System hangs on DVD device
Scot Hetzel
swhetzel at gmail.com
Mon Sep 20 07:51:34 PDT 2004
On Sun, 19 Sep 2004 05:23:53 -0400, Justin Smith <jsmith at drexel.edu> wrote:
> FreeBSD jsmith.org 5.3-BETA4 FreeBSD 5.3-BETA4 #0: Fri Sep 17 03:00:30
> EDT 2004 root@:/usr/obj/usr/src/sys/MYKERNEL i386
>
> When I try to boot, I get (after a while)
>
> acd1: DVDROM <JLMS DVD-ROM LTD-166S/DS08> at ata1-slave UDMA40
>
> and then
>
> ATAPI-RESET time = 50us
> ATAPI-RESET time = 180us
>
> endlessly repeated. I can only boot the system after unplugging the DVD
> drive.
>
> Any suggestions?
>
My CD-ROM drive will hang the system when booted from a kernel with no
debugging options enabled. Try booting a kernel with the following
debugging options enabled.
makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
# Debugging for use in -current
options KDB # Enable kernel debugger support.
options DDB # Support DDB.
options GDB # Support remote GDB.
options INVARIANTS # Enable calls of extra
sanity checking
options INVARIANT_SUPPORT # Extra sanity checks of
internal structures, required by INVARIANTS
options WITNESS # Enable checks to detect
deadlocks and cycles
options WITNESS_SKIPSPIN # Don't run witness on
spinlocks for speed
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