25 Apr
2018
25 Apr
'18
4:02 p.m.
Ron Natalie <ron(a)ronnatalie.com> writes:
RK05’s were 4872 blocks. Don’t know why that number
has stuck with
me, too many invocations of mkfs I guess. Oddly, DEC software for
some reason never used the last 72 blocks.
I guess that's because they implemented DEC Standard 144, known as
bad144 in BSD Unix. It's a system of remapping bad sectors to spares at
the end of the disk. I had fun implementing that for the wd (ST506)
disk driver in NetBSD, once upon a time...
-tih
--
Most people who graduate with CS degrees don't understand the significance
of Lisp. Lisp is the most important idea in computer science. --Alan Kay