null dp

[Keith Duthie]

Hi, does anyone have any idea what the following means? (note: this is
with drdos 7.02)

DISK read @12/12/26 (1) -> 0x8a014 OK.
ERROR: DISK: null dp
Sector not found 1!
DISK 192 read [h:0,s:0,t:0](1)->0x2821
DISK c0 undefined.
MFS: Finished dos_fs_redirect
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