* 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.
--
Jakub Wilk
