The dd command can generate a file containing 0xFF what ?

General usage is dd if = / dev / zero of = file_name bs = 1024 count = 1024, so you can get a "00 " Fill the paper , if you want to use "FF" filling, there is no direct approach ?
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n = 1000
while [$ n-ne 0]
do
echo-e '\ 0377 \ c' >> file_name
((n = n-1))
done
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+1
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applause
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dawned , 0377 is the octal 0xFF, strace discovery is so output , has not react.
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above method if you generate a K on M, 0xff file is too slow. You can use the following method :
<2> Full 0xff files generated 2M
tr '\ 000' '\ 377'