Hi,

> Which aspects of SFT changed and how? Are there potential
> performance issues because we no longer can cache certain
> data in extra fields of fnodes?

It seems to me that the fnode (as defined in fnode.h) doesn't save any  
information that isn't contained in the SFT, except the new file dates and  
times (in the directory entry) which are accessed with a filename instead  
of a SFT; so they're not required in the SFT. Note that the directory  
entry's cluster and index into cluster (as found in the fnode) can be  
computed with some shifting from the entry's sector and index into sector  
(as found in the SFT) when the sector size, cluster size and the sector of  
the first cluster is available (all found in a valid DPB or EDPB).

>> * Fixed Int21/AX=4409 for drives from device drivers.
>
> What was wrong?

I'm interested too.

Regards,
Christian

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