> I found this in the man page of /dev/urandom on Solaris: "The limitation per > read for /dev/random is 1040 bytes. The limit for /dev/urandom is (128 * > 1040 = 133120)." That seems to be the reason but I think dd should handle > that and check the return value of the read() system call and make sure > 1024k bytes have really been read from /dev/urandom.
"bs=N" means "write(,,read(,,N))" [error checking has been elided for presentation here] so if the read is short then the write will be also. Check the manual page. Consider ibs=, obs=, iflag=fullblock. --
