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> usb booting problem,detected as floppy, unable to boot usb on intel845g,BIOS detect/map usb stick as floppy
 
 alvinwong
post Jan 15 2009, 05:14 AM
Post #21





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If you would like to boot from USB flash drive,
I recommend you to format it as FAT32.
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 jaclaz
post Jan 15 2009, 08:35 AM
Post #22


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@alvinwong

For the record, the "floppy" can be formatted with ANY filesystem.

Particular motherboards may need it to be FAT12 and/or to be 1.44 or 2.88 Mb in size, but the actual difference, as far as a "normal" well written BIOS is used, is that the device has (HD-like) or has NOT (floppy-like) a MBR.

Also, some moherboard BIOS may have other limits, like the first CHS barrier (528 Mb) and/or other ones.

Depending on the OS, filesystem used may affect (positively or negatively) real world performance:
http://www.msfn.org/board/index.php?showtopic=125116

"zip" format is actually TWO formats, one with MBR and one without, with a particular setup:
http://www.boot-land.net/forums/?showtopic=4830
http://www.win.tue.nl/~aeb/linux/zip/zip-1.html

Other "strange" behaviours are listed in FAQ #10:
http://home.graffiti.net/jaclaz:graffiti.n...SB/USBfaqs.html

and an even more peculiar one is reported here:
http://www.boot-land.net/forums/index.php?showtopic=4863


jaclaz
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