Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!decwrl!ucbvax!DOCKMASTER.NCSC.MIL!TMPLee
From: TMPLee@DOCKMASTER.NCSC.MIL
Newsgroups: comp.sys.apple2
Subject: re: SCSI formatting etc.
Message-ID: <900813044412.673860@DOCKMASTER.NCSC.MIL>
Date: 13 Aug 90 04:44:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 17

Mike -- if you posted that before, I'm afraid I missed it.  And I think
I would have remembered the trick about using the Finder to format at
1:1.  A couple of comments -- my guess is that the SCSI utility formats
at 4:1, maybe 3:1 since my linear performance improved by a factor of
3.6 when I reformatted at 1:1.  On the other hand, when I moved the
drive to the MacIntosh to format it, the CMS utilities said it was
currently (after I had used the Apple SCSI utility) formatted at 10:1.
Although I'm skeptical of that since that itself was already nearly a
2:1 improvement over what it was shipped formatted at.

It doesn't surprise me that /RAM5 measures slow.  (I too got a figure
about twice as slow as my hard drive on linear read) -- there is
probably a fair chunk of software in there to make it look like a block
device, and all transfers are done with loads and stores (maybe a block
move?)  rather than DMA.

TMPLee@dockmaster.ncsc.mil