tboegi@xxxxxx writes: > From: Torsten Bögershausen <tboegi@xxxxxx> > > The command `dd bs=101M count=1` is not portable, > e.g. dd shipped with MacOs does not understand the 'M'. Very good piece of information to have here. > Use `bs=1048576 count=101`, which achives the same, instead. I'd locally tweak (read: no need to resend) it to Use `dd bs=1048576 count=101`, which ... and downcase "Call" on the title line. A tangent. I wonder how portable dd bs=1024x1024 count=101 dd bs=1kx1k count=101 are in practice. "Two or more positive decimal numbers (with or without 'k' or 'b') separated by 'x', specifying the product of the indicated values" is from POSIX, but I haven't used it myself (I know GNU dd groks it). In any case, thanks for the update.