Hi! To add a bit of clarification:

https://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/ellis/uhdd/2021-10-30/uhdd_2021-10-30.zip

The updated UHDD is only 5 kB, the current UDVD2 is less
than 4 kB. So the size difference compared to using only
UIDE is very small now, with UIDE being 7 kB in size.

However, UHDD has new features such as Read Ahead or DMA
Caching Overlap, giving you extra speed compared to UIDE.

So to get all features, it is best to use the powerful pair
of UHDD and UDVD2 for your disk speed, CD/DVD/... and disk
and CD/DVD cache needs. For the latter, make sure that UHDD
is loaded first, so UDVD2 can detect the already active disk
cache: This gives you one unified cache for all drives, both
fixed (harddisk/SSD) and optical (CD/DVD etc.) with between
a few MB and several GB of cache size - see the docs :-)

Regards, Eric

PS: Also check out RDISK and XMGR for small-in-memory
RAMDISK and HIMEM (XMS/HMA) style drivers by Jack. It
is often possible to have part of the drivers in HMA,
further reducing DOS memory use. See the docs for more.



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