, extlinux is used instead; the config file is installed in /extlinux.conf. The partition to which it has been installed is also marked as active. Hard Disk (frugal) install mode" However, I'd suggest that the OP just use the usb as if it were a real hard drive and follow the bt installer. I use ext2 and no swap partition for usb flash drives. To be safe, use ext4. Too much overhead to run an os from usb and journal and swap space in my opinion. Easy enough to make a new flash drive by the time it fails. |
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SD cards operate on 1/2 M chunks at once. What I don't understand is why 2048 is used instead of 1024. 1024*512 = 1/2 Meg. Maybe it's looking ahead to when SDD drives are over 2 T in size and work on 1024 byte blocks. |
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The only things to select a filesystem on are how well it supports the device. Ext4 has the advantage of supporting trim mount - this can take advantage of the devices capabilities by avoiding useless writes (writing nulls when they go to the wrong block). Ext2/3/4 will all work. If you are trying to share files with no security restrictions, then FAT is the way to go. |
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