Compressing unix disks

[Guy Harris]

> I have never done the tests, but given the difference between the
> 4.2BSD FFS and the old 4.1BSD FS, if the SV FS is much like the 4.1BSD
> FS (which, I gather, it is),

It is.  Both are minor variants of the V7 FS; the main difference between the
SV and 4.1 versions is that the SV version has a magic number in the super
block that indicates whether it's a 512-byte or 1KB file system, whereas the
4.1 FS is always a 1KB file system (at least in the standard 4.1 release).