On minidisk, DISKFAST uses an undocumented interface to read/write 64K at a time. In SFS it uses a documented interface to do the same. This assumes that the FST bit for compressed file is off. When that bit is on, all of the stages use the FSREAD/FSWRITE macros to allow the compression stuff to intercept those SVCs.
j. 2009/12/7 DUGALEIX Michaël <[email protected]> > Hello, > > Could you elaborate on the subject (I think I'm not off-topic, sorry if I > am ...) ? > > By roughly telling us(me...) what are the differences these stages : > Performance, algorithm (the "erase trick" you mentionned ?), use, non-use, > ... ? > > For example, the DISKSLOW help file ("pipe ahelp DISKSLOW") says "without > buffering records", whereas the DISKFAST help does not. > Which would suggest that DISKFAST buffers records ? > > Thanks > Michaël >
