CompuServe Messages

#CD Caching slow?

    18-Jun-93 09:34:59
Sb: #CD Caching slow?
Fm: Roscoe Thomas 71777,2564
To: all
I was running a few tests on a cdrom drive under sys 7.1 with two drivers and found some really slow times for copying 16.3 MB of ISO9660 files from CD to HD. About 3:16 for one driver with the 4.2 apple extensions, a few seconds less with the old driver and 3x version, and and extra 10 seconds, with another driver. With caching enabled, it took over 5 minutes. Wonder what kind of access is speeded up with caching, and how fast a group of files can be copied from cd to hd. Got a transfer rate of only 85KB with the copy on a MAc II. I expected that maybe the HD speed would give me the limit. This seems low since I get 135KB under os/2 and 148KB under DOS with the same drive and file copy. I knew that CD seemed slower on the mac. What kind of times do you other owners get with big file copies. Timed from releasing the mouse after dragging the folder to the desktop until the copy box is cleared.