[Coco] Large file deletion fails on NitrOS9/6309

[Alex Evans]

Considering all the trouble it caused with some utilities, I just
avoid multisector clusters and live with volume sizes <~128MB.

On Tue, May 26, 2020 at 2:40 PM Jeff Teunissen <deek at d2dc.net> wrote:
>
> Deleting files that cross a $x000 cluster boundary seems to be broken in
> the latest NitrOS9, and probably has been for a very long time.
>
> I have an uncompressed .ar file, 'cococ.ar', that's about 3 megabytes in
> size. I use it to move up-to-date C source code from my Linux system to my
> virtual CoCo hard disks. When I delete the archive from the disk, the
> system mostly locks up -- that is, the "delete" command never finishes and
> no programs can be run, though things like CLEAR to change windows still
> function normally.
>
> When I issue the command "del cococ.ar", the directory entry is marked
> deleted as expected, and the allocation map is updated...but it seems to
> stop updating the disk allocation map at the next $x000 cluster boundary.
>
> On the disk, the file starts at cluster $189C and goes all the way to
> cluster $5A80, and is referenced in LSNs 4-12. The deletion succeeds up to
> the end of LSN 4, which describes clusters $1800-$1FFF, and then nothing
> further works.
>
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