On Thu, 15 Jul 2004, William M. Quarles wrote: > Jim Higson wrote: > > What do you mean by "all ones" - all binary ones (which is filling it with > > byte 255) or ones on the byte or word level? > > Binary ones. A byte of all 1's would be 11111111b, which would be 0xff hex or 255 for an unsigned char (if you're using C). A word would be 1111111111111111b, or 0xffff hex, or 65535 for an unsigned short int. A "binary 1", would be either 00000001b (0x01) or 0000000000000001b (0x0001). Most utilities, when talking about "filling a hard drive with all 1's" (in my experience) speak of the first or second option above, depending upon who wrote the code, and when. Ben
