31 Jan
2022
31 Jan
'22
5:13 p.m.
On Mon, 31 Jan 2022, Paul Koning via cctalk wrote:
Yes, RT-11 is a somewhat unusual file system in that
it doesn't just
support contiguous files -- it supports ONLY contiguous files. That
makes for a very small and very fast file system.
The only other example I know of that does this is the PLATO file system.
The UCSD P-System had contiguous files. If small files had been deleted,
so that space was fragmented, you had to run a "CRUNCH" program to
defragment it. Directory entries had the starting location and length.
As for partition vs. file, the two differences I see
are: (1) layering: the partition is below the file system. (2) partitions are originally
entirely static (set at creation and never changed) and even later on changed only rarely
and typically with substantial technical difficulty.
paul
--
Fred Cisin cisin at xenosoft.com
XenoSoft http://www.xenosoft.com
2245 Carquinez Avenue (510) 234-3397
ElCerrito, CA 94530