Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!snorkelwacker!think!samsung!cs.utexas.edu!rice!sun-spots-request
From: bud@sq.sq.com (Bud Greasley)
Newsgroups: comp.sys.sun
Subject: Ramdisk Pseudo-Device Driver on SunOS 4.0.3
Keywords: Miscellaneous
Message-ID: <4640@brazos.Rice.edu>
Date: 2 Feb 90 03:27:52 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 19
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 21, message 12 of 13

Has anyone succeeded in getting the Ramdisk pseudo-device driver
documented in the "Writing Device Drivers" section of the SunOS 4.0
documentation set to work.

In the release notes for 4.0.3 they mention that it worked under SunOS 3.5
but "may cause your system to crash" under 4.0.n. It does.

Our system craches when I try to do a mkfs on the device.  The problem
seems to be in ramstrategy.   bp->b_un.b_addr points to 0 which causes
problems ie.

	bcopy(raddr, bp->b_un.b_addr, nbytes);

Has anyone bothered to fix this?

Thanks in advance.

Bud Greasley
.!utzoo!sq!bud