On Mon, Apr 23, 2018 at 4:01 PM, Noel Chiappa <jnc@mercury.lcs.mit.edu> wrote:

No, in V6 filesystems, block numbers (in inodes, etc - also the file system
size in the superblock) were only 16 bits, so a 50MB disk (100K blocks) had to
be split up into partitions to use it all. True of the RP03/04 in V6 too (see
the man page above).

Venix 86 2.0 has a daddr_t of 16-bit as well. Venix is V7 based and is limted to 32MB. It looks like the filesystem includes this limitation as well. The winchester driver doesn't have the partitioning trick that the r* drivers form the pdp-11, it seems.

Warner