26 Apr
2018
26 Apr
'18
11:51 a.m.
Johnny Billquist <bqt(a)update.uu.se> writes:
Uh... DEC STD 144 does not have anything to do with
remapping bad
blocks to replacement good blocks. DEC STD 144 describes how a media
stores known bad blocks on a disk, so that file system initialization
can then take whatever action needed to that these blocks are not used
by anything. In RSX (and VMS), they will be included in a file called
BADBLK.SYS, and thus be perceived as "used".
Thanks for the clarification, Johnny!
As with so much else these days, DEC STD 144 is available on-line:
https://archive.org/details/bitsavers_decstandar_576622
Interesting reading -- and the scheme used in RSX and VMS is exactly
as required by the standard in section 4.1: "Small Operating System
Conformance".
-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