pete%LBL-CSAM@vortex.UUCP (08/03/83)
From: Pete Carah <vortex!pete@LBL-CSAM>
The disk cache in DOS 2.0 is used by the DOS (in this priority order)
for:
1. Keeping FAT records for drives currently in use.
2. Keeping directory records for drives currently in use.
3. Keeping partial sectors being read/written by user code.
When a read/write request involves one or more complete sectors,
generally those sectors will NOT be left in the cache. Also, if you
have a hard disk you need more buffers than IBM says you should have.
(In my installation, just FAT records are 29 buffers). If
sub-directories are used, those use lots of buffers too. I generally
use 40 on start-up, and am considering more.
Pete