我想知道是否有某些版本的dd不理解乘法后缀。在dd手册页上写着: read and write BYTES bytes at a time (also see ibs=,obs=)
BLOCKS and BYTES may be followed by the following multiplicative suffixes: c =1, w =2, b =512, kB =1000, K =1024, MB =1000*1000, M =1024*1024, xM =M GB =1000*1000*1000, G =1024*1024*1024, and so