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From: tappan@bbn.com (Dan Tappan)
Newsgroups: comp.sys.mac
Subject: Magic 30 HD vs System 4.1
Message-ID: <2634@bbn.COM>
Date: Sat, 27-Jun-87 17:42:40 EDT
Article-I.D.: bbn.2634
Posted: Sat Jun 27 17:42:40 1987
Date-Received: Sun, 28-Jun-87 04:46:41 EDT
Sender: news@bbn.COM
Lines: 34


I have a "Magic 30" Hard disk drive that I've been using with no problems with
System 3.2 since last August.

I just tried to update to System 4.1, but when I booted 4.1 off of a floppy
I got a message "Unable to read drive, Initialize?" refering to the hard
disk.

If I run "Disk First Aid", under 4.1, on the drive it normally says
"Disk cannot be read" but occasionally says "verifying disk" for 
long enough to read a sector or so and then goes back to "cannot be read".

My assumption is that there is some sort of a timing problem in the 
driver on the Magic 30 which is incompatable with the current SCSI 
driver.

If I boot 3.2 off the drive it continues to work fine.

Before I try to get hold of the company that sells the thing I wanted
to ask the net a couple things

1) Has anyone out there encountered and solved this problem?

2) Is there any chance of my being able to use the Apple HD20SC initializer
to write a working driver onto the drive? The controller seems to be an
ADAPTEC ACB 4070 (?) and has PROMs reading 
	ADAPTEC INC
	400138-00 C
	(c) 1984

Thanks,
Dan Tappan
							tappan@bbn.com
							..!harvard!bbn!tappan