Control: tags -1 wontfix On Tue, Jul 4, 2023 at 5:02 PM Jakub Wilk <jw...@jwilk.net> wrote: > > * Mathieu Malaterre <mathieu.malate...@gmail.com>, 2011-07-28 17:49: > >For some reason the following command: > > > >dd if=/dev/zero of=testfile_4G bs=4G count=1 > > > >produces a 2G file: > > > >$ dd if=/dev/zero of=testfile_4G bs=4G count=1 > >0+1 records in > >0+1 records out > >2147479552 bytes (2.1 GB) copied, 64.1528 s, 33.5 MB/s > > This happens because: > > * "read() (and similar system calls) will transfer at most 0x7ffff000 > (2,147,479,552) bytes". > > * dd does not continue after a short read, unless you use > iflag=fullblock.
Thanks :)
