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Date:      Thu, 4 Feb 1999 12:04:36 +0100 (CET)
From:      Sebestyen Zoltan <szoli@netvisor.hu>
To:        FreeBSD questions mailinglist <freebsd-questions@FreeBSD.ORG>
Subject:   FreeBSD (2.2.8) CD-ROM vulnerability
Message-ID:  <Pine.LNX.3.96.990204115540.18915A-100000@linux.intranet.netvisor.hu>

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I've just tired to mount a DEC OSF/1 install-CD on my UltraPleX SCSI CDROM
(Tried both cd9960 and ufs filesystems). I didn't succeed and got the
following messages: 

Feb  4 11:37:14 nv4 /kernel: cd1(ahc0:3:0): NOT READY asc:3a,1
Feb  4 11:37:14 nv4 /kernel: cd1(ahc0:3:0): NOT READY asc:3a,1
Feb  4 11:37:41 nv4 /kernel: cd0(ahc0:2:0): data overrun of 16777215 bytes detected in Data-In phase.  Tag == 0x1.  Forcing a retry.
Feb  4 11:37:41 nv4 /kernel: cd0(ahc0:2:0): Have seen Data Phase.  Length  = 1024 .  NumSGs = 1.
Feb  4 11:37:41 nv4 /kernel: sg[0] - Addr 0xe40400 : Length 1024

 However, there were no problems when I 'cat'-ted the contents of the CD
into /dev/null. (Just to see if there are any reading problems.) 
 A minute later the machine resetted, and I'm almost sure that it
happened because of the problems I mentioned above.
 Do you have some idea what happened and what do these messages mean? I
wonder why can some problem with a CD (both IDE and SCSI) bring FreeBSD
down on his knees so easily. 

--------------------------------------------------------------------------------
Sebestyén Zoltán <szoli@netvisor.hu>	I'm believing that the Holy Spirit is
					gonna allow the hand, and the foot, and
MAKE INSTALL NOT WAR			the mouth, just to begin to speak, and
                                        to minister, and to heal coordinated by
					the head.

I use UNIX because reboots are for hardware upgrades.

		   -- Waiting for FreeBSD 3.1, not Godot --


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